Studio Sound February 1982 £1 and BROADCAST ENGINEERING

studio sound February 1982 £1 AND BROADCAST ENGINEERING

,r a

Metering Interconnection. Test equipment & maintenance

www.americanradiohistory.com _ IY i.i 7 A L - As. Aii W II I. M----M S_W_Ir -Iii/ 7 J -All -M6.1INIV 7 MP MI MORE FOR LESS

The Soundcraff Series 800 is the answer for any pro who's always wanted more console... but didn't have the space. A Series 800 can give more console in less space to the recording engineer. .. the sound -

mixer, , . or performing musician. And, with the new emphasis on sound for mobile video recording, a Series 800 can be the perfect fit in a cramped van! The Series 800 is a compact 8 buss console available in 18, 26 or 32 input mainframes and can be configured for recording, sound reinforcement or

stage monitoring . ..with no compro- mises in performance or quality. In fact, the Series 800 is built using the same quality components that go into the Series 2400. Compact usually means a little board with no features. But, the Series 800 with 18 inputs and 8 outputs, 4 band EQ on all inputs, and a host of other features you want, can fit in the smallest 16 -track studio or production van, because it takes just 31/2 feet of space. The 32 in /8 out frame takes less than 6 feet! Naturally, the compact size of the Series 800 makes it ideal for sound reinforcement or stage monitoring, too. You don't need a Summo wrestler to haul them around like some of the Oriental brands. Besides savings roadies' backs, they save stage or audience space, too. See one of these selected Soundcraff dealers today and have him demonstrate a Series 800 for you. It will give you more of everything you want ...for less.

AUSTRALIA: Klarion Entprs. Pty Ltd., Tel: 03 613 801 AUSTRIA: Kapla, Tel: 02 5274 59 BELGIUM: Trans European Music, Tel: 02 5691823 DENMARK: Studie og Lydteknik, Tel: 3412 84 FINLAND: Studiotec Ky, Tel: 52 06 04 FRANCE: Publison, Tel: 01 357 6408 GERMANY: Hausmann Concert Electronic, Tel: 030 433 6097; Thum & Mahr Audio, Tel: 021 734 1600; GTC Studiotechnik, Tel: 089 29 71 71; Studiotechnik Jurgen Klever, Tel: 040 6901044 GREECE: Bon Studio Systems, Tel: 0121 8725 HOLLAND: Selectronic B.V., Tel: 02975 60 600 ITALY: AEG Telefunken SIPA, Tel: 242 7812 JAPAN: Hibino Electro Sound Inc., Tel: 03 864 4961 NEW ZEALAND: Magnetic Products Ltd.,

Tel : 09 760 607 NORWAY: Scanax, Tel: 02 11 40 85 SINGAPORE: Turnkey Services Co., Tel: 734 5736 Soundcraft SOUTH AFRICA: Tru -fl Electronics S.A., Tel: 838 4930 THE CHALLENGER SWEDEN: Tal &Ton Gothenburg, Tel: 80 36 20 SWITZERLAND: Professional Audio Systems A.G., Soundcraft Electronics Limited Soundcraft Electronics U.S.A. Tel: 504151 Place, suite 120 THAILAND: Bangkok Cine /Graphic Center, 5 -8 Great Sutton Street 20610 Manhattan Tel: 02 75387 London EC1V OBX England Torrance, CA 90501 U.K.: Turnkey, Tel: 01- 440 9221 01-251 -3631 Telex: 21198 (213) 328 -2595 Telex 182 -4 Truck courtesy Electronic Location Productions, Reno, NV Photographed at Compaq. VI o Sales, Burbank, CA www.americanradiohistory.com EDITORIAL EDITOR: RICHARD ELEN ASSISTANT EDITOR: NOEL BELL PRODUCTION: ANN HORAN CONSULTANT: studio HUGH FORD sound SECRETARY: WENDY MARSHALL AND BROADCAST ENGINEERING ADVERTISEMENT GROUP EXEC MANAGER: PHIL GUY FEBRUARY 1982 SECRETARY: AUDREY SLATFORD VOLUME 24 NUMBER 2 PRODUCTION: A LINK HOUSE JACKIE McGRATH ISSN 0144.5944 PUBLICATION Y(uG,R OF THE AUDIT .,,.,.0 OF Ci.CUu.IOA.

PUBLISHER PAUL MESSENGER This month's cover photograph was taken by Roger Phillips Editorial and Advertising Offices: LINK HOUSE, DINGWALL AVENUE, CROYDON CR9 2TA, GREAT BRITAIN 20 Diary People, places and events Phone: 01.686 2599 International: + 44 1 686 2599 24 Studiofile Including The Chicago Recording Co; and Windmill Lane, Telex: 947709 Dublin Telegrams: Aviculture Croydon 28 New Link House Publications P.L.C. 1981 products Recently unveiled equipment All rights reserved 32 Metering NEW ITEMS... STUDIO SOUND is published on the second Friday 38 Test Equipment of the preceding month. The magazine is available ... and PRODUCT GUIDES on a rigidly controlled requested basis only to qualified personnel (see back page for terms) or 50 Interconnection for an annual cost of £16.50 UK, $40 US surface PRODUCT GUIDE covering cables, connectors, jackfields and multiboxes mail, $75 US airmail, £17.50 overseas surface mail or £32.50 overseas airmail to nen- qualifying 54 Standard readers or where more than two copies are -what standard? required in a studio or small organisation. All KEN DIBBLE unravels the intricacies of XLR -type connectors subscription enquiries, including changes of address (which should be in writing and preferably 58 Business BARRY FOX'S regular column including an old address label or at least the 7- digit label code) should be made to the 60 A life on the Subscription Department at the above address. radio waves Studio Sound and Broadcast Engineering incor- PIPPA LEWIS interviews ANDY GEMMELL -SMITH porates Sound International and Beat Instrumental. US mailing agents. Expediters of the Printed Word Ltd, 527 Madison Avenue Suite 1217, New York, Reviews: NY 10022. Controlled Circulation postage paid at New York, NY. 64 Sound Technology Model 1500A Total average net circulation of 13,056 per issue Tape recorder test system reviewed by HUGH FORD during 1980. UK: 5,662. Overseas: 7,394. Printed in England 72 Klark-Teknik DN60 HUGH FORD reviews a realtime spectrum analyser

Keeping it all going ... and more replacing a duff module. But they cannot be expected to repair the With the seemingly ever -increasing sophistication of modern audio automation, and even if they know where the `isolate' switch is, this equipment, it must be very difficult being a maintenance engineer. It's may not actually help very much. More than ever, therefore, manufac- all very well if a channel on your nice, standard console or multitrack turer backup is a necessary prerequisite, because as Murphy and his goes down: at the very least you (or the recording engineer even) can corollaries well know, everything that can go wrong, will, and the more simply swap modules to keep the session going. But what do you do sophisticated the equipment, the more 'wrong' it can go. It pays to be when the gala computer -based automation system goes out to lunch in very friendly to your manufacturers and distributors, so that you can the middle of the master mix? At least modern systems of this type do sneak their home phone numbers and call them up at 3.30 in the not have the habit of taking your ears out as well by turning all the morning to come down and repair your ailing Z -80 (6502s, 6800s and VCAs up to full gain when data is lost, but there's still the problem of 6809s, by the way, also go wrong, they just do it faster). Until all studios what to do to keep things moving and avoid losing the client after the work normal office hours, you will need that 24 -hour 'faultline' which dreaded event. Some mixes these days are so complex that it could well your manufacturer, I hope, can offer you in your area. be impossible to do a decent job without the automation. And while it Even if you haven't lost your maintenance staff yet, it still pays to would not be foolish to suggest that if this is the case, you should have have gear whose maker or distributor offers this kind of backup. Quite planned the session better in the first place, so that those synthesiser simply, Mr Maintenance is unlikely to be an analogue audio expert and tracks didn't suddenly turn into recorders, tubular bells and syndrums a computer expert, and even if, as is likely, he has a microcomputer at every few moments, this does not get you out of the immediate problem home with which he dabbles, like as not his little ZX8I bears nothing of what the hell to do next! more than a passing resemblance to your studio's InterGalactic 'What the hell you do next', of course, is to pick up the internal MacroGoogolplex -based automation system. phone and shout "Help! and ", this is where you discover that the main- Despite this, the passing of the good old maintenance department is tenance department is also out to lunch or, more common these days, rather sad, and roll on the day when economics permit them to darken there isn't one. is It a sad fact that, in the name of economy -nay, the studio doors with 1kHz tones, soldering irons and the hallowed survival -many studios, even top -class ones, have been forced to lose words 'Ampex Reproduce Alignment Tape Zero -One - Dash -One . . . their maintenance staff, relying instead on freelancers to come along once again. A good maintenance department in the Old Days didn't just and do the dirty work every so often as required. Engineers are relied keep it all going: it also made those nice little boxes which all the upon to line up the machines the for session and at least know how to engineers love to have at 45 minutes notice. Apart from making sure produce a fault report (otherwise known as white Chinagraph marks on that sound came out at all, and that clients were happy with it, they also the offending knobs). Engineers lining up tape machines is no bad contributed a vital part of your studio's Sound. We still need them thing, of course, and they should also be capable of isolating and today, more than ever. Richard Elen

www.americanradiohistory.com Drum KIt wï fingertap

The Shop for Service STUDIO r AMPEX SECA Soundex RmcrOn'ASHLY' EQUIPMENT JBL SERVICES LTD spendor FORMULA SOUND SONIFEX The Shop, NEUMANN N AKG Technics 100 Hamilton Road, BEYER NW11 9DY. QUAD London ULMER TEAC TAMPA Telephone 01 -458 9133 Ey bd Telex 87515 WISCO G RE'VOX recce (MxR) WNW

4 STUDIO SOUND, FEBRUARY 1982

www.americanradiohistory.com th Cymbals pin'good...

The new Linn Drum machine's claps, tambourine, cabasa, cowbell and better. Still no sticks attached. But then clave. you don't need them. You let your fingers Operating do the drumming. Just tap a button, even the Linn is surprisingly simple. Unpack it, for the clash of the cymbals or the rap of plug it in and you're the rimshot. ready to play. You'll be laying down rhythm tracks in a matter of minutes. All you do is And it's all in real time. The Linn hit 'record' and let your has real drum sounds digitally recorded fingers do the drumming. and stored in memory. No synthesised Come to 20 Conduit Place and sounds either- they're real drum beats, try the Linn. You'll find it's fingertappin' like actual congas, toms, snare, hihat, good!

Syco Systems Ltd 20 Conduit Place London W2 Tel 01 -723 3844 for an appointment,

ELECTRO -VOICE RE 20. THE MICROPHOf1E mOrT The studio -microphone RE 20 is a cardioid HIGHLY PRAIIED microphone of the variable -D- series, i. e. incorporating the patented system that In RECORDf1G avoids proximity effect and reproduces the true sound. It was especially developed 1TUIDIO1. for broadcasting, recording studios and sound reinforcement applications and therefore features an essentially flat frequency response, a very wide frequency range, an exellent transient response and numerous further sophisticated qualities appreciated in recording studios. It is, therefore, not surprising that more and more recording studios so highly praise the various Electro -Voice microphones. Why not ask for further partic- ulars from Gulton Europe Ltd., Electro- Voice Division, Maple Works, Old Shore- ham Road, HOVE BN3 7EY. Ey ElecfroVoice' a gulmn company S.A.

Telephone: Brighton (0273) 23329 Telex: 87680 Gulton G

www.americanradiohistory.com THE MXT -500 Up to 14 inputs and 2 main outputs rack mounting. in flight case or for drop- through mounting Inbuilt power supply and optional battery pack Audix Limited, Wenden, Saffron Walden, Essex GtB1 1 4LG, England Telephone Saffron Walden (0799) 40888 Telex 817444

Caud i x

Vertriebsges. fur Electronic- Componenten m.b.H. Future Film Developments, 36/38 Lexington Str = - t, London WIR 3HR, Rumfordstraße 10, 8000 Munchen 5, Germany. England. Telephone: 01- 4371892/3. Telex: 21624 ALOFFD G. O ì roti r I n p RD Cables: Allotrope- London WI. o Telefon: 089/22 53 56. Telex: 05 285 92 gtcff d.

6 STUDIO SOUND, FEBRUARY 1982

www.americanradiohistory.com MUSIC LAB HIRE

TAPE RECORDERS DAY WEEK AMPLIFIERS Revox B77 15 45 Quad 405 8 24 Revox PR99 20 60 Bose 1800 18 54 Uher Report 4200 10 30 Teac A3440 20 60 Tascam 80-8 40 120 MIXER -AMPLIFIERS Soundcraft 382-8 75 225 Bose PM 2 20 60 Tascam 85-16 80 240 Soundcraft 762/16 150 450 Teac M144 Portastudio 12 36 CROSSOVERS Tascam 122 10 30 Brooke Siren 320 Teac 133AV 10 30 10 30 Brooke Siren 340 15 45 MIXERS LOUDSPEAKERS Alice 828 10 30 Alice 1228 12 36 Auratones Cubes 2 6 Soundcraft 1S 25 75 Portawedge Monitors 3 9 Teac 2A 8 24 Bose 802'S 15 45 Tascam M35 15 45 Mega 12 -10 15 45 Studiomaster 8 -4 15 45 Tannoy LRM 15 45 Allen & Heath 16 -4 -2 15 45 Tannoy Super Reds 18 56 Soundcraft 800 60 180 NOISE- REDUCTION Microphones (Dynamic) Dolby 361 10 30 AKG D12 3 6 DBX 150 8 24 AKG D222 3 6 Bel BC3 -2T 8 24 AKG D330 3 6 Bel BC3 -8T 15 45 Shure SM57 3 6 Teac RX9 10 30 Shure SM58 3 6 Sennheiser 421 3 6 COMPRESSOR -LIMITERS Sennheiser 441 3 6 DBX 160 8 24 MICROPHONES (CONDENSER) DBX 165 12 36 MXR Dual Limiter 10 30 AKG C451/CK1 3 9 AKG C451/CK8 5 15 DIGITAL DELAY AKG C451/CK9 6 18 AKG VR1 Extension Tube 18" 1 Delta Lab DL1 10 30 3 Delta Lab DL4 AKG VR2 Extension Tube 36" 2 6 15 45 Neumann Lexicon PCM 41 U47 10 30 15 45 Neumann U87 Lexicon 93 Prime Time 20 60 10 30 Neumann KM84 5 15 ANALOGUE DELAY MICROPHONE SUNDRIES MXR Flanger /Doubler 10 30 Table Stand Roland Space Echo 1 2 10 30 Upright /Boom Roland Chorus Echo 1 3 12 36 Microphone Combiner Bell Multi Adt 4 12 1 3 Microphone Splitter 1 3 Direct REVERBERATION Injection Box 1 3 Neumann Power Supply /1 Way 1 Master Room 3 XL -305T 15 45 Neumann Power Supply /2 Way Lexicon 224 2 6 75 225 AKG N66E Power Suply /6 Way 5 15 Additional Microphone Leads SPECIAL EFFECTS 1 Stage Box 12 Inputs /3 Returns 5 15 Bel BF 20 Flanger 12 36 Stage Box 24 Inputs /3 Returns 6 18 MXR Pitch Transposer 12 36 Cable Drums 2 6 Delta Lab DL5 15 45 Eventide H949 Harmonizer 25 75 VIDEO RECORDERS EQUALISERS Sony 'U' Matic 2631 25 75 Sony Betamax C7 15 45 Klark Teknik DN 30/30 10 30 JVC VHS 15 45 Klark Teknik DN 22 10 30 Klark Teknik DN 27 10 30 VIDEO MONITORS MXR 2 x 15 Graphic 8 24 Sony KV 1400 10 30 MXR 1 x 31 Graphic 8 24 Sony 7210 72" Projector Screen 75 225

Call Richard Eastwood for further information MUSIC LAB, 72 EVERSHOLT STREET, LONDON, NW1 01 388 5392/3/4/5

www.americanradiohistory.com ,fact: this condenser microphone sets a new standard of technical excellence.

The Shure SM81 cardioid condenser is problems which, up to now, have a new breed of microphone. It is a truly restricted the use of condenser high -performance studio instrument microphones. Years of operational tests exceptionally well- suited to the critical were conducted in an exceptionally requirements of professional recording, broad range of studio applications and broadcast, motion picture recording, under a wide variety of field conditions. and highest quality sound As following specifications indicate, reinforcement -and, in addition, is the new offers unprecedented highly reliable for field use. the SM81 performance capability-making it a Shure engineers sought -and found new standard in high quality -ingenious new solutions to common professional condenser microphones.

SM81 puts it all together! WIDE RANGE, 20 Hz to 20 kHz FLAT FREQUENCY RESPONSE. PRECISE CARDIOID polar pattern, uniform with frequency and symmetrical about axis, to provide maximum rejection and Outstanding Ruggedness minimum colouration of off -axis sounds. EXCEPTIONALLY LOW (16 dBA) NOISE Conventional condenser microphones have LEVEL. gained the reputation of being high quality, 120 dB DYNAMIC RANGE. but often at the expense of mechanical and ULTRA -LOW DISTORTION (right up to the environmental ruggedness. This no longer clipping point!) over the entire audio need be the case. The SM81 transducer and spectrum for a wide range of load electronics housing is of heavy -wall steel impedances. MAXIMUM SPL BEFORE construction, and all internal components are CLIPPING: 135 dB; 145 dB with attenuator. rigidly supported. (Production line SM81's WIDE RANGE SIMPLEX POWERING must be capable of withstanding at least six includes DIN 45 596 voltages of 12 and 48 random drops from six feet onto a hardwood Vdc. floor without significant performance EXTREMELY LOW RF SUSCEPTIBILITY. degradation or structural damage.) It is SELECTABLE LOW FREQUENCY reliable over a temperature range of -20° F RESPONSE: Flat, 6 or 18 dB /octave rolloff. to 165° F at relative humidities of 0 to 95%! 10 dB CAPACITIVE ATTENUATOR accessible without disassembly and Send fora complete brochure on this lockable. remarkable new condenser microphone!

SM81 Cardioid Condenser Microphone ®F s i-i L) FR Shure Electronics Limited, Eccleston Road, Maidstone ME15 6AU- Telephone: Maidstone (0622) 59881

8 STUDIO SOUND, FEBRUARY 1982

www.americanradiohistory.com The Ultimate

%z 8 Track From Otari a new, fully professional * Built -in lkHz /10kHz test oscillator. compact 8 track recorder. Bearing the * LED tape timer and peak indicator. Otari hallmark of superb performance and * Single card per channel modules and reliability, this is truly the ultimate 1/2- 8 externally accessible electronics track - at a non -ultimate price! adjustment. * DC servo ips * Audio control section has the same capstan 15/7' direct drive functions with +7% varispeed (record /playback). as the 2" Otari MTR90 series. * Computerised motion -sensing control with All audio functions and transport functions dynamic braking. repeated on optional remote control. * Tacho output and DC servo capstan makes * Automatic sync /input changeover on punch - -8 in /out. the MKIII most suitable for audio /video locking applications. * Click -free punch -in /out. * Switchable +4 or -8dBm line input variable or fixed, line output also switchable; XLR input /output connectors. * Wide range of bias adjustment, suitable for all tapes. ITA, 1 -7 Harewood Avenue, Marylebone Road, London NW1. Tel: 01 -724 2497. Telex: 21879 www.americanradiohistory.com Protex quick -release latches, handles, corner pieces and fasteners are used by some of the world's leading manufacturers because they are just right for the job. protei FASTENERS LTD. Arrow Road, Redditch,Wores. Tel: Redditch 63231 il% r POWER AMPLIFICATION BY MUSTANG

44.

Our SS. I00 and SS.50 are economical amplifiers with outputs of up to 175 and 100 Watts RMS into 4 -16 ohms, typical THD figures being 0.1 %, slewing rate > 10v/µs, noise > 90dB down, zero level input, and full electronic protection. Considering these points with their proven reliability and robust construction, plug' in output transistors and driver board, optional balanced input and 100V line output, and virtually ex stock despatches we reckon we take some beating! Contact us now for the full technical specifications. Manufacturers of mixers, integrated mixer amplifiers and slave amplifiers, studio power amplifiers, transformers, lighting control equipment and cabinets for the home and export markets. Contact us for full illustrated technical brochures. Gresham Wood Industries specialise in the manufacture of both MUSTANG standard and custom designed COMMUNICATIONS timber /steel control consoles Eastfield Industrial Estate, Cayton Low Road, Scarborough, Short form catalogue is available on North Yorkshire YOI 13UT request Telephone (0723) 582555 Gresham Wood Industries L \Stansted Essex CM24 8HS Telephone: Bishop's Stortford (0279) 813132

10 STUDIO SOUND, FEBRUARY 1982 Gresham Wood

www.americanradiohistory.com THE INCREDIBLE SOUNDS OF

STEREO SIDE 1 SYNCLAVIER II

BUT YOU DECIDE.

Synclavier H's 30 minute stereo arate note during a live perform- sible on any synthesizer. demo record Each of these will blow you away. ance. You can adjust the amount of sounds can be instantly recalled The violins and cellos are so true, you breath blowing across the sound with the touch of a button. And this can hear the rosin on their bowstrings. hole of your flute to create double is just the beginning. The electric guitar is undiscemible tongueing and overblowing. You can You can modify all of these prepro- from a real electric guitar The trumpets bend your guitar notes and change grammed sounds any way you wish bell like real instruments. The xylo- the vibrato depth during solos. And and then store them. Or create phone gives you the distinct sound of only Synclavier II gives you an abso- sounds from scratch and store them mallets hitting the wooden bars. The lutely real snare drum that lets you as well. The number of sounds you cathedral bells are so resonant, you increase or decrease the amount of can store is unlimited. can feel the overtones. The kick drum snare on the drum. We invite you to listen to a startling and wood blocks have the snap of Synclavier Il comes prepro- sample of the incredible sounds of real life. The human whistling sound grammed with over three dozen real Synclavier II. Better sit down when even captures subtle changes in instruments. In addition, there are you listen. breathing. over 100 unique sounds, many of For a copy of Synclavier II's stereo LP, send And once you have a sound on which have never before been pos- your address plus £2.50 to: Keyboard Hire Ltd Synclavier II, there's 8 Thornhill Road, no limit to what you London NW1 1HN. 01 -607 8797. can do with it. Syn- New England Digital II offers clavier more Corp., Main Street, real time control Norwich, VT 05055, than any other syn- (802) 649-5183. thesizer in the world. Synclavier I l is the You alter registered trade mark of can the New England Digital. bow stroke of your violin Your order will be for each sep- despatched within 7 days.

www.americanradiohistory.com Editing with our new PCM recorders requires this sophisticated hardware. ..Eti A7

The AEG -Telefunken MX80 and MX80a are a completely new breed of PCM tape recorders. Now, for the first time, you can use cut -and -splice editing procedures on a PCM machine. Smooth, silent splices are ensured by a sophisticated automatic cross -fade technique which joins the signals before and after the splice. But AEG -Telefunken didn't stop with just one innovation. They designed these machines to be so simple that anyone familiar with analogue master -tape machines can operate them. For example, they use standard analogue controls; they aren't unduly sensitive to dust and dirt; they're rugged, reliable and simple to maintain and service. Another important feature is that the head assembly is finished to a tolerance of 10 microns, which results in complete compatibility between machines. And you'll be pleased to hear that all these innovations have resulted in a system which is about half the price of our competitors. The AEG -Telefunken MX80 and MX80a - the new breed of PCM recorders. n TELE vKEN AEG-TELEFUNKEN MX 80 MX 80a

Hayden Laboratories Limited, Hayden House, Chiltern Hill, Chalfont St. Peter, Gerrards Cross, Bucks SL9 9UG. Telephone: (02813) 88447/89221

www.americanradiohistory.com INPUT LEVEL ©EL AY 8.0

lgg

3,0

REFLECTIONS O 5

EMT 245 c.ro+ nc r. wn..$Pc rap I I I I I I 1 1 1 1 1 I I I 1 I 1 1 1 1 1 1 1 1 EMT -FRANZ

The EMT 244 gave you the With improved algorithm, warmth of sound you'd expect greater programme memory and, from a plate but in a digital of course, a superbly clean decay, reverberation unit. Now the EMT the EMT 245 has an extremely 245 gives you even greater low noise floor, making it ideal for flexibility. studios, broadcast units and The 245 features natural, mobiles. And you'll warm to its large -room reverberation economical price as well. through adjustable predelay. You To find out how much more have amplitude control over the you can now get from the space - first reflections, selectable pre - saving EMT 245, contact Bauch echo delay in 8 steps from 0 -84ms today. and reverberation time in steps from 0.4 -4.5 secs and frequency response of reverberation time switchable for bass and treble equalisation. The reverberation parameters may be logged in an optional 10 programme store and immediately recalled by the remote control unit.

EMT FRANZ GmbH Post lath 1520,1)-7630 Lahr.

FWO. Bauch Limited 49 Theobald Street, Boreham Wood, Hertfordshire WD6 4RZ Telephone 01- 953 0091, Telex 27502 www.americanradiohistory.com Lindos ... and the art of Audio Maintenance

T1'iii QPk Q -Pk POW LR CCR Wf.i PPM 05 t ..53f fit,P ON

H s'UNCTIt1N VNPUY CQARSÉ i!?n i rLAT DiST tpe COB. .oiSi Z-0 rN

EC -O{ST i/ ion RUMBLE"

BAT' ' fHK a47U WEF LAI of: t N ,i Ot:T4': 4110 NULi.

AoniysFa Nb:

THE LA1 AUDIO ANALYSER - A complete portable audio test set with these facilities: CCIR 468 -2 QUASI Pk NOISE MEASUREMENT Plus 4 other methods down to - 100dBu HIGH OUTPUT +26dBm With 10, 75 or 600 ohm output impedance BALANCED OR UNBALANCED CONNECTIONS Via PO Jacks and BNC connectors PEAK PROGRAMME METER As well as average and true rms characteristics MAINS OR BATTERY OPERATION With automatic charging if a Nickel Cadmium battery is fitted Plus comprehensive provision for measuring signal level. frequency, distortion, rumble, and wow and flutter. LAI -PI with STIP Studio Interface £760 plus VAT. Simpler units available down to £450. Tel: EYKE (03947) 432. Made in Britain by LINDOS ELECTRONICS, Sandy Lane. Bromeswell. Woodbridge, Suffolk. 1P12 2PR. fll C SIMPLE AS THAT

Q-LOCK: An SMPTE /EBU time -code Synchroniser that makes the transition to Video childs play

The operator orientated Q -LOCK system offers the recording studio access to the world of Video post production audio sweetening, increasing the earning potential of existing multitrack facilities. The control panel commands 2 or 3 machines as if they were one, with a 10 memory cycling locator that can be operated with or without time code. Optimised software interfaces to audio and video machines give uncompromised performance. 0-LOCK, incorporating a multi- standard SMPTE /EBU time code generator, is a complete self contained system requiring no additional hardware. Don't get left behind investigate Q -LOCK today.

England.Tel: 0727 32191 Telex: 299951 Europe: AUDIO KINETICS (UK) LTD., Kinetic House, Verulam Road, St. Albans, Herts. AL3 4DH 7 Telex: 194781 America: QUINTEK, 4721 Laurel Canyon Blvd., Suite 209, North Hollywood, CA 91607 Tel: 12131 980 -571 14 STUDIO SOUND, FEBRUARY 1982

www.americanradiohistory.com Console version

Portable The new B67 MkII. Taking precision a step further. Having talked to B67 users the braking system are just two of the recording equipment world available. The over, professionals who refinements built into the B67 Mk II. B67 Mk II takes that precision one demand the highest quality and Easier access to the heads makes for step further. performance standards, Studer now swifter editing and this is further introduce the Mk II version of this aided by automatic blocking of the highly successful 1/4" machine. tension sensors in the stop mode. An even better noise TUDER The B67 was and still is one of the specification and a dual circuit i_!Cr L E_°IQIG C most precise pieces of professional CH-8105 Regensdorf Telephone (01) 840 29 60 FWO. Bauch Limited 49 Theobald Street, Boreham Wood, Hertfordshire WD6 4RZ Telephone 01 -953 0091 Telex 27502 STUDER REVOX AMERICA INC Nashville STUDER FRANCE S A R L Paris STUDER REVOX CANADA LTD Toronto Telephone (615) 329-9576 Telephone 533 5858 Telephone (416) 423 -2831

www.americanradiohistory.com 1111 Eight group outputs plus separate Australia John BarryJI Group, Sydney. Trident Audio are stereo master outputs. Tel: 2- 439 -6955 Belgium A.S.C. Professional Audio proud to announce Long throw conductive plastic Consultants, Brussels. their new range of faders on both inputs and outputs. Tel: 2 -520 -0827 Comprehensive monitoring Canada Hein' Electronics Inc., Markham, Ontario. expandable facilities including monitor pan, Tel: 416 -495-0688 monitor level and mute for each consoles: Trimix. France Lazare Electronics, Paris. group output/machine return. Tel: 1- 878 -62 -10 Trimix offers all the Full sub -grouping facilities. Holland Dick Swaneveld, Hilversum. Tel: 35 -17722 V.U. metering as standard, L.E.D. previous features of the India Kapco Sound Studio, New Delhi. column P.P.M.'s available as an Tel: 43718 well established Fleximix option. New Mandrill Recording Studios, system, plus more Can be 'Fadex' automated at any Zealand Auckland. time. Tel: 9-793222 facilities at a similar price Norway Protechnic A.S., Oslo. Frames can be joined together both Tel: 2- 46 -05 -54 electrically and mechanically to S.E. Asia/ M.B.L. Audio Ltd., Hong Kong. Trimix features make larger systems. China Tel: 5-931006

Eight way monitor module available S Africa Leephy (Pty) Ltd., Blairgowrie 2194, Compact size: Each mainframe to provide sixteen track monitoring. Johannesburg. housing up to 24 modules measures Tel: 11-789 2424 Integral only 40" wide. patchbay available. Sweden Stage & Studio, Gothenburg. Tel: 31- 22 -40 -90 Any module can be placed Trident Worldwide Representation: anywhere in the mainframe Taiwan Unfair Engineering & Trading Ltd., U.S.A. Studio Maintenance Services, Taipei. allowing 'ergonomic tailoring' to Los Angeles. Tel 3214454 -7 customer's requirements. Tel:213- 877 -3311 Wilson Audio Sales, Nashville. Trident Audio Developments Ltd. 4 band equalisation on each input Tel: 615-794-0155 Shepperton Studio Centre, plus 60 Hz filter and EQ bypass. Trident (U.S.A.) Inc., Post No. 38, Studios Road, 652 Glenbrook Rood, Stamford, 4 auxiliary sends, each switchable Connecticut 06906 U.S.A. Shepperton, Middx. TW17 OQD, U.K. pre or post fader. Tel: 203-348-4969 Tel: Chertsey (09328) 60241. (TRIMIX G). Separate mic and line gain controls. Tlx: 8813982 Contact: Steve Gunn. Precision five L.E.D. level indicator on each input module.

www.americanradiohistory.com Neumann The Neumann reputation for quality and reliability in condenser microphones has remained unsurpassed since the 1920's. Half a century later, Neumann are still the first choice.

Audio Export Georg Neumann & Co. GmbH

D - 7100 Heilbronn Fleinerstrasse 29 West Germany

FW.O. Bauch Limited 49 Theobald Street, Boreham Wood, Hertfordshire WD6 4RZ Telephone 01 -953 0091, Telex 27502 17

www.americanradiohistory.com ,..<

:......

and if you agree that it's about time to have your own SYNTOVOX Triple Two VOCODER in the FX -Rack, you'll find us here:

FINLAND GERMANY SWITZERLAND SYNTON USA BRAZIL AUSTRALIA APAN UK FELDON AUDIO LTD ERTAMA MUSI IKKI DYNACORO GMBH 269 LOCUST CENTELEC KLARION PTY LTD I MAI & CO. LTD AUOIOVIDEO LONDON STORE ROBERTSGATAN STRAUBING NORTHAMPTON, MA 01060 RIO OE JANEIRO MELBOURNE SHINJUKU-TOKYO LUGANO (091) 523827 (01) HELSINKI (09) 4213101 (413) 586 -3777 (021) 2876198 (03) 613801 103) 357 -0401 5804314 INTRASON- - FRANCE SWEDEN DENMARK CANADA HONG KONG KOREA S. AFRICA ELTRON LAZARE ELECTRONIC ELFA IC ELECTRONIC HAVANNES GERR STUDER /REVOX LTD GU MI SOUND CO. JOHANNESBURG PARIS (01) 8786210 SOLNA (08) 7300700 AARHUS (045) 6244288 (021) 352276 TORONTO (416) 868 -0528 (5) 412050 SEOUL - 754848 (011) 293066

40541 SYNTO NL SYNTON ELECTRONICS BV P.O.B. B3 3620 AB BREUKELEN HOLLAND ta 03462 -3499 TELEX

18 STUDIO SOUND, FEBRUARY 1982

www.americanradiohistory.com the future of The Fostex M u ltitrac Ker is a Personal Recordinc Studio, that challenges thé quality and facilities of open reel. rack Separate but Is ping -pong possible? Are four inputs also use limiters. equalisers together? Selsync is fully auto- enough? etc or existing pedal effects. ,rid recorder work matic. and you can bound_ It v ,ule point of as one but you can use adjacent tracks with multitrack is to record a Why Personal them independently. The quality. With a little fore- tune a part at a time. With Multitrack? mixer is four in. four out, thought. you can perform one or two musicians. four The Fostex Multitracker with gain. tone. echo and the ten track bounce with is plenty. When you over- and each product in the pan. The four track tape hardly any noise build up. dub, the inputs are used range is designed for deck has remarkable It's a solenoid over again. features. musicians and song- transport? Is monitoring writers. Easy to use and How about noise? The high speed, two complicated? own. We don't believe you Sound quality is astoni- motor design is microchip An automatic monmix'. need to go into the studio shing. The latest Dolby 'C switches between live and business to own the tools I 1=1 1=1 circuitry achieves a drama- 'i signal already on tape. of your trade. I 1_I 1= _I depending on which tracks Visit a Fostex Dealer DO DOLBY C NR controlled, with varispeed you select for record. All and discover the remark- and a digital counter plus you adjust is level. You able Multitracker tic 71dB signal to noise can for return to zero. It's all there also check the stereo will make you ratio. It's performance you mixer yourself. It to speed your creativity. output for quality and think about open would expect from open twice balance. reel. reel. And there's more. Why a footswitch? Dolby's new system has Have you ever tried to How about effects? side benefits that result in work a tape recorder while Your echo unit connects tighter. more transparent playing an instrument? to the 'aux send and or-or-dings. With the Multitracker you return sockets. You can Full function four simply preselect the tracks track? you want to overdub or correct, then run the Dolby and the Double U symbol are traoema of Dolby Laboratories machine in 'record RECORD TRACK ready' and hit the 2 3 4 footswitch on F cue.

There are no restrictions, III four tracks can be recorded at once. Any input can be switched to any track. Or plug into the recorder direct, from another mixer, to add more channels or to capture a live performance. FOSW.X

Bandive Ltd 10 East Barnet Road New Barnet Herts EN4 8RW Tel. 01-440 9304

www.americanradiohistory.com diary

Castle Containers Swedish contract for Digital standards Vulcanised Fibre (TR) Ltd has sup- Calrec breakthrough plied us with details of a range of Calrec Audio has received a contract The first step towards an industry custom built vulcanised fibre worth over £70,000 from Swedish standard for digital recording has containers suitable for use with Television for two communication been taken with an agreement audio equipment. The containers are sound control desks utilising digital between major digital manufacturers claimed by the manufacturers to be control of the audio functions. on sampling rates. Agreement was "as tough as old boots" despite their These custom designed desks are 16- reached between the major manufac- light weight; have reinforced bases channel, 16 -group film dubbing turers, including Soundstream, Sony, and heavy duty end and front carry- desks with VCA channel faders and Studer, 3M and Ampex, at the ing handles; are non -static; and are a central microprocessor logic system recent AES 70th Convention in New designed around an Exorset 30 York. The present agreement, which computer. Features of the desks has also been sanctioned by the EBU include an in -built self -testing pro- and SMPTE, covers only sampling gram allowing instant checking of rates, but this is regarded by many impervious to petrol, oil and grease. all processor and automatable observers as a key factor in the For added protection of equipment functions; new style ergonomic design acceptance or otherwise of digital the Castle containers also feature of the panel configuration; and the recording techniques and equipment, girth straps and snap fasteners, plus ability to operate with multitrack although some commentators have foam padded interiors. Full details tape machines via timecode synchro- suggested that it is too early to of the container range are obtainable nisation. Calrec say that these desks crystallise digital parameters in view from: Castle Containers, Vulcanised will form the design base for a new of the rapid development of this 1311aroamplecair Fibre (TR) Ltd, Bridge Mills, standard range of sound control field. The two sampling rates decided Hadfield, via Hyde, Cheshire, UK. desks, termed the M Series, to be upon are 44.1 and 48kHz; the latter Phone: 04574 3184/5. Telex: 668761. introduced during the coming year. is recommended because of its apparent compatibility with film, video and broadcasting, while ILR news Altec restructure operations with the automated manu- 44.1kHz has been adopted The IBA has released details of Altec has announced that the Cor- facturing techniques already at the additionally, no doubt a contribu- planned improvements to the ILR poration is to offer for sale its Oklahoma City production facility. tory factor being that this frequency radio service to be financed from the facility and associated real estate Altec will still retain a base in has been decided upon for the 'secondary rental' payments accruing located at Anaheim, California. southern California, however, as its Philips /Sony Compact Disc. Many from the current financial year. This move which is designed to give electronics fabrication and assembly, of the technical research chiefs From the total budget resources of the company a sounder financial engineering, marketing and other present at the meeting, on November some f3.07 million, the bulk of base and more modern facilities and support functions will be relocated 2, hailed the agreement as a break- expenditure (some f2.1 million) is to equipment, will entail relocating the to a smaller facility some ten miles through, leading to the true establish- be devoted to the task of expanding bulk of the company's activities to from its present headquarters. ment of the 'digital age'. the ILR system, with the forward its newer manufacturing plant in Additionally, the company's Several manufacturers are making transmitter building programme and Oklahoma City. This plant will warehousing and customer service arrangements to adjust their equip- associated site and equipment costs combine the Anaheim loudspeaker departments are to remain at ment to the 48kHz professional accounting for this sum. The remain- assembly and associated machining Orange, California. standard, including Sony, with their ing budget is to be allocated as 24 -track digital recorder, currently follows: £233,000 to general projects, running at 50.4kHz. Soundstream the test -equipment range is being including contributions to the cost N EAL- Ferrograph and 3M are also ready to move from of sharing programmes within ILR, developments manufactured in Blackburn, it will the early 50kHz rate to the new support for the Parliamentary broad- be sold and marketed through a new standard, while Mitsubishi have yet Instrumenta- casting service, and various bursaries; As many of our readers will know, company, Ferrograph to decide on a change from 50.4kHz, and £738,000 for the provision of North East Audio Ltd was put into tion. although they are likely to follow NEAL range, live and specially recorded music, the hands of a Receiver earlier this With regard to the suit. It should be remembered, the provision of educational cover- year, with the result that the future this has been purchased by Lee however, that more than sampling age, the provision of management availability of the NEAL range of James Electronics Ltd, a new rate standardisation must be achie- formed by Alan Helliwell and broadcast training, and for local cassette machines and the Ferrograph company ved before direct interconnection of community service coverage. range of tape machines and test and Duncan Mitchell to continue to different makes of machine becomes A number of new ILR stations equipment was put in some doubt. manufacture the current range. Sales possible. have recently commenced broadcast- Readers will, however, be pleased to and marketing of NEAL products ing, bringing the total number of learn that the product ranges will is being undertaken by yet another ILR stations on air to a total of 33. continue to be available following new company, Audio Video New additions are Essex Radio the setting up of a number of new Marketing Ltd. Soundfield loan (Southend /Chelmsford) which companies staffed by ex -NEAL- Addresses for the following Calrec Audio has announced that commenced broadcasting on Septem- Ferrograph employees. companies, Ferrograph Recorders, Whitetower Records are now opera- ber 12; Chiltern Radio (Luton/ With regard to the Ferrograph Ferrograph Instrumentation, Ferro- ting a Soundfield mic loan service. Dunstable) commencing on October range, a new company, Ferrograph graph Spares and Service, and Audio This service it is hoped will encour- 15; West Sound (Ayr /Kilmarnock) Spares and Service, has been formed Video Marketing Ltd, are identical: age producers and engineers to try commencing on October 16; and to manufacture and supply spare Unit 21, Royal Industrial Estate, out the mic system for coincident Radio West (Bristol) which commen- parts for all Ferrograph products, a Jarrow, Tyne and Wear NE32 9XX. stereo recording or to explore the ced broadcasting on October 27. service department additionally Phone: 0632 893092. Telex: 537227. possibilities of UHJ 2- channel Looking to the future, two applica- having been set up. A further The American distribution of the Ambisonic recording. Prices for the tions have been received for the company, Ferrograph Recorders, is NEAL and Ferrograph ranges loan package are approximately £30 Newport (Gwent) franchise from now manufacturing the tape machine remains unchanged: NEAL- Ferro- per day, and full details of the ser- Gwent Area Broadcasting and ISCA range, while the Ferrograph test graph (USA) Inc, 652 Glenbrook vice are available from Mike Skeet, Radio Ltd. A decision on the award equipment range has been acquired Road, Stamford, Connecticut 06906, Whitetower Records, 2 Roche of this franchise is not expected until by Park Naval Engineering Ltd of USA. Phone: (203) 348 -1045. Telex: Gardens, Bletchley, Milton Keynes, the early part of 1982. Blackburn, Lancashire. Although 643678. UK. Phone: 0908 73969. 22 I 20 STUDIO SOUND, FEBRUARY 1982

www.americanradiohistory.com HV I; I;V:I,t MIT I'IZ( )I)L'CTs FROM EACH REPRESENTS ABREAKTHROUGH I\T PROFESSIONA .1L"I)IO. EX R Exciter GOldlinC Analyser `'right :I icr( )1)11()UC Judge for yourself. Some A price breakthrough in Call us and arrange to swear it's a trick, others swear hand held analysers. Built in compare this radical by it. Aural excitement is a microphone displays signal on development against the best patent psychoacoustic process a 10 by 10 LED matrix. Kit in the world. You'll hear a new that corrects for generation includes a white /pink noise for transparency ... clarity , . . loss. If you programme or rapid alignment of equipment a big capsule sound in produce music, you should and sound systems. Now you miniature. discover how the EXR can trim controls and see the Find improves separation, results. out more or evaluate enhances music and adds these innovations for yourself loudness. .111115 lagnetoineter by calling: AuratonCs Play safe. Point the base of this precision instrument at Listen on a legend. tape path components and any ftrnkey A compact British amplifier is residual magnetism registers 8 East Barnet Road now available to drive Teak on the scale. It's the only way New Barnet and Road versions for to be sure you are not Herts EN4 8RW personal monitoring. damaging precious masters. telephone: 01 -440 9221 INNO«TIOL

AllimpAnza0 USA 1- 3- 4- 7- + 3- -+ 3 - 10- + 2- -+ 2 -20- + 1- -+ 1 0- - o 1- -- 1 - 3- -- 3 5- --5 7- -- 7 -10- - -10 -20- - -20 Y Y th o Ñ R Y Y Y EX -- CENTER FRED IN Hz IfJTE 5 - - ao -20 FLAT SLOW "P"T - - B5

00dB C HOLD -

- OFF A FAST -,5 INPUT WEIGHT DECAY -,zoRANGE CURVE TIME

CUVP\NY $. hd. U.S.A Equpmn/

www.americanradiohistory.com diciry

DRC consumer digital system where both sides may be autumn of 1983. At present, the Paramount Pictures has The Digital Recording Corporation used, is uncertain. Either two or company is seeking joint develop- Paramount Pictures Corp and its subsidiary, Soundstream, four audio channels are available. ment arrangements with other announced the establishment of a have announced the successful test- The preliminary information received companies, and preliminary discus- technology division to concentrate ing of a laboratory prototype indicates a 50kHz sampling rate, sions have already taken place. on the research and development of domestic digital playback system with the proviso that the system can The primary selling points of the new techniques and equipment for which could ultimately become a be adapted to any future standard system, besides its somewhat futuris- its motion picture and television strong competitor to the Philips/ frequency: in view of recent develop- tic concept, obviously include the activities. Headed by Edgar Johnson Sony Compact Disc. The system, ments, we may expect a final reduction in mechanical complexity and Charles Conaty, the new division which sounds as if it was developed sampling rate of 48kHz (see Digital offered by a fixed record -which is already involved in a number of including motion in 1991 rather than today, is based Standards Breakthrough). The will make for easy manual or 'auto - research projects computer graphics, on a photographically -produced coding is 16 -bit linear, in common changer' operation and design -and picture sound, digital editing film -like record, in the form of a with most other manufacturers, and the potential for low -cost mass - satellite distribution, and high resolution video. card 3 x 5in in size. A laser is used to dynamic range is quoted as greater production. One can even contem- scan the card, the beam being than 90dB. The frequency response plate an 'instant camera' for copying modulated by the stored informa- is given as 0 -22kHz although this ... The 'postcard digital record' is Lindos Electronics tion. This is then converted into an will, of course, depend to a certain an exciting idea, but it will remain to In our November 1981 issue (New audio signal. The card offers Ihr of extent on the sampling rate. THD is be seen whether or not sufficient Products) we gave an incorrect playing time 'per layer' -whether quoted as 0.004 %, although all these marketing pressure and multi - phone number for Lindos Electron- this means a single layer per card, specifications must be presumed to manufacturer agreements will be ics. The company can be contacted modulating the beam by transmission be preliminary, as DRC do not developed to give it a fair hearing on: Eyke (03947) 432. Our apologies through the card, or a reflective expect to market the system until the and consumer acceptance. to Lindos for the error.

Agencies London WIN 5PH. Phone: 01 -580 Radio (Southend /Chelmsford), appointed marketing manager of 3M UK's Recording Materials division. two 4314. Telex: 28668. Radio West (Bristol) and Radio Melkuist Ltd has appointed EECO has appointed Karen Mills overseas agents for its GT800 auto- Ayrshire. as product specialist, broadcast and the USA, FWO Bauch has also supplied The mation system. In Western video products marketing, with North Address changes Manor Studios with Melkuist VCA Studio Maintenance Services, responsibility for new product Hollywood, California has been :\udicord Records has moved to controlled faders to update the planning, and sales and technical appointed with Electro -Media Systems 59 Mayfield Way, Barwell, Leicester Manor's Helios console. Goldstar support. appointed as sub -agents. In Europe, LE9 8BL, UK. The company's tele- Melkuist has supplied phone number remains unchanged: Recording, Hollywood, with a VCA The Sony Corp has appointed Cadac (Holland) BV has been vice 0455 47298. fader system for the studio's Trident Philip Stack as senior president, appointed as Melkuist's Dutch Company, Eastmill Ltd has moved to Unit 8, TSM console. Melkuist has also just Sony Video Products agents. with responsibility for the sales, has Worton Hall Trading Estate, installed its first GT800 console auto- Brooke Siren Systems servicing and merchandising divisions that Klark Teknik Worton Road, Isleworth, Middx mation system in Japan, on a 32- announced of the Sony Video Communications Electronics Inc, 262A Eastern Park- TW7 6ER, UK. Phone: 01 -568 4646. input Trident Series 80 console fitted Tokyo division, Professional Audio division way, NY 11735 with a Fadex fader system, at Farmingdale, and Special Projects. are now Kohgakuin Studio. (Phone: (516) 249 -3660), Fostex Electro- Acoustic Systems, handling the company's products in Contracts The Bee Gees and their co- produ- a division of Interlake Audio Inc, North America. has received a cers Karl Richardson and Albhy Brabury Electronics has appointed Paul Gardocki as Eastmill Ltd has been appointed approximately Galuten have purchased a Sony contract worth vice -president, marketing and UK agent for the range of power PCM-1610 digital audio processor £35,000 to install video distribution development. produced by French high and two Sony BVU-200B recorders amplifiers and interface equipment and Geoffrey Mendenhall has been manufacturer Sertec. Eastmill Ltd, at for use at their Middle Ear recording level audio distribution equipment appointed vice -president, engineer- Unit 8, Worton Hall Trading Estate, the Royal Opera House, Covent studios. Cetec Gauss has supplied cassette ing with responsibility for research Worton Road, Isleworth, Middx Garden. duplication systems to CBS UK; EMI and development, by Broadcast TW7 6ER, UK. Phone: 01 -568 4646. Philip Drake Electronics has South Africa; CBS Mexico; KGC Electronics Inc. The King Instrument Corp which installed a complex studio talkback Magnetics, Australia; Tapecom, Octopus Audio, the Canadian manufacturers audio tape cassette built to BBC specifications, system, Golden recording studio service organisation, loading machines has extended its B Stamford, Connecticut; at the BBC's Glasgow Studio tele- has appointed Frank Morrison to sales and service coverage to all Cassette, Taipei; and PT Metro, vision studio. head its new sales division. Westrex Orient, Aphex has supplied its first Jakarta. Indonesia. Asian countries. Robert Tourkow has been appoint- headquartered in Tokyo, has repre- Aphex II broadcast aural exciter Calrec Audio has just completed ed sales engineer for RTS Systems. sented the company in Japan and units to the following American the installation of a complete formerly with Korea but has now expanded its radio stations: WLUP -FM Chicago; programme sound system for tele- Derek Roughton has operations to cover the additional KDAY -AM Los Angeles; KVIL -FM vision studio B at BBC Manchester's Ferrograph and AKG Canada, countries of the Philippines, Singa- Dallas; and WRKS-FM New York. New Broadcasting House. The con- joined the sales team of AKG pore, Malaysia, Indonesia and Aphex Systems has announced the tract worth £500,000 included instal- Acoustics. the Thailand. In addition to the above sale of its Aural Exciter to the China lation, a 28-channel sound desk, Peter Clark formerly with MCI in Westrex Asia continues to represent Central Broadcast System in the PA system, ancillary equipment and London, has left to become a free- King in Hong Kong and the Peoples People's Republic of China. studio wiring. lance maintenance engineer. Peter Republic of China, while Linfair FWO Bauch recently equipped can be contacted on either 01 -380 Engineering and Trading Ltd, based Radio Aire, the new Leeds ILR 1125 or Epsom 23074. in Taipei, has been appointed as the station, with EMT 948 turntables, People Capital Radio has appointed company's agents in Taiwan. ITC cart machines, and a variety of The Otari Corp has appointed Peter Jackson as its new chief The Travis fader and digital Studer and Revox tape machines, John Carey to the position of product engineer with Clyde Martindill as attenuator produced by Sphere Elec- plus a Studer Telephone Hybrid. manager with particular responsibil- deputy chief engineer. Former chief tronics are to be made available in the Similar equipment has also recently ity for the technical training of engineer Gerry O'Reilly has left UK through London -based distribu- been supplied by the company to Otari's sales representatives and Capital to set up IMCP, a company tor, Feldon Audio. Feldon Audio Centre Radio (Leicester), Chiltern dealer networks. promoting concerts for Independent Ltd, 126 Great Portland Street, Radio (Luton /Bedford), Essex Martin Luddington has been Local Radio.

22 STUDIO SOUND, FEBRUARY 1982

www.americanradiohistory.com For Altec it's all systems go!

Altec, the greatest name in professional loudspeaker systems is now exclusively distributed in the U.K. and Ireland by Rank Strand Sound. The full range of Altec professional live entertainment, cinema and multi -purpose systems and studio monitors, together with separate H.F. and L.F. drivers, loudspeaker units and cabinets for incorporation into your own system layouts, are available. Rank Strand engineers can help you plan and install total sound, lighting, a/v and cinema systems incorporating amplifiers, mixers, projectors and all associated control equipment. For Altec, it's Rank Strand Sound. For you, it's all systems go.

F. Please send full details of the Altec Lansing, Professional Speaker Range. I Name Rank Strand Sound Address P.O. Box 51, Great West Road, Brentford, Middlesex TW8 9HR. Tel: 01 -568 9222, Telex: 27976 A /Back RANKAV L

www.americanradiohistory.com S Windmill Lane, say, is good, with the studios in use for Dublin 80 or 90 hours a week. This follows a policy of £45 an hour A government grant of over £'A clever charging for normal peak rate recording but million for a recording studio - is £20 an hour for demo recording such a thing possible? Yes, in Ireland. with We first reported on Windmill Lane throughout the night, a tape op The get to studios in Dublin two years ago (Stu- engineering. band doesn't keep the tape, so there's no hidden dio Sound, February 1980). Their charge here. The studio provides a 24 -track studio had then been open a cassette or 7Vzin copy. If the band year. Lombard Sound was the first /s wants to issue the demo commer- 24-track in Dublin, Windmill was the cially, they pay the difference (£25 per second. Windmill was opened on hour) and buy the tape. The studio is money raised from the banks by the used for film two three partners, Brian Masterson, also dubbing during when James Morris and Meiert Avis. This hours early each morning, most musicians are still in bed. followed an unsuccessful bid for fi- is why Windmill nancial aid from the Southern Ireland The only puzzle Industrial Development Authority. Lane still has no plans to install a disc room. The upgrade to on -line But after two more years of negotia- Current video editing suite -not yet broadcast standard but soon to be cutting quality video is intended tion Windmill Lane persuaded the upgraded with the help of an Irish Government grant or broadcast to keep pre -production work in IDA that they really were 'manufac- industrial growth in Europe. This has UK, in bills paid for film editing ser- Ireland, because a lot of work now turing' and thus eligible for a capital been stimulated by the generous tax vices. This is because the Dublin handled on film with the aid of British grant to aid further expansion. Wind- relief and capital grants available studio so far only offers off-line lab facilities can in future be trans- mill is now to get 25% of £1.3 million, from IDA. It pays to manufacture in (standard U- Matie) facilities which ferred to video and handled in- house. their original estimate. Although the Ireland; and record, as well. the British and Irish TV companies Windmill their disc cut- estimate has now inflated to £1.5 Windmill Lane finally persuaded won't accept for broadcasting. The But send all ting work to Britain, because there is million the grant stays at the pre- the IDA to come up with the grant £1.5 million improvement scheme will only one facility in Ireland viously agreed level. because the studios had proved they include transfer to a new building in cutting which they seldom use. So why not The IDA is a go -ahead body, set up could survive the hard way. The origi- nine months' time and installation of install a cutting room as well as by the government and financed by nal £%z million borrowed from the lin C- format video and Rank Cintel broadcast video? The answer is that: public money but not part of the Civil banks is still being paid off. They also tele -cine equipment. Currently Wind- too hard to earn money that way Service. The IDA brief, since 1958, convinced the IDA that improve- mill are using an old 35mm projector "It's hard money of has been to stimulate an industrial ments to the Windmill Lane facilities, bought cheap from Windsor Castle - it's even to earn out sound recording." Is this a pointer to revolution in Ireland. Remember that especially bringing the video editing where it used to be used to screen films the other the South has been independent from facilities up to broadcast standard, for the British royals! future for studios? Britain for more than fifty years, and would keep valuable work in Ireland. The sound studio and control room Windmill Lane Studios, 4 Windmill is still predominantly an agricultural Currently around 50% of Wind- remain pretty much as described in Lane, Dublin 2, Eire. Phone: 01- country but Ireland has the fastest mill's vision work turnover goes to the our previous piece. Business, they 713444. Barry Fox

The Chicago Recording record projects, and the rest to com- track room. Even though we anything." There are four Teac cas- Company, Chicago mercial clients, while the four 4- replaced the Flickinger with an auto- sette decks, a high -speed open -reel In many ways, Chicago is a city of track production studios are used mated MCI JH -532 in A, we still duplicator, four Teac open -reel contradictions. It is the third largest almost entirely for advertising, indus- love the old board. It's a discrete machines with 1/4-track heads, two city in the US (Los Angeles beat it trial, and audio -visual work. console, which has all sorts of advan- MCI decks with both half- and full - out of second place only in the last McDonald's, Bisquick, Coca -Cola, tages. One of the reasons we can track heads, and a 35mm mag striper. census), with a thriving folk and Schlitz, United Air Lines, and keep it going is that our chief "All of our MCI stereo machines blues scene, a healthy rock Kellogg's are among the giant corn - engineer, Cleon Wells, was one of have extra mono heads and an extra community, and what is arguably panies that do much of their media the original Flickinger designers." set of electronics ", notes the finest symphony orchestra in the work here, and some of the major Studio A was originally a Hidley Neuberger. "This saves us from country. Yet, little major -label music clients that have passed design, but it has been extensively having to keep dedicated mono recording goes on in Chicago, as through have been Steve Goodman, modified. The original quad machines around, and also from compared with much smaller towns John Prine, The Ohio Players, and monitoring system has been taken realigning every time we switch into like Nashville or San Francisco. Ramsey Lewis. out, and the `duck lips' were mono." In spite of that fact, the city Chicago Recording is the brain- removed from the remaining speakers Studio C was built in August, manages to support a large number child of Alan Kubicka, 31, a local to cut down on dispersion and tight- 1977, and broken up into two 4- of recording studios, some of which, wunderkind who started his own en the imaging. The control room in track post-production rooms, Cl like The Chicago Recording Com- jingle and production company in A is now totally MCI -equipped. and C2, in December, 1980. The pany, can compete in quality and his bedroom at the tender age of 14. "Our supplier, Jerry Milam, tells us suite is in the same building as A and sophistication with the best facilities By the early '70s, Kubicka had built that we have more MCI equipment B, but has a separate entrance at the in the world. How? Well, the a Hidley- designed, MCI -equipped, than anyone else in America," notes rear. This can be advantageous, Chicago metropolitan area is home 16 -, then 24 -track studio on to his Neuberger. The studio features a particularly when all of the rooms for some of the largest consumer - parents home in the Chicago Bosendorfer 92 -key imperial grand are in use, as it avoids that `traffic - oriented corporations in the Western suburbs. In August, 1975, he opened piano, which is a favourite of artists jam in a factory' feeling. The two world, and they just love to make what is now Studio A at the present like Earl `Fatha' Hines and Jerry Studio C's are similar, featuring the commercials. location in the heart of Chicago, Butler. ubiquitous MCI tape decks and JBL "The jingle business supports lots making it the first 24 -track studio in Studio B, where the Flickinger 4311 and Auratone monitors. One of of local musicians ", explains opera- the city. board now lives, was originally set the rooms has a Neotek console, the tions manager and engineer Hank That first room featured a up as a `European' room, with a other a custom board with Omni - Neuberger, "so even though most of Flickinger console, which now Cadac desk and monitors, and a Craft modules. our work is in advertising, we do a resides in Studio B, probably the Studer tape deck. The monitors and The amount of auxiliary lot of local record business with best -equipped 4 -track room in the tape machine are still in place. equipment, much of which floats some great musicians." The two 24- world. "Actually," Neuberger says, Between the studios is a dubbing between the various studios in the track rooms devote about half of "we plan to update B to 24 -track room, in which, boasts Neuberger, building, is breathtaking. The music their time (mostly evenings) to this fall, and add another small 4- " ... we can go from anything to 260.

24 STUDIO SOUND, FEBRUARY 1982

www.americanradiohistory.com X Quietly successful with dbx (from around £20D)

If you're committed to making it in the pro world, give yourself some professional advantages - like dbx noise reduction. The new dbx 150 gives your tape machine the dynamic range of digital perfect drop -ins and de -coded monitor output without special switching. Rack mounting 13/4 inch slimline package means easy upgrading from 2 to 4 to 16 to 24 tracks. Also in this format the new dbx 140 provides two channels of type II encoding and decoding, usable separately or simultaneously for use with cart machines and transmission lines to give a full 40 dB increase in dynamic range.

Scenic Sounds Equipment Ltd France 3M France SA, Mincom Div. Boulevard de l'Oise, 95000 Cergy TeL Paris 749 0275 97 -99 Dean Street Holland Special Audio Products BV Scheldeplein 18. Amsterdam Tel. Amsterdam 797055 London V WI 5RA Sweden Tal & Ton Musik & ElectronicAB Kaempegatan 16, S411 -04 Gothenburg Tel Gothenburg 803 620 Telephone 01 -734 2812/3/4/5 Spain Mike Llewelyn-JonesFrancisco de Rojas 9, 2DER, 9 Madrid 10 Tel: Madrid 4451301 Telex: 27 939 SCENIC G Germany Audio Vertrieb Peter Striìven GmbH Hamburg Tel: Hamburg 5245151

www.americanradiohistory.com Studiofilet Chicago Recording cont'd rooms, according to Neuberger, average about ten limiters each at anyone time, and include units by Allison, UREI, A &D (both Scamp and Compex), Omni -Craft, and some old Fairchild stereo tube limiters. Other equipment includes a full range of Eventide and Lexicon gear, as well as custom built panners and other goodies. Reverb is handled by EMT 140s and 240s, Master Room springs, and AKG BX -20s. There are also several stairways that can be used as live chambers. Dolby is rampant, and Neuberger explains that all of the jingle sessions are recorded at 30in /s with noise reduction. At record sessions, the Dolby is usually pulled out. The microphone collection, as one might expect, is extensive, and features such golden oldies as AKG Cl 2s and C12As, Neumann U47 tubes, and some very rare Neumann U249s. A block away from Studios A, B, and C, located in what used to be a film theatre, are the relatively independent studios D and H, which Control room (inset) and studio D showing drum booth and bassists' platform opened in October, 1980. H is a very well furnished production room, and go. We have instant -start handled by somebody else who can wall of the room is slightly more featuring a Sphere discrete 24/16 machines, so we rarely run into any specialise in that." absorbent, and is used as a `cello console, Altec 604 monitors, and sync problems with a 60s spot. As a The music room in Studio D alcove'. banks of MCI 4- and 2 -track decks. matter of fact, after the rhythm actually consists of two large rooms A set of glass sliding doors and a The engineer sits between the tracks are done, we often don't even and three isolation booths. Furthest set of heavy drapes separates the console and the tape machines, at look at the picture any more. from the console is the string room, string area from the main room, right angles to, and several yards "We try to stay in the audio end a very live rectangular space, with which is trapezoidal in shape. The away from, the overdub booth. The of things, and let the composites be mirrors covering one wall. The rear big room has areas of carpet, wood - producers have a desk immediately tile, and stone flooring, with Now it appears that the service is in front of the glass, so that they can Low-power television extensive trapping in the walls and even further away from realisation communicate directly with the in the US? ceiling. The drum booth is a hemi- than when it was first proposed, and performers without stumbling over octagon, and it is surrounded by a there is a distinct possibility that it the engineer, who whirls around For close to three years, the United bass player's platform. States Federal Communications may not happen at all. Besides the between decks and desk on a "The bass platform was suggested applications from small groups, the wheeled chair. Commission has been trying to insti- to us by one of the bassists who with re- Studio D is Chicago Recording tute a new broadcast service known as FCC found itself deluged works here a lot," explains Company's showplace. The board is low -power television, or LPTV. The quests from corporations like courier Neuberger. "The floor is coupled to service Federal Express and giant a 32 -input Cadac, set up for automa- service would `drop in' a couple of the floor of the drum booth, so that as well as tion, but so far lacking the com- thousand new transmitters, limited in retailer Sears, Roebuck, he can not only hear the drums in his puter. It has 4 -band parametric eq power to 1000W or less, in rural areas evangelical religious programmers, headphones, he can feel them upwards on each channel, eight group currently underserved by conven- some of whom filed for of through the floor." Both areas float over country, masters, six effects sends and eight tional broadcasters, as well as in 200 channels all the separately from the rest of the room. by returns, and comprehensive internal urban areas. It was hoped that LPTV which would be linked together Unlike New York and Los of competing rerouting capability. There are eight would develop into a truly democratic satellite. The flood Angeles, most working engineers in the (count 'em) cue feeds, and the studio broadcast service (a promise that applications paralysed the Chicago area are on staff at the to Commission, even before the has designed a fleet of portable UHF and cable were once thought various studios, and The Chicago mechanism deciding between them mixing boxes so that each musician hold) in that the cost of setting up such of Recording Company is no had been drafted. Even ABC and CBS can set up his own headphone mix, a station would be a small fraction of exception. There are four complete with channel localisation. the millions of dollars required for a joined the fray, hoping to overturn production engineers, five music Existing trans- their exclusion in an eventual court Monitors built in the wall are normal TV station. mixers, five second engineers and which relay the signals of battle. By last April, when the Cadacs and UREI 813 Time lators, apprentices, two full -time current high -power stations to Commission slammed the door on Aligns. There is a Panasonic 3/4in maintenance engineers, and three areas, would be further applications, more than 5,200 video cassette deck with plenty of normally inaccessible secretary /receptionists. the new service, but had been filed, of which only 57 were monitors and Panasonic's video incorporated into "We almost started building a faci- both translators and the new stations uncontested, and hence grantable. controller, which allows for frame - lity in New York last year" says would be allowed to originate their To make matters worse, federal by -frame scrutiny, both in forward Hank Neuberger, "but we decided it own programming. The FCC indica- spending cuts under the new Reagan and reverse. "We don't do any final would be too risky going into a in the granting of economic plan threaten to force the video lock -up here," Neuberger ted that preference market we know nothing about, and licences would be given to minority, FCC to fire nearly 20% of its staff. A explains. "We do have SMPTE capa- where the rents are so high, so we'll non-profit, and educational groups. spokesperson for the Commission bility, but we use it mainly for 46- stay here for the time being." The number of stations that a single says that $100,000 is needed to buy a track audio. Using it on video would The Chicago Recording Company, licensee could apply for was computer program just to sort out the be overkill for us, and we'd have to 528 North Michigan Avenue, unlimited, but the three American TV technical aspects of the applications, pass the costs along to the clients. Chicago, Illinois 60611, USA. networks were barred from partici- but that money is not in the current "When we do post- scoring on a Phone: (312) 822 -9333. pating. budget. Paul D Lehrman film, we just line up the cue marks Paul D Lehrman

26 STUDIO SOUND, FEBRUARY 1982

www.americanradiohistory.com V N T / 0 IS H A M M O N I Z U R ra..v.-y +m.wAv .. ., wN+ww..aw r..w.. 1 MI G...o.

H 949 HARMONIZER Pitch change: one octave up, two down. Delay: two outputs each 393,75 ms. Micro pitch change. Time reversal. Repeat. Randomized delay. Flanging. High and low feedback E /Q. Two selectable algorithms. Frequency response:15 khz. Dynamic range 96 dB.

am ' cc --. Fr=¡y

III0 SW H 910 HARMONIZER FL 201 INSTANT MANGER Pitch change: one octave up, one down. Delay: output one, Simulates true tape flanging, initiated by an internal oscillator, 112.5 ms output two, 82.5 ms. Frequency response 12 kHz. manual control, remote control or envelope triggering. Now Dynamic range: 90 dB. Feedback control. available with the interchangeable B.P.C. 101 card which turns the unit into an instant phaser.

BD 955 BROADCAST DELAY LINE Designed specifically for the broadcast industry and is primarily intended for the policing of live transmissions. There 2830 OMNIPRESSOR are three maximum delay times available 1.6, 3.2 or 6.4 seconds The Omnipressor combines the characteristics of a plus a unique program dump and catch up facility. compressor, expander, noise gate and limiter in one package. .y....l.. «s...... '---4- MO NtTeRMNT JJ 193 DELAY LINE Four outputs, each with up to 510 ms of delay, independently switchable in 2 ms steps. Extra delay is optional to a maximum R.D. 770 MONSTERMAT of 1.022 or 2.046 secs. Frequency response: 12 kHz. Dynamic Mono /Stereo Matrix unit. The Monstermat solves the problem range: 90 dB. of tape phasing and noise on cartridge machines.

ì417,36 `. .' " .N.- VNTID DIGITAL OLAV 31?

1745M DELAY LINE Up to five outputs, each with a maximum of 320 ms of delay (640 ms in the double mode) selectable in 20 p steps. Optional modules available include a pitch changer, and a remote control module which controls the delay line with a microcomputer. Frequency response:16 kHz (8 kHz in `double' mode). Dynamic range: 90 dB.

U.K. Distributors

U Feldon Audio Ltd., Harmonizer, Instant Flanger, 126 Great Portland Street. London WIN 5PH Tel: 01 -580 4314. Telex: London 28668 Monstermat and Omnipressor are trade marks of EVENTIDE CLOCKWORKS Inc

www.americanradiohistory.com Lexicon 224X new In addition to the new Super Prime Time, Lexi- con introduced yet another new unit at AES New York, the Model 224X digital reverb. This unit roductr which is derived from the standard Model 224 digital reverb unit, combines all the features of that unit and adds the following facilities: full Audio Envelope Systems 15kHz bandwidth (8kHz on the 224), a variable Audio Envelope Systems Inc, of Phoenix, bandwidth control (15kHz to 170Hz) allowing Arizona, exhibited for the first time at AES New the 224X to reduce its bandwidth with a natural York, taking the opportunity to unveil two 6dB/octave slope; a dynamic decay facility systems for audio processing. whereby the unit can automatically switch to a The major system is the axrac, a modular rack - different reverb time when the music pauses or mount signal processing system designed both stops, allowing long sustain or decay without for recording or performance applications. The muddying continuous music; a paging system modules are all switchable to optimise impedances allowing the six sliders on the 224X remote and levels, operating at line or instrument levels control panel to be redefined to control addition- to suit the application. RCA phono sockets are al features; and non -volatile register storage and 0.6 to 70s. Lexicon intend marketing and used on the rear of the modules, normalled to extended ROM storage allowing 36 completely supporting both the 224 and 224X and the new /in jack sockets on the front panels, so that the user defined pre -sets to be stored in the non- model will not replace the earlier unit. system provides its own patchbay as the system is volatile register storage, plus the facility to accept Lexicon Inc, 60 Turner Street, Waltham, Massa- built up. An optional extra is a powered 8- at least 32 basic program algorithms in the ROM chusetts 02154, USA. Phone: (617) 891 -6790. position rack frame. A pedalboard is also store. The 224X retains all the standard features Telex: 923468. optional, as is a module case to contain and of the 224 including the capability for field UK: FWO Bauch Ltd, 49 Theobald Street, mains) two modules. power (battery or program updates, true stereo operation (two Boreham Wood, Herts WD6 4RZ. Phone: 01- issue modules The first phase of of axrac inputs and four outputs), and reverb times from 953 0091. Telex: 27502. includes a preamp; paragraphic equaliser; noise gate /compressor /limiter /de- esser; LED bargraph This section includes products premiered The Organizer meter; auto -panner; stereo synthesiser; insert at the November 1981 AES 70th Conven- unit; patch bay; output amp; electronic crossover; tion, New York, and this is indicated in Audio Accessories Inc and Patchways Inc have pedalboard; analogue time processor; and cases. the text where appropriate. Limited space teamed up to produce a novel unit termed the The other unit is the TC 101 [ubecube active dictates that we cannot guarantee to Organizer, a high quality, completely normalled, DI box. This features a valve -sound synthesis cover all such items in this issue. Where rack mountable patch bay. Available in a variety circuit which is also used in the axrac ar -100 items have appeared in this section of standard models and also with the facility for preamp. The principle is undisclosed. The previously, they have not been repeated. custom built models, the Organizer greatly simp- In the unlikely event that we have omit- !ubecube is powered by two 9V batteries or by lifies patching as it incorporates logical signal ted a particular new product from this or flow paths which are clearly marked on the front console phantom power. future issues, we request that manu- Audio Envelope Systems Inc, 2109 West facturers contact us with the relevant panel. The unit can use either tip- ring -ground or Campbell Avenue, Phoenix, Arizona 85015, details as soon as possible, for future XLR 1 -2 -3 wiring; the back panel has clearly USA. Phone: (602) 279 -3613. inclusion. marked terminations with screw terminals and wiring ducts to avoid the usual tangle of cables; lighting via edge-lit plexiglass allows for ease of viewing; headphone monitoring of any point may be accomplished without interrupting the signal flow; and every device connected to the Organizer has input, output and monitor jack access. Although primarily designed with the needs of sound system installations in mind, the system may be customised to meet a variety of applications. Broadcast and communications 30MHz; variation in RF gain IMHz to 30MHz Audio Accessories Inc, Mill Street, Marlow, New ±6dB, 150kHz - 12dB; sensitivity 2MHz to Hampshire 03456, USA. Phone: (603) 446 -3335. receiver 30MHz 5µV /5052 (AM, 6kHz), 0.5µV/5012 (SSB), Surrey Electronics has produced a modified IaV /5012 (FM), 150kHz to 2MHz 30µV/50052 version of the Yaesu FRG7700M synthesised all (AM, 6kHz), 3µV /50012 (SSB), 6µV/50012 (FM); mode communications receiver , modified to make third order intercept point - 2dBm; selectivity AM Studio Optimod the unit suitable for rebroadcast purposes or wide 12kHz -6dB, 25kHz -50dB, AM medium On show for the first time at the New York AES checking transmitter performance in addition to 6kHz - 6dB, 15kHz - 50dB, AM narrow 2.7kHz was the new Orban 424A gated comp /limiter /de- its communications applications. Principal -6dB, 8kHz -50dB, SSB /CW 2.7kHz -6dB, esser, described by the company as 'the studio modifications to the receiver include radically 8kHz -50dB, FM 15kHz -6dB, 30kHz -40dB; optimod'. The device is based on the successful redesigned front -end stages yielding improved stability <±2kHz, < ±1kHz after 30min; broadcast processor, Model 8100A, and offers noise performance and better overload levels; a automatic gain control <2dB for a 65dB increase separate control loops for the comp /limiter and flat audio frequency response on both AM and in input level from - 80 to - 1 5dBm between the IF de -esser sections. The gate features a 'gain - SSB; balanced audio line output; buffered IF and AF outputs; ATT control varies AGC freezing' facility, preventing 'noise rush -up', output for monitoring transmitted modulation threshold; IF output 50mV, min load 2ko; AF line pumping or breathing during pauses in the envelope via an oscilloscope; and improvements in output electronically balanced, source impedance programme material. The de -esser section is the mains safety of the unit. The receiver is 5052, clipping with 6000 load + 14dBm, no offset, similar to the 526,4 unit, and better than 25dB available in free standing or rack mounting format preset output level adjustment range 0 to + 14d Bm de -ess gain reduction is available, in addition to and all the original features of the receiver are for 100% modulated AM signal; AF frequency up to 25dB of comp /limiter gain reduction. The retained including 12 memory channels; mains or response, line output 20Hz to 7kHz ±0.5dB; gain reduction and output meters are both true battery operation option; IF bandwidths 2.7k, 6k overall frequency response, dependent on IF filter; peak reading, and linear or exponential release and 12kHz; digital display of frequency and time; ripple for 30 % modulated AM signal ±1.5dß curves are selectable. Mono or stereo units are squelch facility on all modes including narrow relative to 400Hz; loudspeaker and headphones available. band frequency modulation; advanced noise output 1.5W into 80, 10% THD; memory 12 Orban Associates Inc, 645 Bryant Street, San blanker; and timer facility for unattended channels stored to the nearest 1kHz, memory Francisco, Cal 94107, USA. Phone: (415) 957- recordings or external switching. tuning range ± 1 kHz. 1067. Telex: 171480. Specifications: frequency range I 50kHz to 30MHz Surrey Electronics, The Forge, Lucks Green, UK: Scenic Sounds Equipment Ltd, 97 -99 Dean

in 30 bands of 1 MHz; overspill 40k Hz at either end Cranleigh, Surrey GU6 7BG, UK. Phone: 04866 Street, London W1V 5RA. Phone: 01 -734 2812. of each 1MHz band; noise 10dB, 500, 1MHz to 5997. Telex: 27939. 30

28 STUDIO SOUND, FEBRUARY 1982

www.americanradiohistory.com

NI IF I lJ4111lJ,a1 a I)1 sMq your sound woo tocus. _ 0114 r 1:

Bring your sound into focus,

go_ MINIM MIMIIM .... r _"'s -z= -t - ,,_ _ 111111 - -:,: ...-w ..-. _ all» 0* _.=. -- HIM ' == --. -- ammo

DO D7 G7 DSO MIMMI Mil .1 IMO .NIMMINN..-INO,IIIMMD WNW. 1111111..1..1=1 ...1-MI.11.=NM .11INO...WIND lMMII -....-MIr- MID* MINN -. ----...... - --.-IIM -.. S.S. wr - Bring your sound into focus, . -. -- -=__=-_ r-- ='==--i.-..-_N-wr.___+.rs.Si1 -1-:--. - - J

D9 D7 G7 Dm7 I.AIIM 1 AMt.:t>-.mtwa.mea. mow -mmo- N. V a . -...-...-.- -.. - Bring your sound into focus, :r -,0.._' __ a J ó 0

Aphex II

Dm7 Fm6 G7 Gdim G7 F6 G7 G7+ C C6

J 1 J ; 1J i #.1, . S Axe Available in the U.K. through: Aphex Systems, Ltd. 7801 Melrose AKG Acoustics, Ltd. Los Angeles, CA 90046 (213) 655 -1411 TWX: 910- 321 -5762

www.americanradiohistory.com Gauss introduce studio monitors Cetec Gauss has introduced a new range of studio new monitors to complement its current ranges of loudspeakers, the two models being introduced rocluctf marking a departure for the company in as much that they are the first such monitors produced by the company. Ursa Major remote The first new model, type 7480, uses an 18in bass On show at AES New York for the first time was woofer in a 12.5cu ft enclosure, is a 4 -way system, a remote control unit for the Ursa Major 8X32 and utilises a type 4081 compression driver with a digital reverberator. The compact unit features phenolic diaphragm. Features of this monitor duplication of the main unit's clear and informa- include aligned drive units to minimise time delay tive display functions, offering full control of and phasing problems, and foam panels and reverberation parameters available with the unit. barriers mounted on the loudspeaker baffle to The 8X32 is now available with or without the minimise reflections in the crossover region. remote, which is available separately. In addition, The second new monitor, Model 7350, is a 3 -way an 8X32 may be purchased with a blank front system using a 15in bass woofer in a 6cu ft panel and remote if required. enclosure and utilises the new type 2080 Ursa Major Inc, Box 18, Belmont, Massachusetts compression driver with a constant directivity 02178, USA. Phone: (617) 489 0303. Telex: horn and with power compensation built into the 921405. crossover network. Crossover frequencies for this Gauss Model 7480 UK: Feldon Audio Ltd, 126 Great Portland model are rather unconventional at 200Hz and Street, London WIN 5PH. Phone: 01- 580 4314. 1.6kHz, Gauss claiming that these take advantage 24dB /octave variable, high pass 12dB /octave Telex: 28668. of fundamental music frequencies from one variable; HF crossover 6.3kHz, 24dB /octave 8 x 32 reverb uni loudspeaker for a smoother sound. Both models variable; HF roll -off 2.5kHz, max attenuation use fourth order crossover networks to minimise - 12dB at 10kHz. Model 7350 - nominal frequency dependent radiation pattern tilt due to impedance 482 LF, 80 HF; rated power 400W non -coincident drivers; have HF rolloff controls in RMS LF, 200W RMS HF; sensitivity at 1W at lm, addition to the usual HF level controls; utilise 40 93dB; usable bandwidth 35Hz to 18kHz, -3dB; bass drivers to take advantage of the maximum radiation pattern 90° horizontal, 20° vertical; LF output power from solid state power amps used in a crossover (Bi -amp) 200Hz acoustic, 12dB at bi -amp system; and both are ducted port designs 160Hz, 12dB at 400Hz; MF crossover 1.6kHz, with the port in the base of the cabinet. 24dB /octave variable; HF roll -off 4kHz, max Specifications: Model 7480- nominal impedance attenuation - 12dB at 10kHz. 5 400W RMS LF, Cetec Gauss, 9130 Glenoaks Boulevard, Sun UREI CX encoderldecoder 482 LF, to 8û HF: rated power 300W RMS HF: sensitivity at 1W at lm, 96dB Valley, Cal 91352, USA. Phone: (213) 875 -1900. we feel the Whatever may about compatibility SPL; usable bandwidth 20Hz to 20kHz, - 3dB; Telex: 194989. otherwise of encoded software on non - or CX- radiation pattern 100° horizontal, 30° vertical; LF UK: Cetec International, Unit 15, Northfield Ind equipped replay equipment, there is no CX- crossover (Bi-amp) 140Hz acoustic, 18dB at 80Hz, Estate, Beresford Avenue, Wembley HAO 1YB. when an encode -decode doubt that CX, used as 6dB at 320Hz; MF crossover 1.2kHz, low pass Phone: 01 -900 0355. Telex: 935847. system, gives good results. A professional standard CX encode -decode unit was offered by UREI for the first time at the New York AES. The stereo unit is 2U high and 19in rack - mounting and provides preview, programme and 'audition' facilities in stereo. -A: 92 1 LPP43) The Model 1181 features selectable thresholds, , e., '`l J, i OEM SIN determining the level below which signals are not ' compressed in the encoding process. The CX20 position sets the threshold at -40dB ref OVU (where OVU corresponds to 3.54cm /s groove modulation at 1kHz), while the CX15 position offers a -30dB threshold. Above this level, a Stereo tapped delay reduces the HF content in the feedback signal for a straight 2:1 compression ratio is applied. The Analog /Digital Associates has introduced a new natural decay, plus a regeneration tap selector 1181 offers encoding for both programme and stereo tapped delay, the STD -I, a voltage which selects either tap 1, 3 or 6 as the regenerated preview cutting lathe signals, plus a decoder controlled analogue delay which produces six signal source. The STD -I is fitted with an 8 -step which may be switched between any line level delays simultaneously. A 19in rack mount unit, the LED headroom indicator, while options include input, programme, or preview monitoring. STD -1 is capable of producing effects such as balanced line in /out, voltage control footpedal, Highest -quality tracking between encode and stereo high flanging, low flanging, highly resonant remote dual footswitch for effect and regeneration decode aspects is produced by utilising identical flanging, doubling, multi -voice chorusing, echo, in /out, and a 240V AC power supply. gain -control circuitry in both sections of the unit, reverb, machine gun reverb, multiple doppler Specifications: dynamic range 93dB unweighted; and the mode switching may be remotely effects, vibrato, and `3 -D' spacial placement equivalent input noise - 112dBV; bandwidth, dry controlled if desired. Full metering is provided, which moves the sound source forward and 10Hz to 20kHz, delay 10Hz to 13.5kHz; THD at allowing stereo monitoring of all signals. A backward in the stereo field. Each of the six non - 1kHz dry 0.05% at OdBV, wet 0.55% at OdBV; tamper -proof cover hides the calibration section harmonically related taps can be assigned and inputs 40kû, single ended, '/ in phone jack or of the unit which utilises screwdriver presets and mixed into either of two stereo output channels, 6000 active balanced XLR; outputs two 60052 '/ in LED setup indication with 0.1dB resolution. The the taps not being equally spaced apart or multiples phone jacks or two 6O0û transformer balanced unit may be relay- bypassed by means of an `out' of each other. Delay time of the STD -1 varies from XLRs; max input level +20dBV, 40kû or button, this occurring automatically when power 1.3 to 55.5ms and is continuously variable over a 1 +6dBV, IMQ balanced; max output +20dBm; is off. Encoder noise is given as -95dB to x5 range; sweep rate varies from 0.1 to 25s for a gain range - I5dB to + 27dB; delay time, tap 1 1.3 (programme) and -85dB (preview), while the complete cycle; and a sweep modulation control is to 6.5ms, tap 2 2.2 to 1 Ims, tap 3 4.6 to 20ms, tap 4 weighted decoder noise is also -95dB. THD is provided which can superimpose a higher 5.8 to 29ms, tap 5 8.3 to 46.5ms, tap 6 11.1 to better than 0.107o worst case. frequency sweep pattern over the regular sweep 55.5ms; sweep rate 0.1 to 25s; sweep modulation United Recording Electronics Industries, 8460 allowing vibrato sweeps to random `sample and 0.01 to 0.5s; delay time and sweep speed control San Fernando Road, Sun Valley, Cal 91352, hold' sweeps to be produced. A regeneration level voltage inputs 0 to +5V; control voltage mix USA. Phone: (213) 767 -1000. Telex: 651389. control determines the decay time at long delays output 0 to + 5V. UK: FWO Bauch Ltd, 49 Theobald Street, (up to 15s) and the amount of resonance at short Analog /Digital Associates, 2316 Fourth Street, Borehamwood, Herts WD6 4RZ. Phone: 01 -953 delays (up to + 12dB). Also provided is a high cut Berkeley, Cal 94710, USA. Phone: (415) 548 -1311. 0091. Telex: 27502. control adjustable from 12kHz to 800Hz which

30 STUDIO SOUND, FEBRUARY 1982

www.americanradiohistory.com TRA le7

Marshall 5002 Time modulator £700.00 Sennheiser MD 421 New each £60.00 Sound Workshop 262 Spring Beyer M260 New each £68.00 reverb (new) each £350.00 Boom stands from £15.00 Tannoy 15" Golds as new each £100.00 Roland DC10 Analog echo £120.00 Tradeq Spring reverbs with limiters new mono £100.00 Lyrec 16 -1 Cassette duplication unit stereo £200.00 master and 4 x slaves £8,000 Decca Master Room CSREQ 23 Reverb £800.00 duplication desk, phasing scope, etc. £800.00 Otari semi automatic cassette loaders each £1,000 Bluthner Grand Piano £1,850 2" tape 101/2" reels at empty reel price each £10.00 AKG Mics: D190e New each £36.00 Selection of Scamp and Rebis racks, D202E1 New each £66.00 modules in stock P.O.A. D12E New each £67.00 Neuman M49 P.O.A. D224E New each £98.00 Neuman KM54 P.O.A. D772 New each£62.00 Neuman U48 P.O.A. D310 New each £38.00 R.C.A. BX77 P.O.A. D51 D511 B Talk back mics New each £20.00 R.C.A. BX44 P.O.A.

A selection of used equipment available from our showrooms r 7 Lyrec 24T T /Rec with 30 memory Neve 32 -24 -24 Mixing console £30,000 autolocate £13,000 Neve 32 -16 -24 Mixing console £23,000 Lyrec 24T T/ Rec with A/ Locate £11,000 Soundworkshop 1600 28 -24 Automated 3M M79 24T T /Rec with Sonoplan Mixing console -3 months old £18,000 A/ Locate £11,000 Teac 5 8 -4 Mixer £500.00 3M M79 24T T /Rec with 16TH / Block £11,000 Alice 828 8 -2 Mixer - "mint" with extras £500.00 Ampex MM1200 24T T /Rec with Decca 12 -2 Large desk, Phasing scope etc. £2,250 zero locate £10,500 P.E.P. 12 -4 -8, as new with remotes £1,850 3M M79 16T T /Rec £8,500 3M M238TT /Rec £2,750 Dolby M16H noise reduction each £5,000 Scully 8T T/ Rec £2,500 Dolby M24H noise reduction each £7,000 Scully 8T T/ Rec with syncmaster £2,900 Dolby a360 noise reduction each £280.00 Teac 3440 4T T/ Rec £600.00 Scully 4T T/ Rec with DC motor drive etc. £1,900 JBL L200 Loudspeakers £1,000 MCI JH110 Stereo T /Rec £1,800 JBL 4331A Loudspeakers £900.00 Ampex AG440B Stereo T /Rec £1,000 2 x Pultec EQP 1A3 Prog 'EQ' £450.00 Studer C37 T/ Rec- Stereo £600.00 Teletronix LAZA Level amp. £220.00 Studer A62 Stereo T/ Rec £750.00 Leevers Rich E200 Stereo T /Rec £400.00 Quad 405 amp £175.00 Quad 50E amp each £60.00 Trident B 24 -16 -16 Mixing console £6,000 DBX 155 Noise reduction £200.00 Trident B 24 -16 -16 Mixing console £5,000 DBX 122 Noise reduction £220.00 MCI JH43636 -24 Mixing console £15,000 Synton 722 Vocoders (New) each £350.00 I ELECTRONICS SALES LTD TRAD 149b. St. Albans Road, Watford, Herts, WD2 5BB, England Tel: Watford 47988/9 Telex: 262741

www.americanradiohistory.com facilities for remote increase of sensitivity by + 12dB, plus the MEG 300 PPM which has a VU -type scale and a remotely controlled extra sensitivity range of +20dB. All the new meters employ special LED lamps having diffusing reflectors which provide a continuous light column with colour changes according to the EBU standard.

For address details see product guide

ALD -12 audio level display American manufacturer Project Synthesis Inter- ic national has introduced the ALD -12 audio level display, a new three -colour LED -column level indicator with electrically selectable VU or PPM characteristics. This new meter operates from 10 to 35VDC single or bipolar supplies; features balanced or unbalanced 47KS2 input, DC- isolated to 50VDC; and uses a wide-angle visibility moving -point format with increased drive current to attract operator attention. The meter's characteristics include a 12ps peak capture; a response of 18Hz to 22kHz ±0.5dB; and a permanently calibrated accuracy of ±0.3dB at 1kHz. An additional facility is the provision of an amber `Clip' indicator which flashes whenever level exceeds a value preset by the user. The ALD -12 is available as a plug -in module which mounts in standard card racks or panels, or Bowmar analogue panel meters alternatively 2 -, 8- and 16-channel complete Sifam Presentor meters Three new series of solid state analogue panel display systems in enclosures with power supplies Sifam has developed a new range of panel meters, types APM 500, 600 and 700, have been are available. meters, termed the Presentor range. The new introduced by Bowmar /ALI. Designed for high meters combine the presentation characteristics visibility and readability, the meters feature of the established Clarity, Clarity Focus, Direc- bright 51- segment bargraph displays; a rapid tor and Monitor types in one meter, adaptable 2.5ms response (full scale); and low power for back -of -panel presentation or front -of -panel requirements. The series are available in voltage with mask or bezel. The meters utilise a core - or current types, models that accept 7 -bit binary magnet movement design and are available in signals, or AC meter types. Model options four sizes with scale lengths of 34, 60, 78 and include centre-zero, voltmeters or ammeters, 100mm. The range is suitable for use on DC control or alarm outputs, single or dual setpoints, supplies up to 600V and from 50mA upwards. flashing bargraph, damping, differential input, The four sizes are designated 19, 29, 39 and 49 high input impedance, and yellow or green with the suffix letters W, M or B signifying the bargraph display. Standard bargraph display presentation style. The meters are fitted with colour is red. knife -edge pointers; dial markings are available for zero left -hand, right -hand or centre; all except the smallest size can have illuminated dials Miniflux bargraph meters provided by back -lighting throug'" the translu- Miniflux Electronics has introduced a new series cent body, and may be fitted with mirror dials; of light column indicators which meet the revised and a zero adjustor is fitted which may be posi- EBU standard relating to PPMs, EBU 3205 -E tioned at the rear if required. All front -of -panel 2nd Edition November 1979. Three meters are types only require a 27mm diameter cut -out, plus available, the MEG 360 (2- channel) and MEG holes for fixing studs. Accuracy of the Presentor 330 (single channel) units which incorporate is claimed to be to BS89, IEC 51 and ANSI C39.1; typically f1 1/207o for scale lengths of 50mm and above, or ±2'/ % for lengths less than 50mm. l STEREO DISC AMPLIFIER 2 THE MOST THOROUGHLY RESEARCHED DISC AMPLIFIER THERE IS Efor broadcasting, disc monitoring and transfer with the highest quality i,I 1 kHz at 5mV set for OdBV.7 output. Loaded 600 ohms. Total harmonic distorticS J4' Cartridge impedance interaction on frequency response High inductance cartridge, 1H + 1k0 Less than 0.2dB Output + 10dBV.7 30 Hz -21... U r, below noise 1 0.004% Output +20dBV.7 kHz 0rt r ° Clipping at 1kHz Output +24d BV.7 30Hz-20kHz vD >° ' Clipping point complementary to RIAA curve Static intermodulation distortion SOI4i + 0,V 30Hz -20kHz Within 1dB Output -90dB' u.. determined by onset of peaky distortion products 3.18kHz squat, -sing Dynamic intermodulation distortion À eeding -80d0. wave (single pole -3dB at 100kHZ) + 15kHz sine wave, 1 y 4:1. Relative to 15kHz components. Differs.. A shift Pre -emphasised input 500mV pk -pk -70dB, 0.03% 50Hz -20kH, Y Within 0.5° Frequency response RIAA accuracy Worst error at Li- 81 z-,-,, Within 5° Within 0.5dß turnovers 30Hz -20kHz ! Sj .1.v Ring or write for full specifications of this or: 10 Outlet Distribution Amplifier 3 Moving Coill - mplifier Stabilizer Frequency Shifter Circuit Boards PPM Drive Circuits and Ernest Turner Movements PPM Boxes Peak Deviation Meter Programme and Deviation Chart Recorders Broadcast Monitor Receiver 150kHz- 30MHz. Surrey Electronics The Forge, Lucks Green, Cranleigh, Surrey GU6 7BG. Tel. 04866 5997

32 STUDIO SOUND, FEBRUARY 1982

www.americanradiohistory.com BROADCASTING VERSATILITY The fully modular, Wide selection of input modules Self- operation or engineer driven expandable Series 24A capability stereo mixing console EQ available (if required) on mono and stereo inputs The Series 24A with its wide choice of Sophisticated metering and modules and variable frame size permits monitbring the console to be used in a range of Equipment remote starts functions including 'on -air', production, Comprehensive talkback and outside broadcast, drama, network intercom switching, audio visual production etc. Logic controlled telephone -in and o.b. modules All inputs and outputs fully mbi studio construction balanced A cost -effective turnkey service incorporating: Architectural and Interior Design (with RIBA supervision of builders)

Acoustic Design and Construction

Studio Equipment Selection and Installation Consultancy, construction, installation and commissioning -an effective, integrated facility.

Economically priced, ergonomically built Meets or exceeds broadcast authority

specifications .. . mbi boadoe: $111$tcms It 69 Ship Street, Brighton, England, BN1 1AE Tel :10273) 24928 www.americanradiohistory.com VU Mini -Meters: low cost microammeters with VU UK: Neve Electronics International Ltd, Cambridge scales, suitable for portable equipment. House, Melbourn, Royston SG8 6AU. Phone: 0763 Fluorescent Bargraph Peak VU meters. 60776. Telex: 81381. USA: Rupert Neve Inc, Berkshire Industrial Park, CROMPTON (USA) Bethel, Conn 06801. Phone: (203) 744 -6230. Telex: See Ernest Turner /Crompton 969638. DIXSON (USA) Multichannel Monitor/Spectrum Analyser: modular TV Dixson Inc, PO Box 1449, Grand Junction, Colorado rack -mounted unit providing colour display, switch - 81501. Phone: (303) 242 -8863. simultaneous 56 audio channel monitoring able to spectrum analysis of any single channel, to PPM or VU. VU meters: range of analogue meters. bargraph level indication switchable ALICE (UK) ESE (USA) Alice (Stancoil Ltd), 38 Alexandra Road, Windsor, Ese, 142 Sierra Street, El Segundo, Cal 90245. Berks. Phone: 07535 51056. Telex: 849323. Phone: (213) 322.2136.

PPM775: PPM drive circuit for analogue meter ES211, ES214: 14 -LED column level indicators. movements. INOVONICS (USA) ALPS KEIKI Inovonics Inc, 503 -B Vandell Way, Campbell, Cal UK: Servo and Electronic Sales Ltd, 24 High Street, 95008. Phone: (408) 374-8300. Lydd, Kent TN29 9AJ. Phone: 0679 20252. Telex: UK: Feldon Audio Ltd, 126 Great Portland Street, 965265. London W1 N 5PH. Phone: 01- 5804314. Telex: 28668.

VU meters: analogue meters standard 6000 circuit Gordon Headroom Meter: peak reading audio level in series. indicator, responds to peaks as PPM (UK /EBU standard, BS4297: 1968) but has 'VU- style' A & R (UK) ballistics for easier reading of the display. GHM -00 Amplification & Recording (Cambridge) Ltd, Denny is a complete metering system including meter and End Industrial Centre, Waterbeach, CambridgeCB5 electronics; GHM -01 is retrofit electronics kit for 9PB. Phone: 0223 861550. standard VU meter, with additional VU /PPM switched characteristics. Electronics assemblies PLM14: LED column level indicator; switchable VU may be meter or rack -mounted. or PPM characteristics; 38dB dynamic range. MC16:channel case and power supply for 16 PLM14 modules. NTP 277-500 stereo display unit

AUDIO & DESIGN (UK) Audio & Design (Recording) Ltd, North Street, Reading, Berks FiG1 4DA. Phone: 0734 53411. Telex: NTP (Denmark) 848722. NTP Elektronik AIS, 44 Theklavej, DK -2400 Copenhagen NV. Phone: 01 10.12.22. Telex: 16378. Scamp S14: LED display with four 12- section PPM columns; ±10dB calibration characteristics 177-210/300/310: light spot PPMs, self contained modifiable to VU. with built -in log amps and input transformers. 177. 400/410/800: gas discharge display stereo PPM BACH- SIMPSON (UK /Canada) with 100 individual orange elements. Bach -Simpson (UK) Ltd, Trenatt Estate, 177.700B/710: LED column mono PPMs with 64 Wadebridge, Cornwall, UK. Phone: 020881 2031. LEDs. Telex: 45451. 177 -750/780: LED column PPMS with 24 LEDs. Bach -Simpson Ltd, PO Box 5484, 1255 Brydges 177 -900/950: gas discharge stereo VU meter with Street, London, Ontario, Canada. Phone: (519) 950 has one VU Gordon Headroom Meter 100 orange elements in each bar. 452-3200. Telex: 064 5843. column and one PPM column. USA: Simpson Electric Company, 853 Dundee M -900: analogue PPM using Sifam movement with Avenue, Elgin, Illinois 60120. Phone: (312) 697 -2260. electronics contained on back of meter mounted Telex: 722416. PCB. JEWELL (USA) M- 920/177 -600: analogue PPM using edgewise Wilbac, Excalibur and Designer ranges: analogue Field, movement. construction. Jewell Electrical Instruments Inc, Grenier VU meters with instrument Manchester, New Hampshire 03108. Phone: (603) 277 -100: 8- channel PPM based on 200 -element bar - 669 -6400. graph plasma displays. BOWMAR (USA) 277-500: stereo display instrument based on 70mm Bowmar /ALI Inc, 531 Main Street, Acton, VU meters: range of analogue meters. CRT. Massachusetts 01720. Phone: (617) 263.8365. 377 -500: video PPM superimposing meter scale on McCURDY (Canada) side of a TV picture to provide level indication. solid state analogue APM 500/6001700: series of McCurdy Radio Industries Ltd, 108 Carnforth Road, 377 -100: multichannel PPM displaying up to 28 panel meters. Toronto, Ontario M4A 2L4. Phone: (416) 751.6262. channels on colour TV monitor. 506 -100: 1/3- octave analyser for 377-100. (USA) Telex: 06963533. BURROUGHS USA: McCurdy Radio Industries Inc, 1711 Carmen Burroughs Corp, PO Box 1226, Plainfield, New Drive, Elk Grove Village, Illinois60007. Phone: (312) PSI (USA) Jersey 07061. Phone: (201) 757.5000. 640 -7077. Telex: 910 -222 0436. Project Synthesis International, 561 Carrick Court, UK: Walmore Electronics Ltd, 11 -15 Betterton UK: Seltech Equipment Ltd, Rose Industrial Estate, Sunnyvale, Cal 940787. Phone: 9408 733-0065. Phone: Street, Drury Lane, London WC2H 9BS. Cores End Road, Bourne End, Bucks SL8 5AT. 01 -836 1228. Telex: 28752/25177. Phone: 06285 29131. Telex: 848960. ALD -12: LED column level indicator using 12 LEDs in three colours. Self -scan Bargraphs: high readability gas plasma PPM02: peak programme meter movement with neon orange vertical bargraph display devices with electronics on rear mounted PCB. RACAL /BPL (UK) segments. Dual -Reset bargraphs allow reading of Racal- British Physical Laboratories, Radlett, Herts set points and actual measurement. MINIFLUX (UK) WD7 7HJ. Phone 09276 4844. Telex: 25312. Miniflux Electronics Ltd, 8 Hale Lane, London NW7 CAPITAL COMPONENTS (UK) can supply VU 3NX. Phone: 01 -959 5166. Wide range of analogue meters and Capital Components, 28 East Street, Rochford, meters to order. 1 547252. Essex SS1 PY. Phone: 0702 MEG Series: range of LED peak level column UK: Cliff Electronics Ltd, 97 Coulsdon Road, indicators using separate close coupled large REBIS (UK) Phone: 0883 47713. Caterham, Surrey CR3 5NF. diameter LEDs in a vertical column. Rebis Audio, Kinver Street, Stourbridge, West Telex: 8813346. Bargraph meters: light column indicators meeting Midlands DY8 5AB. Phone: 0384 71865. revised EBU standards. 12- 20- LED Bargraph visual displays: or segment RA2071RA207R: 20-LED column meter with switch - column level indicator; bar or segment display; MODUTEC (USA) able VU and PPM characteristics. 207R has switch PPM or VU with optional peak hold. switchable Modutec Inc, 18 Marshall Street, Norwalk, Conn for remote selection of VU /PPM. VU with semicircle of 11 LEDs. meters: 06854. Phone (203) 853 -3636. SEW (Japan) COMPONEX (Japan) VU meters: range of analogue meters. UK: ITT Instrument Services Edinburgh Way, 26811. Componex Ltd, 48 -56 Bayham Place, London NW1 Harlow, Essex CM20 2DF. Phone: 0279 OEU, UK. Phone: 01- 388 7171. Telex: 27364. NEVE /CHROMATEC (UK) Telex: 81146. Chromatec Video Products Ltd, 10 Barley Mow in two styles Regal, Kestrel and L ranges: analogue VU meters, Passage, London W4 4PH. Phone: 01-994 6477. VU meters: analogue meters available some available as PPMs. Telex: 8811418. and a number of sizes. 36 0.

34 STUDIO SOUND, FEBRUARY 1982

www.americanradiohistory.com +1 n]

Mks. OUTPUT DU4L

;4. ' A. 0w;EDUCTtON SIO iN . . . 4' .

C '4 CMAIINFL ONE

oro time on your _ .,..Inds ._ ..; r' T) 41y-- - mMXR., .- .-!- - PQEflR SIP

..wnNNll . -

Providing extended delay times at an The Delay System II fits right into your ra off gable price, the new MXR Model 151 looks great and provides clean, noise -fr

System I I gives you over three full performance. A revel switch is provided t seconds of delay (three times that of simi- optimize signal -to -noise for professional larly- priced digital devices). Specifically. home recording and onstage application the Delay System II can offer you up to The Delay System II also features easy 800 milliseconds of clean, quiet delay at access with both XLR and phone jack a full 16 kHz bandwidth (over 200 millisec- connectors (inputs and outputs) on the onds more than the closest competitor). rear panel for instant interfacing with yo_

As a digital recorder, the Delay System I l's patch hay. exceptional memory capability lets you MXR Delay System II-More time on yo capture entire musical phrases or obtain hands and more ways to use it as a crea a wide var ety of dynamic and musical tool on stage and in the studio. Hand - studio -quality effects from flanging and assembled in the U.S.A. with the finest chorus to echo and doubling in one rugged components available in a compact, eas package. to -use rack -mountable package. And its easy to use in real time. The large front panel and simple control format make it a snap to quickly select from a vast range of time delay effects. The Delay System II s Professional high -resolution four digit readout displays Products Group the precise amount of delay and the bandwidth is indicated by LED's, so there's no MXR Innovations (Europe), "squinting & thinking" to find out exactly 1 Wallace Way. where you are. Level- indicating LEDs let Hitchin, Herts. SG40SE Eng. Phone you set up the optimum level in seconds. 0462 31513 Tlx 826967

e 14/011111MI/t.I DEL AV 6V ® J ! a IN fh .® wCTM [lE Lt AL . `,/ (1111'. 01 - x om. e --DELAY gT (MXR) thirty-one . es us P. M to . mm um 30 E f. [ II init. a mums a V r mums n r----" ; é IN OUT ._i_ _ _ e_ s - - _1-1 r - - r_ - - E = E -

~LEVEL)

VMXR) thirty -one ba ' d .;4; 51 SW á li'.5,'J 21+ 1N/OUT

www.americanradiohistory.com ERNEST TURNER /CROMPTON (UK /USA) Ernest Turner Instruments, Totteridge Avenue, High Wycombe, Bucks. Phone: 0494 30931. Telex: 83444. USA: Crompton Instruments Inc, 1562 Parkway Loop, Tustin, Cal 92680. Phone: (714) 731 -2333.

VU meters: wide range of analogue meters conforming to ANSI C16.5 -1954. Peak programme meters: wide range of analogue meters with scaling and performance conforming to BS4297. SIFAM (UK) Twin PPM: similar to standard PPM5 but twin movement with separate pointers on same dial. Sifam Ltd, Woodland Road, Torquay, Devon 102 TAY. Phone: 0803 63822. Telex: 42864. USA: Selco Product Co. 7580 Stage Road. UREI (USA) Buenapark, Cal 90621. Phone (213) 921 -0681. Telex: United Recording Electronics Industries, 8460 San 655457. Fernando Road, Sun Valley, Cal 91352. Phone: (213) 767-1000. Telex: 651389. Monitor range: analogue VU meters available in UK: FWO Bauch Ltd. 49 Theobald Street, Boreham three sizes. Wood, Herts WD6 4RZ. Phone: 01 -953 0091. Telex: Director range: analogue VU and PPM (requiring 27502. external electronics) meters in four sizes. Clarity and Clarity Focus ranges: analogue VU and Model 70 Vidigrat: 16- or 32- bargraph display PPM (requiring external electronics) meters in generator using TV monitor. several sizes. Made with modified spec with heavier damping and faster rise time than standard. WESTON (USA) Presentor: panel meters combining characteristics A range of meters offered by Ernest Turner Instruments, 614 Frelinghuysen Avenue, of other three types. Weston Newark, New Jersey 67114. Phone: (201) 242.2600. 4 Industrial SOUNDEX (UK) UK: The Radio Resistor Co Ltd, Trust Estate. Wilbury Way, Hitchin, Herts SG4 OTN. Park Lane, Ltd. 49 Theobald Street. Boreham Bulgin Electronics Soundex Ltd, UK: FWO Bauch Phone: 0462 4072. Telex: 826251. Broxbourne, Herts EN 10 7NO. Phone: 09924 64455. Wood. Herts WD6 4RZ. Phone: 01 -953 0091. Telex: 27502. 7500 Series: analogue VU meter movements. PPM 100 Series!BS5428: PPM meters incorporating USA: Studer Revox America Inc. 1819 Broadway, Ernest Turner and Sifam analogue movements and Nashville, Tennessee 37203. Phone: (615)329 -9576. Soundex electronics. meeting BS5428 specs with Telex: 554453. WESTREX (USA) BBC -style 1 to 7 scale. Westrex, 2629 West Olive Avenue, Burbank, Cal PPM 300 Series /DIN 45406: PPM meters Dual programme meter dual plasma display meter 91505. Phone: (213) 846 -3394. Telex: 698254. incorporating Sifam analogue movements con- with 200 segments: PPM or VU characteristics: UK: Westrex Co Ltd. Bilton Fairway Estate, Long forming to DIN 45406 standard. console or rack -mounted. Drive. Greenford. Middx. Phone: 01- 5780957. Telex: PPM 400 SerieslSoundex Standard 400: economy 923003. standard range of PPM meters. SURREY (UK) Surrey Electronics, The Forge, Lucks Green, RA- 1558B: light bar recording meter with 42in STUDER (Switzerland) Cranleigh, Surrey GU6 7BG. Phone: 04866 5997. horizontal scale, ideal for film dubbing and theatre Studer International AG, Althardstrasse 150, applications. CH -8105 Regensdorf. Phone: 01 840.29.60. Telex: PPM2: PPM drive circuit for analogue meter Large projection meters: VI or VU analogue audio 58489. movement. meters projecting image on to 24 x 12in face. bei FROM ABBEY ROAD STUDIOS TO ZELLA STUDIOS - YOU'LL FIND BEL EQUIPMENT WORKING EVERYWHERE

50 Chetpude, Luton, lieds. TN. Luton 10562) 28893 or 27195 deyhnN. Ampth,ll 105251 403528 evenings TeN, 825488 DONLAR

BEL. Agents ITALY Professional Equipment, 20135, Milano, Via Anfossi, 6, Italy. Tel: 02 8353514/02 581650 HOLLAND Professional Audio Centre (P.A.C.), Strijpsestraat 94, 5616 GS, Eindhoven, Holland. Tel: 040 520662 W.GERMANY Peter Struven GMBH, Bargweg 45b, 2000 Nordestedt, Hamburg, W.Germany. Tel: 040 524 5151 DENMARK Audiopower, Smaaland 1,2300 Copenhagen S, Denmark. Tel: 571223 SWEDEN Stage and Studio AB, S:T Olofsgatan 35, S -41728 Gothenburg, Sweden. Tel: 031 224090 U.K. S.E.S. 100 Hamilton Road, London N.W.11. Tel: 01 -458 9133 MUSIC LABORATORY 72 -74 Eversholt Street, London N.W.1. Tel: 01 -388 5392 Turnkey, 8 East Barnet Road, New Barnet, Herts. Tel: 01 -440 9221

36 STUDIO SOUND, FEBRUARY 1982

www.americanradiohistory.com eece Z e e e Q1`,P,AEJj

VERY QUIET MIXERS

Stereo limiters, full talkback and monitoring facilities, sweep oscillator, 48v phantom power.

From 4 to 20 channels, two group or stereo output, standard or conductive plastic faders, VUs or PPMs.

(STANCOIL LTD.), Alexandra Road, Windsor, England. Telephone Windsor 51056/7 Telex AEGIS G 849323.

www.americanradiohistory.com Acoustic test signal generator American manufacturer, Hall Engineering has introduced a new acoustic test signal generator, the Model ATG -301, suitable for applications such as adjusting equalisers, optimising loudspeaker placement, and testing loudspeakers. The generator can provide white noise, pink noise and finite bandwidth (fractional octave) For address details see product guide pink noise with variable frequency and bandwidth. In the finite bandwidth pink noise mode Radio transmission test system the centre frequency can be varied continuously A system developed in Australia has been from 20Hz to 20kHz in three overlapping ranges. produced which can perform standard audio Bandwidths of 1, ;., ;, #, or yr- octave can transmission tests for a television or radio station be selected; output level can be varied from in just 3.7s. Until now such tests involved a OdBm (relative to 600Q) to below -40dBm; and skilled audio engineer using complex test equip- locked to a crystal. The unit also has facilities for the unit is mains powered (120VAC). ment for long periods of time. Developed by external control via an IEEE 488 buss controller Amalgamated Wireless (Australasia) Ltd, the for amplitude, function (sine or squarewave) and S / /00 system will cover 43 audio transmission frequency. Frequency accuracy is claimed to be lest parameters for mono. stereo, AM and FM ±IOPPM when used via the buss or with the sound. Whereas manual testing is prone to error, front panel thumbwheel switches. The signal 20V the .S /100 automatically follows the selected generator features unbalanced outputs of sequence of tests with microcomputers calcula- peak to peak into open circuit and 10V peak to Iing and presenting the results in the required peak into 500, plus a 3.5V RMS balanced form. rest results, time, date and generator output into 6000 and a front panel TTL output. source code data are stored within the receiver An additional rear panel TTL output is also and these can be presented as a printout or provided at 120 times selected frequency. iransmined via the data interface. Using only Second new unit is the DTVI2 -14 12MHz one generator and the necessary receivers, the oscilloscope, a dual trace unit with an 8 x 10 system can test an entire transmitter network and division screen. This unit features a fully variable ii can operate between countries as it can be timebase between switched positions; fully remotely controlled by telephone link or satellite. variable gain control and sum and invert facility; and a fully passive attenuator. The final new unit from Farnell is the TMIO battery powered `through -line' power meter with single detector head. This meter has a frequency IET true RMS voltmeter response of 25MHz to 1GHz and can display American manufacturer IET Labs has introduced power levels from 20mW to 100W. a new true RMS voltmeter, the Model MV -800, capable of measuring the range -105dB to + 53dB. The meter features 15 ranges from 30µV Goldline audio spectrum analysis full scale to 300V, and from -90dB full scale to systems +50dB in decades. Other features include Anglia CB Ltd, an associate company of Webber rechargeable battery operation; separate AC and Tapes Ltd, has introduced the American manu- DC outputs; a front panel bandwidth switch factured Goldline range of audio spectrum allowing a choice of wide band measurements, analysis systems to the UK. Three systems are standard first order audio bandpass (20Hz to available, the ASA -10 and ASA -10B hand -held, 20kHz), or external filter; and a range of stand- battery -powered, spectrum analysers and the ard or custom plug -in bandwidth filter modules ASA -10C 19in rack -mount realtime analyser. All to accommodate specialised measuring functions. Bach -Simpson test equipment the units are 10- octave spectrum analysers and feature LED matrix displays, with the ASA -I0 Bach -Simpson (UK) Ltd has introduced a new having a measurement range of 65 to 100dB function generator, the Model 420. The new SPL, the other units having a measurement range Kikusui oscilloscopes generator provides sine, triangle and square of 3:0 to 123dB SPL. Centre frequencies of the Japanese manufacturer Kikusui, who produce a waveforms, DC and TTL output and covers analysers are 32, 63, 125, 250, 500Hz, 1 k, 2k, 4k, wide range of test instruments and in particular a 0.IHz to IMHz in seven ranges. Other features 8k and 16kHz. The ASA -10 features IEC A- wide variety of oscilloscopes, has announced the include voltage controlled generator input for weighting, while the others additionally offer introduction of two new oscilloscopes, Models sweep; continuously variable DC offset with off IEC C- weighting. position; and rechargeable battery operation 40 allowing the unit to be used as a compact portable signal source. A second new unit from Bach -Simpson is the Model 461 -2R true RMS digital multimeter which measures AC /DC voltage, current, and Rycote Microphone Windshields resistance over 26 ranges. Features of the multi - meter include HF response to 50kHz; overload protection to 750V; and rechargeable battery MAY WE INTRODUCE OUR powering. LATEST IMPROVEMENT The windshield now slides on and off the suspension assembly New Farnell test instruments without any fiddling with screws or lining up holes. Parnell Instruments has added several new test We've cut a slot along the windshield. instrutents to its range or test equipment. First Hey presto - now you can remove or replace the new unit is the fully bussable DSG2 digitally windshield in seconds. synthesised signal generator with a frequency A good improvement - no alteration in price - progress. range of I x 104 to II x 104Hz. This unit SENNHEISER N generates its wavcshape in 120 steps by means of AKG a PROM which is controlled via a VCO phase NI yes -its begat/hi//y made -as issue/ Etc Rycote Microphone Windshields, New Mills, Slad Road, Stroud, Gloucestershire GL51RN, England.Te1.0453679338

38 STUDIO SOUND, FEBRUARY 1982

www.americanradiohistory.com Alangrove - the most comprehensive acoustic design and construction team in the world! Video studios, 1V studios, AV theatres, recording studios, cuffing rooms, remix studios- in fact Alangrove have constructed more studios world -wide than any other European Company - each perfect to the last brick.

OEAlangrove Builders Ltd 9 Lancaster Mews, Hyde Park, London W2 3QQ Tel: 01 -402 7071 262 8157 Telex 261705 US Agent: Bob Gross, Box No 99 Antrim, New Hampshire, 03440, USA Tel: (603) 588 2821

Past projects include over 70 Eastlake Rooms, 6 Sierra Audio Rooms and the entire Molinare Video Complex in London. Alangrove also designed and re -built the Electric Lady Studio, New York; the control room and studio for Kenny Rogers in Los Angeles in conjunction with Lakeside. Other constructions include 4 music rooms for Trafalgar, video facility at Tube Investments, control and studio for Atlas Photography. Present projects include 'live' rooms at Studio 1, Maison Rouge, London. The design and construction of Molinare video editing rooms at Craven House; Frank Farion, Far -Ton studio, Frankfurt. All room guarantees honoured on approval of plans. We also give fixed cost to all designs.

www.americanradiohistory.com having an internal graticule provides graticule triggering an oscilloscope; and a variable DC illumination via a separate external graticule. offset facility enabling up to ± 10V to be super- The Model 5531 is a dual channel 35MHz imposed on the main output signal. oscilloscope offering 5mV per division sensitivity at 35MHz with a Y magnifier on both channels giving lmV per division at 15MHz bandwidth. The 5531 has two time bases giving sweep modes of A, A intensified, and B. The instrument also For address details see product guide incorporates an uncalibrated trigger delay. Other features include automatic, alternate chop 5650 and 5531. The 5650 is a 50MHz dual (200kHz) and chop only mode; one touch trigger channel oscilloscope with dual time base and delay; variable hold off; one touch XY operation, features calibrated sweep delay of the vertical internal graticule; and a high brightness (non - Wayne Kerr AMS1 amplifier at 5mV per division with the capability illuminated) CRT. Wayne Kerr recently introduced a new audio of lmV per division sensitivity at a restricted measuring test set, the AMS1, designed to bandwidth of 10MHz. Other facilities include provide all the test facilities a recording studio alternate time base, alternative trigger, 500kHz Level) test instruments could require at a reasonable cost, ie under New from Level) Electronics Ltd is the TMIO £1,000. The new unit, which is a compact piece electronic null detector with two logarithmic of equipment yet remarkably comprehensive and ranges enabling null detection to be made very logically laid out, includes facilities to make throughout an 80dB change of voltage level over 15 different types of measurements. The without range switching. On the mV log range facilities provided include a low distortion ±10% FSD equals ±50V; ±50% FSD equals oscillator; multi- frequency distortion meter; ±5mV; and ±100% FSD equals ±500mV. In multi- frequency crosstalk meter; phase meter; addition the TMIO features linear ranges from peak programme meter; true RMS voltmeter; ±30µV to ±300V and ±30pA to ±300mA; a wow and flutter meter; drift meter; rumble large meter with 120mm scale; and an output of meter; noise meter (with facilities for optional ± 1V at FSD is available to drive a pen recorder. plug -in CCIR, DIN, IEC or NAB standard A further new unit from the company is the filters); power meter; and a digital frequency TG301 function generator which provides sine, counter. The facilities of the unit are almost too square, triangle, pulse, sawtooth ramp and numerous to detail, but suffice to say that the asymmetrical sine waveforms over the wide unit is capable of meeting the needs of virtually chop frequency, auto level (lock) circuit, one frequency range of 0.02Hz to 2.IMHz. Features every test requirement likely to be met in normal touch triggered delay, variable hold off and one of this generator include the capability of sweep- recording or broadcast studio usage. The AMS1 touch XY operation. The 5650 incorporates an ing the frequency over three decades by an is available in two versions, one a standard rack - illuminated internal graticule, but the 5650E an external voltage; 20V peak to peak main output mount version and the other a free -standing economy version of the oscilloscope whilst from a 50 D source; a TTL output suitable for portable version.

Generate virtually any wave shape with Famous B&K- PRECISION cost - effectiveness!

You will learn more because .. . ¡+%(PRECISION DYNASCAN CORPORATION The new B. & K. Precision Model 3020 sweep/ function generator can actually replace function, sweep pulse and tone -burst generators. Frequency spans 0.02Hz to 2MHz in seven ranges

- each providing linear 1000 : 1 frequency control. A low distortion, high accuracy signal source; the 3020 will generate most types of wave -form, all of which can be inverted. Featured are internal and log sweeps with variable modulation and carrier levels to test double sideband suppressed carrier test signal. If you require a standard function generator only, try the 3010 which generates various wave -forms over six ranges with external VCo input for sweep frequency tests. The variable DC off-set on the 3010 will demonstrate a shifted operating point of a DC amplifier. Outstanding value - for more I. CANADIAN INSTRUMENTS information and local distributor - & ELECTRONICS LTD., address send your request to: Harris -Bass House, Station Road, Ilkeston, Derbyshire DE7 5TX. ill Tel: 0602 -302331. Telex: 377755.

40 STUDIO SOUND, FEBRUARY 1982

www.americanradiohistory.com MODULAR ELECTRONIC A U DIO INSTRUMENTS CABINETS NOW! you can design your own "custom" cabinet /enclosure from standard components...

Bang & Olufsen make Audio Measurements DIVISION Or WYCO MEIAI PROOYGIS simple and uncomplicated

WRITE OR CALL FOR FREE CATALOG #104

6914-6918 BECK AVE. NO. HOLLYWOOD, CA. 91605 U.S.A. Measurements of, (213) 875.0800 TWX 910 -499 -2177 * mV andVAC,mVandVDC * frequency response * signal- /noise ratio * output power up to 1000 Watts * wow and flutter, selectively * distortion and erasure

The Bang & Olufsen electronic instrument programme includes wow /flutter meters /distortionmeter /AC and DC voltmeters /audiomonitor /AC and DC power supplies /signal -/ noise meter /RC oscillator.

Write or phone for free catalogue.

UK: Danbridge (UK) Limited USA: Bang & Olufsen of America Inc. Sherwood House 515 Elk Grove Village, IL High Street Ph.: (312) 6400660 Not only do we manufacture Crowthorne, Berkshire and sell our own products... RG11 7AT but also we now stock the Ph.: (034 46) 2369 Tlx. 847782 best in audio equipment! Manufacturing: mixers by Revox, Teac, Tascam. The S19G and the unique S19GA H/H mos -fet range of power amps. /2 Doive graphic equaliser/analiser, for Beyer microphones, stands, ultimate control. headphones, accessories, XLRs, Jacks, The PM-80 compact modular production Gaffer tape, cable etc. mixing system, of studio quality. Complete high quality P.A. systems for Demonstration lounge. all applications. Custom built loudspeaker enclosures Service Dept. suitable for all types of JBL drivers, in a JBL recones. Most types of pro -audio variety of finishes. equipment serviced. Special projects - custom consoles, As a professional audio company with capacity for one -off or short many years of experience in systems production runs. design and manufacture we can offer you the best possible advice and Stockists: service there is. Large range of JBL loudspeakers, Bang &Olufsen studio monitors, pro- series components. Formula Sound Ltd. New E range of musical instrument 3 Waterloo Road. chassis. Stockport. Cheshire. SKI 3BD. Electronic instruments DK 7600 Struer Replacement diaphragms and cones. Telephone :061- 4803781 Tape recorders, cassette decks and Telex 669249

www.americanradiohistory.com F242A: distortion and noise meter; provides measurement of tape recorders, cartridges and automatic tuning on the fundamental rejection turntables, contains necessary amplifiers, filters, frequency; for distortion and level measurement. de- emphasis (RIAA) chopper for balance E247: Level meter psophometer; with true RMS or measurements. A and B rumble filters and synchro- quasi -peak reading meter. starter which operateswith 1kHzbands recorded on A248: wow and flutter meter; measures wow and B &K test discs, and provided by 1023 /27generators flutter plus drift to DIN, IEC, IEEE and ANSI for test tapes. standards, weighted or unweighted. 4712: audio frequency response tracer using 14in S1100: broadcast audio test transmission. display; provides frequency response curves on CRT when used with sweep generator. BACH- SIMPSON (Canada /UK) -Simpson PO Box 5484, 1255 Brydges (UK) Bach Ltd, ABACUS Street, London, Ontario. Phone: (519) 452-3200. CONSILIUM (SWEDEN) Abacus Electrics, 10 Barley Mow Passage, London Telex: 0645843. Consilium Industri AB, Birger Jarlsgatan 15, W4 4P H. Phone: 01 -994 6477. Telex: 8811418. UK: BachSimpson (UK) Ltd. Trenant Estate. S -11145 Stockholm. Phone: 08 32.21.33. Telex: UK: Kirkham Electronics, Mill Hall, Mill Lane, Wadebridge, Cornwall P127 6HD. Phone: 020 881 11083. Pulham Market, Norfolk IP21 4XL. Phone: 037976 2031/3. Telex: 45431. UK: Dawe Instruments Ltd, Concord Road, Western 594/639. Wide range of test equipment including digital and Avenue, London W3 OSD. Phone: 01.9926751. Telex: ARTA 8000: 27-band 1/3-octave realtime analyser analogue multimeters, function generators and 934848. with CRT display and built -in pink noise generator. frequency counters. RTA11: realtime 31 -band 1/3- octave analyser using external scope for display. Three integrating time ACOUSTILOG (USA) B & O (Denmark) constants. Acoustilog Inc, 19 Mercer Street, New York Bank & Olufsen, DK -7600 Struer. Phone: 0785.11.22 RTA12P: similar to RTAI1 but with 32nd wideband; NY10013. Phone: (212) 925.1365. UK: Bang & Olufsen (UK) Ltd, Eastbrook Road, three selectable memories. 232A: reverb timer providing digital LED display of Gloucester GL4 7DE. Phone: 0452 21591. Telex: CI111: realtime audio analyser with LED display. time; shows room decay time to be displayed for 43215. CI1812A: similar to RTA12P but with LED matrix each of 19 switchable frequency bands on'/3 -octave WM1: wow and flutter meter with drift and frequency display with 16 levels and 1, 2 or 3dB /octave intervals; provides 10ms resolution of reverb time analyser. selection. up to 9.99s with 20dB x 3 or 30dB x 2 to measure WM2: similar to above but without analyser. CI1818: sweep generator and curve tracer. RT60. Built -in pink noise generator. AM1: audio monitor with watt- and voltmeter. CI1820: psuedo noise generator; uses 39-bit long The Impulser available separately or as an option NM1: noise and voltmeter. shift register to generate pink or white noise. for 232A, permits polarity, phase alignment and RWM4: stereo wattmeter. CI1823: realtime audio analyser, phase monitor, impulse response to be checked. TF2: tunable filter with three measuring ranges. signal level and balance monitor, with CRT display. TG7: sine /square wave low distortion oscillator, CI1824: sweep generator /curve tracer with digital AEC (West Germany) 10Hz to 1 MHz. display memory. Audio Engineering Components GmbH, CI1825: X -Y -Z monitor scope. Obertshausen, D -8053 Geleitstrasse 11. Phone: 610 B & K (Denmark) 44.23.24. Bruel & Kjaer AIS, DK -2850 Naerum. Phone 02 CROWN /AMCRON (USA) Export: Audio International Vertriebs GmbH, Box 80.05.00. Telex: 37316. Crown international, 1718 West Mishawaka Road, 560229, Gonzenenheimstrasse 2B, D -6000 UK: B & K Laboratories Ltd, Cross Lances Road, Elkhart, Indiana 46514. Phone: (219) 294.5571. Telex: Frankfurt 58, West Germany. Phone: 611 50.47.33. Hounslow, Middx TW3 2AB. Phone: 01 -570 7774. 810.295 2160. Telex: 413039. Telex: 934150. UK: HHB Hire & Sales, Unit F, New Crescent Works, ARA414.27G: 27 -band 1- octave realtime analyser USA: Bruel & Kjaer Instruments Inc, 185 Forest Nicoll Road, London NW10. Phone: 01 -961 3295. with CRT display. Display range 27dB; three Street, Marlborough, Mass 01752. Phone: (617) Telex: 923393. selectable release times; built -in pink noise. 481 -7000. RTA-2: realtime 32-band 1/2- octave analyser using AFA415SG/B: dual channel frequency response Measuring microphones: wide range of capacitor 5in CRT display. measurement unit with CRT display. types with 1/2, 1 /e,'/2 and 1 in diameters. Free field or Badap 1: 'audio microcomputer', programmable audio measurement TV (USA) linear pressure responses. Numerous accessories. system; 9in colour displays ALTAIR 4220/4221/4230 mic calibrators: 4220 Pistonphone a wide number of audio parameters depending on Altair Electronics, 1694 Calle Zocalo, Thousand is battery driven with 124dB level and barometer for software. Provides line and mic inputs, displays Oaks, Cal 91360. Phone: (805) 529.2496. pressure corrections; 4221 is high pressure offer 1, 3, or 6dB /division, while the 6dB /division T'DS: tape /transport diagnostic system. Measures calibrator up to 164dB SPL; 4230 is pocket -sized shows +20 to - 60dB range, plus providing 0.25dB flutter over a frequency range 20 times wider than battery powered unit giving 94dB at 1kHz. resolution on 1dB /division. Five software packages the NAB /IEC standards; detects in -phase and 4204/4205 sound sources for room measurement: at present: realtime 1/3- octave analysis, 20Hz to quadrature sidebands. 4204 is a reference source of 70dB, range 100Hz to 20kHz, with rapid plot or memory analysis option; AMBER (Canada) 10kHz with less than 6dB directivity. 4205 can be RTeo, Acoustic Distance Measurement indicates used forA- weighted or octave band, etc, comprising distance between loudspeaker and mic for Amber Electro Design Ltd, 4810 Jean Talon West, generator and separate radiator. determination of critical distance and delay line Montreal, H4P Phone: Quebec 2NS. (514) 735-4105. 7507 power processor digital display of level and setting; chromatic spectral decay shows rever- UK: Scenic Sounds Equipment Ltd, 97 -99 Dean frequency in octave or 1/3- octave bands. berant decay in 31 bands optional 32-channel Street, London W 1 V 5RA. Phone: 01-7342812. Telex: 1023/1027 sine and sine /noise generators: 1023 hardware input multiplexer level display peak or 27939. covers 10Hz to 20kHz in one range, linear or log, average, and two simultaneous 1/3- octave analysis 4400A: multipurpose audio test set; digital meter variable FM, external sweep control. 1027 displays. Future software will include 64 channel section reads narrow band level or wide band and generates sinewaves, narrow bands of random multiplexer, disc tracker, á-octave analyser, frequencies from 10Hz to 100kHz; receiver section noise, white noise and pink noise; range 2Hz to harmonic distortion, intermodulation distortion, provides differential or dual channel input and 200kHz in three lin /log bands, external sweep. weighting curves, digital filtering wow and flutter enables four digital plots (256 x 256) to be stored 2610/2607: measuring amplifiers with meter. spectral analysis. loudspeaker phase alignment. and displayed on a normal scope or a plotter. for noise measurement. versus 2429: psophometer Provides plots of amplitude or phase time or 2971/6202: phase meter and phase delay unit. frequency. DALELCO (DENMARK) 6203: wow and flutter meter. Hammer 4400AXY: similar to 4400A but with X and Y DC Export: Trading Co ApS, Dalen DK-3060, 1617/8: bandpass filters. Espergaerde. signals and pen drop contact closure for plotters. 2010: heterodyne analyser. 4405: accessory for 4400A which allows distortion UK: Telonic /Berkeley UK, 2 Castle Hill Terrace, 2020: heterodyne slave filter. Maidenhead, Berks SL6 4JR. Phone: 0628 28057. to be measured and plotted. 2120: frequency analyser. Model 444: weighting network kit, five dedicated Telex: 849131. 1902/1901: distortion measurement control unit and SAW 3150: wow and flutter meter. 3,150Hz weighting filters, 400Hz highpass, 10kHz lowpass, tracking frequency multiplier. ANSI A, B and C, and five blanks for custom oscillator, four ranges for flutter from 0.1 to3 %;four networks. 2031: narrow band spectrum analyser using 11in ranges for drift from *0.1 to 3 %. Measures to DIN display screen, generates and displays 400 and CCIR, optional JIS /NAB. 3500: portable distortion measuring set includes an channels (bands) with different frequency ranges. ultra low distortion sinewave oscillator; total SPM100: 2- channel LF wattmeter; provides frequency using 11 in display noise 2131: digital analyser indication for two channels. 10 ranges from 10µW to harmonic distortion analyser and meter; true screen. Uses digital filtering detection and RMS meter; low or fast, linear dBscale; narrow band 100W, true RMS; A- weighting, response 20Hz to averaging, displays 421/3 -bands from 1.6Hz to 20Hz 20kHz, load resistance 4, 8 or 160. internally 1 filter adjustable to k- octave tunable or 14 octave bands from 2Hz to 16kHz. over full range; for null and set automatic operation 2306: portable, battery powered chart recorder, log DOLBY (UK) levels; option for IM distortion measurement. recording in range 1.6Hz to 20kHz, linear and log Dolby Laboratories Inc, 346 Clapham Road, London ANNIS (USA) recording of DC signals, RMS detector; eight paper SW9. Phone: 01-720 1111. Telex: 919109. R B Annie Co, 1101 N Delaware Street, Indianapolis, speeds, four writing speeds, chart width 2in. USA: Dolby Laboratories Inc, 731 Sansome Street, Indiana 46202. Phone: (317) 637.9282. 2307: versatile chart recorder for range 2Hz to San Francisco, Cal 94111. Phone: (415) 392 -0300. UK: Leevers Rich Ltd, 319 Trinity Road, London 200Hz, recording as a function of time or frequency, Telex: 34409. SW 18 3SL. Phone: 01-874 9054. Telex: 923455. chart widths 2in or 4in, 15 writing speeds. 12 chart CAT98A: noise weighting filter, designed to apply Pocket Magnetometers: range of magnetometers. speeds, polar plotter. CCIR noise weighting to circuits under test. 2308: X-Y chart recorder; plots chart for fast linear AWA (Australia) DC signals, fast slewing speed of 1,000mm/s -' and EMT (West Germany) Amalgamated Wireless (Australasia) Ltd, PO Box max accleration of 100mmIs-'; takes A4 sized paper, EMT-Franz GmbH, Postfach 1520, D -7630 Lahr. 2516, Sydney 2000. Phone: 20233. Telex: 21515. built -in sweep generator, remote control. Phone: 07825 512. Telex: 754319. UK: Marconi Instruments Ltd, Longacres, St Albans 2309: 2- channel portable, chart recorder similar to UK: FWO Bauch Ltd, 49 Theobald Street, Boreham AL4 OJN. Phone: 0727 59292. Telex: 23350. 2306 but two separate writing systems, pen lift. Wood, Herts WD6 4RZ. Phone: 01-953 0091. Telex: G232: low distortion oscillator with four ranges 3922: motorised turntable designed to rotate test 27502. covering 10Hz to 110kHz. objects for polar diagram responses in USA: Gotham Audio Corp, 741 Washington Street, G233: ultra low distortion oscillator with four ranges synchronism with 2307 level recorder. New York, NY 10014. Phone: (212) 741-7411. Telex: covering 10Hz to 110kHz. 4416: response test unit. Designed for 129269. 44 0. 42 STUDIO SOUND, FEBRUARY 1982

www.americanradiohistory.com The Synergy. At £2975 it makes other synths sound like a waste of money.

Let's face it, a 48 -voice digital synthesiser at sensitivity with respect to volume, timbre and A four function joystick offers further £2,975 is good value for money. Especially as the modulation; vibrato rate, depth and delay; speed performance control: pitchbend up and down, and Synergy is a totally digital polyphonic perormance of portamento (three modes - smooth with leadline or global vibrato. A four channel sequencer synthesiser. Its six octave dynamic keyboard retrigger, smooth with no retrigger of envelopes and may be used monophonically or polyphonically controls 48 voices -24 preset and 24 on semi -tone quantization). and recalls all phrasings, pitchbends, nuances and interchangeable cartridge. In total over 1000 Each voice may be panned to left or right key velocity; tracks may be repeated and transposed sounds are available. outputs, both outputs, or alternating left and right. independently. That's comparable to machines over bur times Each voice may be assigned to the keyboard If you think all this sounds good, send for a its price! And if that sounds good, listen to some of in one of four modes, polyphonic, monophonic, free demo tape. its other features - different performance keysplit or rolling mode and the keyboard can Syco Systems Ltd 20 Conduit Place London characteristics may be assigned for each voice; key accommodate up to four sounds simultaneously. W2.Telephone 01 -723 3844 for an appointment.

www.americanradiohistory.com 10Hz to FORMULA SOUND (UK) 239A: low distortion oscillator; generates 110kHz in four ranges. 3 Waterloo Road, Stockport Formula Sound Ltd, 339A: distortion measurement set; true RMS SK1 3DB. Phone: 061.480 3781. distortion analyser, ultra low distortion and AC 1/2- octave graphic SG19GA: 2-channel, 20 -band millivoltmeter in one package, auto frequency 2 LEDs per band. equaliser and analyser using tuning and set level, tracking oscillator, directional range and frequency Indicators, highpass and two GENRAD (USA) lowpass filters, normal or VU meter characteristic. GenRad Inc, 300 Baker Avenue, Concord, Mass 7563A/7562A: log voltmeter /amplifier and 01742. Phone: (617) 369-8770. Telex: 923354. voltmeter/converter; provides 110dB dynamic UK: GenRad Ltd, Norreys Drive, Maidenhead, Berks range, positive or negative DC inputs, output SL6 4BP. Phone: 0628 39181. Telex: 848321. scaling, allows inputs from 0.3mV to 100V ( -100 to EMT424: wow and flutter analyser; equipped with Measuring microphones: range of microphones, OdB) to be displayed logarithmically on a single manual or automatic tunable bandpass filter. preamplifiers and accessories. range meter, or fed to a chart recorder. The 7562A above, but uses25.2kHz,50.4kHz EMT425: sim ilar to 1987: minical sound level calibrator; produces 1 kH: has 80dB dynamic range (1mV to 10V) but also and 100.8kHz for high speed duplicator at 94 or 114dB, adaptors for various mics. accepts AC signals over the range 0.5Hz to 100kHz, measurement. 1562 -A: sound level calibrator; produces five fre- provides 0.25dB accuracy, switchable to cover EMT422: wow and flutter meter; two presettable quencies between 125Hz and 2kHz with ±0.3dB 10MV to 100V, switchable lower frequency limit. threshold limits, various weighting functions, accuracy at 500Hz, at 114dB, fits various mics. 3581A: wave analyser; separates and measures the shows flutter and drift on separate meter, built -in 1995: integrating realtime'/3- octave analyser using amplitude and frequency of spectral components 3, 115kHz generator. 5in display screen; 25Hz (or 2.5Hz) to 20kHz with over range 15Hz to 50kHz. EMT423: wow and flutter chaRtecorder, six speeds. 50dB display range on aCRTwhich shows bargraph 3585A: spectrum analyser using CRT display; Includes an audio monitor function. or numerical values; A-weighting or flat, sound covers 20Hz to 40MHz with 3Hz minimum resolu- EMT1601161: acoustic polarity tester; 161 is mic exposure level integration times. tion bandwidth. preamp. 1985: chart recorder accepting DC inputs and Strip chart recorders: four strip chart recorders versatile with EVENTIDE (USA) designed for use with GenRad sound level meters or using paper roll; 680 is compact and Inc, 265 W 54th Street, New noise analysers, but may also be used with many 5in wide charts, 10 ranges from 6mV and 8 speeds Eventide Clockworks 2.5cm /hour, stainless steel or York, NY 10019. Phone: (212) 581.9290. other devices; provides 50dB dynamic range, chart from 20cm /min to /min, 7155B is similar but portable, 16 UK: Feldon Audio Ltd, 126 Great Portland Street, speeds from 2cm /hr to 60cm battery operated. disposable pens, 2512: narrow band spectrum analyser using 5in ranges from 0.1 mV to 10V /cm, 7 speeds, disposable London W 1 N 5PH. Phone: 01.580 4314. Telex: 28668. 100kHz with 400 lines of frequency on paper. 7132A has two pens (option Realtime Spectrum Analyser. realtime 31 -band display; DC to pens coated real time analysis up to 20kHz, optional one) writing on 10in wide paper, 8 chart speeds, 1/3- octave analysers for PET, Apple and TRS80 resolution 7100B series is a board of full and 1/3- octave filters. thermal or ink pens, various inputs. home computers; the analysers comprise and many electronics with filters, detectors. A/D and ROM, all 1840 -A: output power meter. plug -in adaptable, 10in wide paper control through the computer's keyboard. Display is 138111382: random noise generators. 1381 options. flat from 2Hz to 2.5 or 50kHz with X -Y recorder plotter; with A4 or 81/2 x 11in via the computer CRT, displays 31 1/3- octave filters generates noise 71018: 1382 white, range 0.1V /in, slewing speed from 20Hz to 20kHz on ISO centres (but not to ISO adjustable clipping, while the provides charts, single input standards), with extra wide band level channel. pink or ANSI spectras. 50cm /s. INOVONICS (USA) FARNELL (UK) GOLD LINE (USA) Inovonics Inc, 530B Vandell Way, Campbell, Cal Famell Instruments Ltd, Sandbeck Way, Wetherby, Gold Line, PO Box 115, West Redding, Connecticut 95008. Phone: (408) 374-8300. Yorkshire LS22 4DH. Phone: 0937 63541. 06896. Phone: (203) 938-2588. UK: Feldon Audio Ltd, 126 Great Portland Street, in LFM3: sine /square oscillator; covers 10Hz six UK: Anglia CB Ltd, Yew Tree Farm, Brockford, London W1 N 5PH. Phone: 01-580 4314. Telex: 28668. 1 MHz for square. ranges for sinewaves, and to Stowmarket, Suffolk P14 SPE. Phone: 04494 345. Model 500: realtime 1/3- octave analyser and reverb with one or two pens; PR1AIPR2A: chart recorder Range of audio spectrum analysis systems. ASA-10 analysis; uses 301 /3- octave filters from 25Hz to 10in wide paper, 21 chart various input modules; and ASA-10B battery powered, handheld units with 20kHz and one wideband channel, 13 -step LED speeds, pen response 800mm/s. various weightings; ASA -10C rackmount realtime matrix switchable for 0.5, 1, 2 or 3dB per step, X -Y recorders with single pen; X -Y recorders: chart analyser with LED display. various decays, dBA -spl, dBm and RT,6o available in A3orA4 paper size having optional time - measurement. Two separate memories, auto level base module, electrostatic paper hold, pen lift. GOULD ADVANCE (UK) pink noise generator, digital readout. Decay plot for dual trace 12MHz oscilloscope with 5in DTV12.14: Ltd, Roebuck Road, Hainault, reverb. screen. Gould Advance Essex. Phone: 01-500 1000. Telex: 263785. DSG2: digitally synthesised signal generator, range !VI E (USA) 1x10-'to11x109Hz. J3B: test oscillator 10Hz - 100kHz in four ranges. !vie Electronics Inc, 500 West 1200 South, Orem, TM10: power meter, frequency response 25MHz to Utah 84057. Phone: (801) 224-1800. Telex: 910.971 1GHz, power levels 20mW to 100W. HEATH (USA) 5884. Heath Co, Hilltop Road, Benton Harbour, Missouri UK: FWO Bauch Ltd, 49 Theobald Street, Boreham FEEDBACK (UK) 49022. Phone: (616) 982.3411. Wood, Herts WD6 4RZ. Phone: 01-953 0091. Telex: Feedback Instruments Ltd, Park Road, Crow- UK: Heath Electronics (UK), Bristol Road, Glous GL2 27502. borough, Sussex TN6 2OR. Phone: 08926 3322. 6EE. Phone: 0452 29451. Telex: 42179. IE -10A: handheld full octave real time analyser Telex: 95255. SG -5218: generates sine and square waves from 1 Hz using LED matrix display; battery powered, 10 band USA: Feedback Inc, 438 Springfield Avenue, to 100kHz (square only down to 5Hz) in four ranges from 32Hz to 16kHz real time analyser with 16 step Berkeley Heights, New Jersey 07922. Phone: (210) with linear frequency selection. switched display, switchable 45, 30 or 15dB dynamic range, 464 -5181. attenuator, - 62dB to + 22dB. built -in capacitor measurement mic, 80dB preamp, FG6001601: function generators; generate sine, SG -1272: low distortion audio frequency oscillator; switchable to operate as sound level meter with A or square and triangle waveforms, FG600 0.01 Hz to generates sinewaves from 5Hz to 100kHz with push C weighting. 100kHz in seven ranges, FG601 0.001 Hz to 1MHz in button frequency selection, 10 to 70dB attenuator. IE -20B: battery powered, handheld pink and white nine ranges. SM -5258: harmonic distortion analyser with auto noise generator, covers 20Hz to 20kHz ±0.5dB, VP0602: variable phase oscillator; covers range nulling, range 5Hz to 100kHz, also AC digitally generated. Attenuation to - 58dBm. 10Hzto 100kHzwith phase adjustable overfull360° millivoltmeter. IE -30A: battery powered, handheld 30 -band SS0603: sine /square oscillator; generates sine and SM -5248: intermodulation distortion analyser, 1/3- octave 25Hz to 20kHz analyser using LED matrix squarewaves from 10Hz to 1MHz in five ranges. using 60Hz and 7kHz frequencies, external with 16 steps, and switchable 15, 30 or 45dB EW604: electronic wattmeter covers power range oscillator input for different frequencies, distortion dynamic range, also displays octaves, or weighted can be 250mW to 10kW, voltage 5V to 1 kV, current 50mA to ranges from 0.1 to 100 %, AC millivoltmeter 1/3- octaves. Reference level selectable and dis- 10A, frequency range DC to 20kHz. used separately with 12 ranges from 10mV to 300V. played switchable decay including peak holding, ID -5252: audio load 2, 4, 8, 16 and 32G. two -non- volatile memories, precision sound level FERROGRAPH (UK) IR -18M: strip chart recorder; allows plotting on 10in meter operates simultaneously with direct readout Ferrograph Instrumentation, Unit 21, Royal Indus- wide paper linearly scaled, 1 mV or10mV sensitivity, in 0.1dB resolution ofdBSPLand dBµV,digital hold, trial Estate, Jarrow, Tyne & Wear NE32 9XX. Phone: 12 chart speeds from 5s /in to 200min /in. fast slow, inpulse and peak readings, A, C, or flat 0632 893092. Telex: 537227. SR -207: X -Y chart plotter; uses standard 81/2 x 11 in weightings. Electret measuring microphone. USA: NEAL-Ferrograph (USA) Inc, 652 Glenbrook graph paper, calibrated rangesof 1 mV per inch, orto IE -17A: microprocessor audio analyser; accessory Road, Stamford, Connecticut 06906. Phone: (203) 10V in variable mode, electric pen lift, balancing which clips onto IE -30A; allows reverberation time TTL 348 -1045. Telex: 643678. time less than 1s, remote control. to be measured for full and 1/3 -octaves, also displays RTS2: tape recorder test set; includes 4 -range oscil- reverb plots (on the IE -30A), and provides tracking lator covering 15Hz to 15kHz with variable output, HEWLETT-PACKARD (USA) filters; measures room delays, frequency marker to millivoltmeter covering - 60dBm to + 40dBm fsd, Hewlett- Packard Corp, 1501 Page Mill Road, Palo provide 0.1dB measurements from any band on the LF cut filter, distortion meter reading down to0.1 °/u Alto, Cal 94304. Phone: (415) 493-1501. Telex: IE -30A tone burst and auto gating, automatic FSD with manual tuning, wow and flutter 348461. plotting on chart or X -Y recorders; takes power from measurement down to 0.1 % and drift. UK: Hewlett- Packard Ltd, Kings Street Lane, IE -30A. ATU1: accessory for use with RTS2 which provides Winnersh, Nr Wokingham RG11 5AR. Phone: 0734 Gold Standard range: range of calibration balanced inputs and outputs, monitor loudspeaker, 784774. Telex: 847178. microphone capsules, preamps and power meter loading, weighting network, oscillator 3311A: function generator; sine, square, triangle supplies. amplifier and attenuator. and pulse functions from 0.1Hz to 1MHz in 10 ranges, 3% distortion, DC offset pulse output. KENWOOD (Japan) FIDELIPAC (USA) 3312A: function generator; provides sine, square USA: Kenwood Electronics Inc, 1315 E Fidelipac Corp, 109 Gaither Drive, Mt Laurel, New and triangle waveforms from 0.1Hz to 13MHz, the Watsonceiter Road, Carson, Cal 90745. Phone: Jersey 08057. Phone: (609) 235 -3511. Telex: 710 -897 output of which may be modulated by a second (213) 518.1700. Kenwood Electronics Inc, 75 0254. function generator covering 0.01Hz to 10kHz AM, Seaview Drive, Secaucus, New Jersey 07094. 65-390: portable wow and flutter meter, internal FM, swept, triggered or gated. Internal sweep for UK: Harman (Audio) UK Ltd, Mill Street, Slough SL2 3.15kHz oscillator, range 0.1% and 0.5% fsd, drift main generator over two decades, DC offset, 5DD. Phone: 0753 76911. Telex: 849069. t5 %. external frequency control. 46 44 STUDIO SOUND, FEBRUARY 1982

www.americanradiohistory.com 1 ellwn o ., j) . - .,1,1 1.111,\,VALlitt, I. 660titAti1ir.

And Now The Proline Professional Package For ALLYour Recording Needs. Proline1000 and 2000Tape Recorders Tomcat Cartridge Recorders BMX Mixing Consoles Slow Speed Logging Recorders Garner and Leevers Erasers vaitii4-44

am,

FESSI AL Leevers-Rich Equipment Limi 319 Trinity Road Wandsworth Ion .. W18 3SL Telephone 01 874 9054 Cables Leemag London SW18 Telex 923455

www.americanradiohistory.com TG152: RC oscillator. Generates sine and square MJS ELECTRONICS (UK) waves from 3Hz to 300kHz in five ranges. MJS Electronics, Kenward House, Hartley Wintney, TM3AIB:AC microvoltmeters. Cover bandwidth 1Hz Hants. Phone: 025126 3535. Telex: 858733. to 3MHz and measure - 100 to + 50dB or 15µV to Model 401: noise and level test set. Measures noise 100V in 16 ranges. TM3A 83mm scale TM3B 127mm to the IBA 'code of practice' using standard PPM scale. 1 -7 scale, or special dBm and V calibrated scale, TM10: electronic null detector. measures audio level from - 90 to + 30dBm, or TM14: battery powered insulation tester. 3011V to 30V, switchable in 10 and 1dB steps, input level accuracy *0.02dB in 1dB steps, equivalent rms, LINDSAY (UK) input noise 30kHz bandwidth - 115dB filter, hi and lo pass filters,CCIR Ifton Hill House, - 112dB peak input Lindsay Electronics Ltd, filter, external filter sockets, phones output, normal SE9000: suitcase -mounted acoustic measuring Portskewett, Newport, Gwent NP6 4TT. Phone: 0291 system includes chart recorder, level meter; PPM scale (with 4dB between divisions) or 420517. 0.5dB between divisions). electret mic; mains powered. 97-99 Dean expanded scale (with UK: Scenic Sounds Equipment Ltd, providing 12 spot 011734 2812. Model 402: precision oscillator Street, London W1V 5RA. Phone: frequencies with variable tuning facilities. KIKUSUI (Japan) Telex: 27939. UK: Telonic /Berkeley UK, 2 Castle Hill Terrace, Model 7634: realtime 1/2- octave spectrum analyser. Maidenhead, Berks SL6 4JR. Phone: 0628 28057. 271/3- octave bands from 40Hz to 16kHz, 10 step LED 3MIMINCOM (USA) Telex: 849131. matrix with 10 or 20dB display ranges, flat or A 3M1Mincom Division, 3M Centre, St Paul, Minne- 4045: low distortion oscillator; covers 5Hz to500kHz weighted, over range indication on each band, fast sota 55101. Phone: (612) 733.1110. mic input in five ranges, with sine or square wave outputs. or slow decay, mic and line inputs, UK: 3M UK Ltd, PO Box 1, Bracknell, Berks RG12 458A: function generator; generates sine, square directly in dB SPL for level measurement, displayed 1 J U. Phone: 0344 26726. Telex: 849371. and triangle waveforms. Covering 0.01 Hzto 100kHz two memories, internal noise generator. Model 8155A: wow and flutter meter. Measures with in seven ranges. 3,000, 3,150 and 1,000Hz tones, input level 100mV 462: sweep generator; covers 2Hz to 200kHz in a min, six ranges from 0.03% to 10% rms (NAB) or single sweepable range, sinewave output. LINDOS (UK) peak (IEEE /DIN). 1631A:AC millivoltmeter; covers0.1 mVto300V in 14 Lindos Electronics, Sandy Lane, Bromeswell, Model 8100AW: wow and flutter meter which ranges, -80dß to +50dB with a response from Woodbridge, Suffolk IP12 2PR. Phone: (Eyke) 03847 measures with 3kHz tone; input level 5mV min; six 20Hz to 200kHz. 432. ranges from 0.03 to 10% flutter; drift measurement 6702: wow and flutter meter; measures with either LA1: portable audio analyser. Includes signal and wave analyser from 0.5 to600Hz tunable inthree 3k or 3.15kHz, input level 0.1mV to 10V, digital generator covering 15Hz to 100kHz in four ranges decade bands. indication of wow and flutter, tape speed, frequency (includes RIAA equalised output), frequency meter Model 610A: wideband sweep generator providing counter and frequency ratio, memory function built - covering 10Hz to 200kHz, wow and flutter meter to single continuous frequency sweep from 400Hz to in, selection of integration time. Measuring range DIN/IEC/NAB, residual reading 0.006 %, millivolt- 2.2MHz and is ideal for alignment of high speed 0.002% to 3% in six ranges. meter covering 10011V to 100V, intrinsic noise 41.LV, duplication equipment. Various options. 677C: wow and flutter meter; 3k or 3.15kHz, input weighting filters for CCIR /ARM, DIN audio band Model 6100: audio test set including sinewave level 5mV to 10V, digital tape speed indication, DIN A rumble, DIN B rumble, option for IEC A and C, generator; AC millivoltmeter and wave analyser. measures 0.005% to 3% in four ranges. distortion meter and spot frequencies of45Hz,1 KHz 630: automatic distortion meter; measures dis- and 10kHz, min resolvable reading 0.005 %. tortion at 400Hz and 1kHz (or with external filter), Additional facilities oscilloscope output, external NAKAMICHI (Japan) measures 0.1% to 30% in six ranges, auto level weighting, battery check, power outputs, high -pass Nakamichi Research Inc, 1.153 Suzukicho, setting, level meter 10mV to 100V with response filter. Versions with BNC or DIN connectors. Kodaira, Tokyo. Phone 042342.1 111. Telex:2832610. from 20Hz to 100kHz, separate meters for level and STI: studio interface extending the capabilities of UK: Natural Sound Systems, 10 Byron Road, distortion. the LA1 analyser, with balanced line interfaces Wealdstone, Harrow, Middx HA37TL. Phone: 01.863 860: voltage and insulation resistance tester. using differential amps, output amp provides 8622. Telex: 922573. Oscilloscopes: a wide range. + 26dBm output into 60052, input 'IMO impedance. USA: Nakamichi USA Corp, 220 Westbury Avenue, Carle Place, NY 11514. Phone: (516)333 -5440. Telex: KLARK -TEKNIK (UK) LYONS (UK) 144513. Klark- Teknik Research Ltd, Walter Nash Road West, Lyons Instruments Ltd, Ware Road, Hoddesdon, T -100: audio analyser providing voltage Coppice Trading Estate, Kidderminster, Worcs Herts EN11 9DX. Phone: 09924 67161. Telex: 22724. measurement, weighted noise measurement, DY11 7HS. Phone: 0562 741515. Telex: 339821. SQ10: sine/square oscillator: waveforms from 10Hz distortion measurement at 400Hz, speed USA: Klark -Teknik Electronics Inc, 262A Eastern to 1MHz in five decade ranges. measurement and weighted /unweighted wow and Parkway, Farmingdale, NY11735. Phone: (516) D10: distortion meter; 0.3% to 10% in four ranges, flutter measurements. 249-3600. tunable over 10Hz to 100kHz in four ranges, manual DN60: realtime 1/3- octave spectrum analyser LED nulling. matrix display; uses bands from 25Hz to 20kHz on NEPTUNE (USA) 1/3- octave intervals, 16 -steps providing 15dBor31 dB MARCONI (UK) Neptune Electronics Inc, 934 NE 25th Avenue, steps, internal pink noise generator, three Marconi Instruments Ltd, Longacres, St. Albans Portland, Oregon 97232. Phone: (503) 232.4445. memories, peak and average reading, three time Ltd, 35/39 Britannia Row, AL4 OJN. Phone: 0272 59292. UK: Court Acoustics constants, sound pressure level readout on 31st London N1 8QH. Phone: 01-359 0956/5275. Telex: band, peak hold, mic or line inputs with phantom USA: Marconi Electronics Inc, 100 Stonehurst Northvale, New Jersey 07647. Phone: (201) 268279. powering, variable intensity display. Optional RTso Court, 767 -7250. Telex: 710-991 9752. Model 2709: realtime 1/2- octave spectrum analyser facility and outputs for plotter and scope. 1/2- bands TF2000: AF signal source. 20Hz to 20kHz in six with LED matrix display; uses 27 octave from 40Hzto 16kHz; nine steps per band switchable (Japan) bands with 0.1 % distortion; three decade,111dB in LEADER 0.1dB steps, monitored attenuator. 1 or 3dB per step; internal pink noise generator. Leader Electronic Corp, 2.6.33 Tsunashima TF2005R: two tone signal source. Similar to TF2000. Higashi, Kohoku -Ku, Yokohama 223. but two oscillators for IM measurements. NEUTRIK (Liechtenstein) UK: Cybervox Ltd, 105/107 Oyster Lane, Byfleet, AF oscillator. Similar to TF2000, but no Telex: TF2102M: AG, FL -9494 Schaan. Phone: 075 263.83. Surrey KT14 7JH. Phone: 09323 51051. attenuator, and range from 3Hz to 30Hz in Neutrik Princes stepped Telex: 77771. 262525. Martron Ltd, 20 Park Street, four bands. Risborough, Bucks. Phone: 08444 4414. range 20Hz to UK: Eardley Electronics Ltd, Eardley House, TF2330A: wave. analyser; covers W8 7AS. LSA5500: audio system analyser containing signal of individual frequency 182 -184 Campden Hill Road, London 76kHz, measures amplitude Telex: 299574. generator, attenuator, AC millivoltmeter, dummy suitable for FM stereo encoded Phone: 01 -221 0606. components, Philips Audio Video Systems Corp, 91 McKee load, wow and flutter meter and oscilloscope. and also harmonics, 7Hz bandwidth for USA: AC signals, Drive, Mahwah, New Jersey 07430. Phone: (201) LAV191: audio tester with signal generator and closely spaced components, 15 ranges of millivoltmeter. from 304V to 300V, auto frequency. 529-3800. sensitivity 3201 automatic level recorder LFR5600: frequency response chart recorder with TF2331A: distortion factor meter. Range 20Hz to Audiotracer: portable comprises a voltage controlled oscillator covering sweep oscillator. 20kHz, input frequencies to 100kHz, measures dis- LEA5610: equalising amplifier for LFR-5600; weighting either 20Hz to 20kHz, or 200Hz to 200kHz; 0.5% tortion and noise from less than 0.05 %, warble tone provides 40dB amp, and either linear or B &K EQ for to 72dBm. distortion from 200Hz to 5kHz; filter, noise measurements - 5Hz swing. Input amplifier has 5mV cartridges. TF2337A: distortion meter. Separate modulator with automatic switchable ranges for linear, 25 or 50dB, LDM170: distortion meter. meters for level and distortion, fixed fundamental sensitivity, LFM -39A: wow and flutter meter; two versions for three writing speeds, varible paper speed, thermo- frequencies of 400Hz and 1 kHz, distortion measure- (DIN). sensitive recording paper, pen lift, mains powered. either 3,000Hz (JIS, CCIR) or 3,150Hz ment from 0.01 % to 30% in six ranges. LFM30: tape speed checker. Uses operating TF893A: AF power meter. Measures 1 mW to 10W in frequencies from 1 to 9kHzto measure speed or drift five ranges over frequency range 20Hz to 20kHz, NTP (Denmark) with t3 %. indication. to 20kO in 48 steps, bal or unbal, impedance 2.50 NTP Elektronik AIS, 44 Theklavej, DK2400 LAG -26: audio generator, sine and square waves. direct calibration in watts and dBm. LAG-125: low distortion audio generator, sine and Copenhagen NV. Phone: 01 10.12.22. Telex: 16378. square wave outputs. 177-520: stereo monitor oscilloscope showing LMV182A: AC millivoltmeter. Covers frequency McCURDY (Canada) phase and amplitude between two stereo channels. range 5Hz to 1MHz, measures -90 to +42dB, or McCurdy Radio Industries Ltd, 108 Carnforth Road, 507.100: gate /burst generator allowing dynamic 3013V in 12 ranges. Toronto, Ontario M4A 2L4. Phone: (416) 751-6262. characteristics of PPMs to be checked. Telex: 06963533. LEVELL (UK) USA: McCurdy Radio Industries Inc, 1711 Carmen Level) Electronics Ltd, Moxon Street, Barnet, Herts Drive, Elk Grove Village, Illinois 60007. Phone: (312) PHILIPS (Netherlands) Phone: 040 EN5 5SQ. Phone: 01-440 8686/449 5028. 640-7077. Telex: 910-222 0436. Philips, Eindhoven, Netherlands. TG301: function generator providing sine, square, SA14023: audio level meter, two ranges from - 50 to 79.11.11. Telex: 511121. triangle, pulse, sawtooth ramp and asymmetrical + 10dBm in 2dBm steps, or -30 to + 30dB, VU UK: Pye Unicam Ltd, York Street, Cambridge CB1 sine waves. meter standard, optional PPM. 2PX. Phone: 0223 358866. Telex: 81215. 48 46 STUDIO SOUND, FEBRUARY 1982

www.americanradiohistory.com Better than all measurers of delightful

n r Ö! 111 IWO" EN -ri rie .i . i an - _ sound. DN60 REAL TIME RT6O REVERBERATION SPECTRUM ANALYSER ANALYSER (Shelley 1792 -1822) The DN60 Real Time The optional 11T60 unit Spectrum Analyser is a new further extends the audio measurement system. It capabilities of the DN60, is capable of performance facilitating accurate and checks on virtually any audio comprehensive reverberation For further information on our complete range equipment, and is especially time analysis. RT60 figure is of professional audio equipment and application well suited for aligning audio displayed for any one of 30 details telephone (0562) 741515 tape recorders. On site Ard octave frequencies or performance verification, 'wide band' and the whether of a 10,000 seat reverberation decay curve is arena, or a studio control automatically plotted on the room, is easily effected with DN60 L.E.D. matrix display. the DN60. The RT60 features a The microprocessor variable decay window, three based circuitry makes the memories, selectable display 410 DN60 very cost effective and times and curve accumulate with the inclusion of Three function. Both impulse and Memories, and a Peak -Hold gated noise methods are function, you can expand the automatically recognised. 4110 410 scope of your sound check and provide that extra edge of An XV plotter and hard excellence. copy printer is available for t . the DN60 and RT60. 41110 4111 41 411

411) 01) 1 HUM 1EHniii I al sound science 41111

41111

U.K. and worldwide Klark- lbknik Research Limited, U.S.A. Klark- 7èknik Electronics Inc. Coppice Trading Estate, Kidderminster, 262a Eastern Parkway, Farmingdale, N.Y. 11735 Worcestershire DY 11 7HJ, England. Telephone: (516) 249 -3660 Telephone: (0562) 741515 Telex: 339821 www.americanradiohistory.com AFSA1: realtime' /3- octave spectrum analyser using UREI (USA) LED matrix display; 27 bands from 40Hz to 16kHz United Recording Electronics Industries, 8460 San providing 12 steps (3- colour to provide level indi- Femando Road, Sun Valley, Cal 91352. Phone: (213) cation) with total 24dB dynamic range; + 3 t - 4dB 767-1000. Telex: 651389. in 1dB steps then four steps to - 20dB; internal pink UK: FWO Bauch Ltd, 49 Theobald Street, Boreham noise generator; stereo line inputs. Wood, Herts WD6 4RZ. Phone: 01-953 0091. Telex: 27502. SENNHEISER (West Germany) Model 200: mainframe X -Y plotter designed by UREI Sennheiser Electronic, D -3002 Wedemark 2, and Hewlett- Packard; accepts 200 series modules Hanover. Phone: 05130 8011. Telex: 0924623. for various applications; uses electrostatic paper UK: Hayden Laboratories Ltd, Hayden House, holddown; disposableorfelt tip pens; vertical range Chiltern Hill, Chalfont St Peter, Gerrards Cross, 1V /in; horizontal 0.1V /in; 20in /s slewing speed. USA: Philips Test and Measuring Instruments Inc, Bucks SL9 9UG. Phone: 02813 88447/89221. Telex: Modules include the Model 2000 frequency 85 McKee Drive, Mahwah, New Jersey07430. Phone: 84969. response module; Model 2010 level and frequency (201) 529 -3800. USA: Sennheiser Electric Corp, 10W 37th Street, detector module; Model 2020 DC input module; and PM802/22: Stepper -motor driven single and 2 -pen New York, NY 10018. Phone: (212) 239 -0190. Model 20 warble generator module. chart recorders, input sensitivity 1mV to 50V, 11 UPM550: universal level meter covering bandwidth with 15 ranges to measure -98 to chart speeds, 0.25s response. 10Hz to 1MHz WAYNE KERR RADFORD single -line chart recorder, + 52.5dBm. Includes peak or RMS rectification and PM8110: portable, Wayne Kerr Radford Ltd, Durban Road, Bognor 120mm width, 2- speed, operated. a variety of weighting filters. chart battery Regis, West Sussex PO229RL. Phone: 0243 825811. PM8131132: single and dual pen X -Y chart recorders. ZP -2: portable, battery operated impedance tester. Telex: 86120. 0.25% accuracy, vector speed 1 m /s, 5011V sensi- AMS1: audio measuring test set with comprehen- tivity. oscillator; PM5107: LF generator, and square waves, SOLI DYNE (Argentina) sive facilities including low distortion sine multi- frequency distortion meter; multi- frequency 100kHz in four ranges, 20dß attenuator. Solidyne SRL, Tres de Febrero 3254, 1429 Buenos 10Hz - phase meter; peak programme PM5165: sweep generator, sine square and triangle Aires. Phone: 701.8622. crosstalk meter; meter; true RMS voltmeter; wow and flutter meter; waveforms, four decades per sweep, 0.1 Hz- 1MHz, 900A: audio frequency generator covering 15Hz to internal rumble meter; noise meter with plug -in filter variable sweep width and speed, also 150kHz in four ranges. frequency digital feq. display. options; and digital counter. sawtooth generator and ANM3/ANM4: ANM3 switchable quasi -peak or true PM6307: wow and flutter meter, 3,000 or 3,150Hz RMS noise meter with DIN, IEC A and CCIR tones, crystal controlled, separate drift and flutter. SOUND TECHNOLOGY (USA) Sound Technology Inc,1400 Dell Avenue, Campbell, weightings; ANM4 average responding noise meter Cal 95008. Phone: (408) 378.6540. Telex: 357445. with modified CCIR filter. Sensitivity of both POTOMAC (USA) UK: Precision Audio Marketing, Bimini House, selectable in 16 ranges from - 100dBmto + 50dBm. Potomac Instruments Inc, 932 Philadelphia Avenue, Christchurch Road, Virginia Water, Surrey. Phone: RA200IADS1: frequency response analyser with Silver Springs, Maryland 20910. Phone: (301) 09904 4416. CRT display featuring variable sweep generator; 589-2662. 1500A: tape recorder test system with CRT display; various sweep modes; and variable I/O levels.ADS1 AG -51: audio generator with low distortion 20Hz to explanatory alphanumerics; optional hard copy; is an optional display store allowing four different 200kHz sinewave generator; SMPTE standard inter - measures frequency response, 2nd and 3rd curves to be stored and simultaneously displayed. modulation signal generator; fixed 3.15kHz harmonic distortion relative to record level, wow LD0415: low distortion oscillators covering tile frequency for wow and flutter. and flutter, wow and flutter spectral components, range 10Hz to 100kHz in four ranges; generate sine AA -51: audio analyser. Automatic multipurpose noise and noise spectrum, speed accuracy and or square waves. LD04 mains powered, 10V output; system; THD distortion meter covers fundamentals drift, channel separation v frequency, and head LD05 battery powered, 3V output. from 20Hzto20kHzwith 100kHz bandwidth; internal azimuth accuracy. Noise measurement is to NAB, DMS415: battery powered harmonic distortion distortion and noise 0.04 %; IM distortion meter ANSI or CCIR /ARM - flutter to NAB, JIS or measuring sets for use with the LD04/5. accepts 60Hz and 7kHz SMPTE frequencies; AC DIN /ANSI. Automatic measuring with left and right voltmeter i mVto 100V range; phase meter has + 54° channels. Various options available. WHITE (USA) and + 180° full scale with 3° resolution; ratio meter 1410A: ultra low distortion signal generator; push- White Instruments Inc, PO Box 698, Austin, Texas has +6dB range; wow and flutter meter. button tuned over range 10Hz to 110kHz with 78787. Phone: (512) 892-0752. AT -51: combined AA -51 and AG -51. 0.001% distortion; provides both sine and SMPTE UK: Scenic Sounds Equipment Ltd, 97 -99 Dean IM signal. Street, London W 1 V 5RA. Phone: 01.734 2812. Telex: PYRAL (France) 1400A: as 1410A but no IM output or dB attenuators; 27939. only variable voltage 1 mV to 3V. Model 140: realtime 27 band 1/3- octave spectrum Pyral SA, 47 rue de l'Echat, F -94001 Creteil. Phone: measurement system; (1) 207.48.90. Telex: 23742. 1700B: distortion analyser with an LED matrix display; range 40Hz to over range 10Hz to UK: Pyral Magnetics Ltd, Courtlands Road, pushbutton tuned oscillator 16kHz; built -in pink noise generator. measures 301IV to Eastbourne, Sussex. Phone: 0323 638965. 110kHz; fully automatic nulling; System 200: realtime 30 band 1/3- or i- octave 300V; provides measurement down to USA: Gotham Audio Corp, 741 Washington Street, distortion spectrum analyser with microprocessor control in 5s; measures power across 80. Options New York, NY 10014. Phone: (212) 741 -7411. Telex: 0.002% and LED matrix display. Range 25Hz to 20kHz level when measuring distortion; 129269. for automatic set (1/3- octave), 40Hz to 1.12kHz t;- octave); eight IM distortion analyser and switch selectable meter ASA3: realtime 28 -band 1/2- octave analyser using microprocessor controlled memories for storing from 40Hz to 20kHz; response. filter levels. Options Include standard response bargraph displays; bands 1700Bbut lower residual 0.25dB resolution on 25dB scale; two memories; 1701A:similarto distortion curve memory for comparison purposes and an RT6o RMS or peak meter option for pink noise generator or sine sweep and noise; average or true analysis option. generator; 25dB or 50dB ranges. reading; 6V output; 10dB /step attenuator. 1710A: similar to 1700B but oscillator output Germany) adjustable from -89.9 to + 26dBm in 0.1dB steps; WOELKE (West RACAL-DANA (UK) sensitivity 7000 to 100V; measures power Woelke Magnetbandtechnik GmbH, Woelke- - 80dBm to + 40dBm; balanced inputs. Strasse 2 -3, D-8069 Schweitenkirchen. Phone: Racal -Dana Instruments Ltd, Duke Street, Windsor, 08444 394. Telex: 55547. 69811. 847013. 1020A: FM alignment generator. Berks SL4 1SB. Phone: 07535 Telex: UK: Lennard Developments Ltd, 206 Chase Side, Inc, 18912 Van USA: Racal Dana Instruments Enfield, Middx EN2 OQX. Phone: 01-363 8238. Korman Avenue, Irvine, Cal 92715. Phone: (714) JE SUGDEN (UK) USA: Audicon Inc, 1200 Beechwood Avenue, 833-1234. Nashville, Tennessee 37212. Phone: (615) 256 -6900. 10Hz JE & Co Ltd, Carr Street, Cieckheaton, West 9083: 2 -tone signal generator covering to Sugden Telex: 554494. Yorks BD19 5LA. Phone: 0274 872501. 100kHz; two alternate or mixed tones. ME105: wow and flutter meter with 3,000 or 3,150Hz 5Hzto 20M Hz; range 1011V 453: signal generator covering 13Hz to 30kHz in six 9300:true RMS voltmeter; oscillator; input sensitivity 3mV to 20V; drift to 300V. ranges; sine and squarewaves; battery operated. measurement ±0.1 % to + 10%; flutter from 0.03% 451: AC millivoltmeter; five ranges. unit; input sensitivity to 3 %; to DIN, IEC and ANSI standards. RE (Denmark) 452: distortion measuring ME106 Series: wow and flutter meters with 3,150Hz 300mV 3V; over 15Hz to 20kHz, Radiometer Electronics AIS, Frederikssundsvej to notch tunable oscillator; input sensitivity 3mV to 30V; drift 0.5% to manual tuning of notch filter for null; LF cut filter; 254, DK -2700 Bronshoj. 5 %; flutter0.1% to 3 %; to DIN, CCIR, ANSI and IEC USA: Radiometer Electronics US Inc, 811 Sharon requires external oscillator and millivoltmeter. standards. Drive, Cleveland, Ohio 44145. Phone: (216)871 -7617. ME108 Series: similar to ME106 but only single drift Ltd, House, High UK: Danbridge (UK) Sherwood TEKTRONIX (USA) range of 5 %. Street, Crawthorne, Berks RG11 7AT. Phone: 03446 ME110 Series: similar to ME108 but with single 2369. Tektronix Inc, PO Box 500, Beaverton, Oregon 97077. Phone: (503) 644 -0161. meter switchable to read single ranges for either RE402: wow and flutter meter; crystal controlled drift or flutter. oscillator with 3k or 3.15kHz; digital display of drift UK:Tektronix (UK) Ltd, Beaverton House, PO Box69, Harpenden, Herts. Phone: 05827 63141. Telex: ME301C: wave analyser with six range tunable filter in %; sensitivity 3mV; six ranges for flutter covering covering 1Hz to 1kHz; used in conjunction with DIN, NAB and JIS standards. 25559. 0.03 to 10% TM500 external meter or plotter. RE403: wow and flutter analyser using LED matrix AA501: bandpass filter /amplifier for the system. Tunable bandpass filtering 10Hz to 100kHz; ME401: automatic distortion meter with built -in display; realtime frequency analysis using digital 333Hz oscillator; single scale covering 0.2% to filter equivalent to 30'/3- octaves over range 0.2 to sine wave generation to 35kHz; up to 500x gain. SG505: for the TM500 system; covers 10 %; level from - 20dB to + 10dB. 200Hz with 10 steps in each band. oscillator 10Hz to 100kHz sine wave. SG502: oscillator for the TM500 system; covers 5Hz XEDIT (USA) RCF (Italy) to 500kHz sine and square waves. Xedit Corp, 133 South Terrace Avenue, Mt Vernon, Radio Cine Forniture, 43029 S Maurizio, Via Notavi, 5L4N: spectrum analyser with CRT display; covers NY 10550. Phone: (914) 668 -0388. Milan. Phone: 0522 24.01.42. range 20Hz to 100kHz; dynamic range on screen Model 20P116P115P: portable drift and flutter meter UK: Covemain Ltd, Dunchurch Trading Estate, 80dB; auto resolution; built -in tracking generator; with three ranges for 0.05% to 5 %, and drift +5 %; London Road, Dunchurch, Rugby CV239LL. Phone: 20Hz to 20kHz log sweep; may be plugged into any oscillator either 3,000 or 3,150Hz. Model 20P DIN 0788 815020. Telex: 837537. 5000 Series oscilloscope mainframe. and JIS (RMS); 16P JIS (RMS); 15P DIN. 1111 48 STUDIO SOUND, FEBRUARY 1982

www.americanradiohistory.com analogue or digital master tapes?

'/2" STEREO REVISED TECHNOLOGY THE FUTURE Although digital audio recording will eventually As more and more US recording studios switch Until such time that we will have consumer become commonplace, it is as yet beyond the to this revived recording format, and as the word electronics available to the ordinary man in the pockets of most studios with the result that users spreads in the UK, MCI, always with the leaders, street, whereby he will be able to hear the advan- and manufacturers alike are looking again at the announces the introduction of the JH1l0B -21/2 tages of digital recording, one can argue the analogue recorder and wringing more half -inch stereo mastering machine. At the same .advantages of inserting a digital link in what has performance from the technique. The result is time, a conversion kit enabling existing /< inch been hitherto a totally analogue chain. Maybe we that masters running at 30ips wound on I4in. JH110B users to update to 1/2 inch, is made shall have to look at a different system, which spools and wider track formats such as stereo on available. does not need expensive clocking in and out of /zin. tape are becoming popular. the information, before society as a whole can go digital.

Why is this happening? In recent years, digital audio and in particular digital audio recording have been looked upon as the ultimate goal, the crock of gold at the end of the rainbow, but at what cost? A stereo system using PCM recording on U -matic format VTR costs in the region of In the meantime, at MCI, efforts are being £20,000 for the basic unit. In addition, because a made and research carried out to carry the indus- cartridge is used in which physical access to the try forward to better and more economical ways tape is impossible, electronic editing becomes of recording sound. No one in the industry will imperative. This virtually doubles the cost (and a deny that digital recording will eventually be with razor blade costs l0p!) us, but until such time as equipment can be manufactured (and serviced!) at a more realistic cost, the 1/2 inch format does represent a significant step forward in quality.

SIGNAL -TO -NOISE RATIO

Financial constraints therefore force most recording studios to look for an alternative which will get acceptably close to what can be achieved with digital equipment. That crock of gold has been glimpsed, but what can be done to at least get nearer to it, using what we have already? The half -inch stereo format seems to be the way to go, since signal to noise ratios in excess of 75dB can be achieved depending on recording level chosen. Peaking, for argument's sake, at 6dB above 510 nWb /m which the MCI 2 -track machine will allow, if used with Grand The JH 110B -2'h is at present the only Master tape, signal to noise ratios close to 80dB machine with three speeds and 14ín. spool capability -the can be reached without the distortion exceeding latter absolutely essential to hold one complete Q/n I album side at 30ips. Surprisingly enough, choosing 1/2 inch format, rather than '/a inch, adds less than £200 to the bill.

These developments are merely hypothetical if In fact many engineers have been very a disc cannot be cut from a tape that has been surprised at the subjective changes they have recorded in the new format. The disc mastering \\\ detected which are not necessarily revealed in machine is as important as any other step in the MCI (PROFESSIONAL bold performance figures. All over the USA the recording chain. MCI has for some years been industry has been talking about the move to 1/2 able to meet this demand with its Disc- mastering STUDIO EQUIPMENT) inch stereo. The word is spreading -"The sound machine, the JHI IOM. This mastering machine LTD. is bigger" - "The top end is effortless " -"... the manufactured by MCI is unique in that it is again trend is taking off . . . ' -and, perhaps most the only one to take 14ín. spools and also is a MCI House, revealing -"The sound is very close to digital" three speed machine (19/38/76 cm /sec). The 54 -56 Stanhope Street, are typical comments. One company executive is features do not end there, however. Another London quoted as saying -"It's going to give analogue a standard feature is the RTZIIIM, a micro- NW1 3EX. new breath of fresh air for some time, especially processor controlled tape position indicator, Telephone: 01 -388 7867 compared to what it auto -locator takes to go digital." - and tape velocity indicator with 20 Telex: 261116 "Once the word spreads about how good it extra scratch -pad memories for such functions as sounds, the demand is going to get even expand, band and lead -out for automatic control stronger." of all currently available lathe systems.

www.americanradiohistory.com EMT (Switzerland) PRO -CO (USA) EMT Franz GmbH, Postfach 1520, D -7630 Lahr, Pro -Co Sound Inc. 135 E Kalamazoo Avenue, West Germany. Phone: 07825 512. Telex: 754319. Kalamazoo, Michigan 49007. Phone: (616) 342-0269. UK: FWO Bauch Ltd, 49 Theobald Street, Boreham Wood, Herts WD6 4RZ. Phone: 01-953 0091. Telex: Mic and line level cables using Belden cable. 27502. USA: Gotham Audio Corp, 741 Washington Street, PRO SOUND (USA) New York, NY 10014. Phone: (212) 741 -7411. Telex: Pro Sound, 13717 S Normandie Avenue, Gardena, interconnectionuid¢ 12969. Cal 90249, USA. Phone: (213) 770.2330. Specially designed range for audio applications Coloured mic cables with Switchcraft XLR -type or with 'Reusen' shielding which gives high degree of miniature QG connectors. ALPHA (USA) sound protection. Alpha Wire Corp, 711 Lidgerwood Avenue, PROPHON (UK) Elizabeth, New Jersey 07207, USA. Phone: (201) FUTURE FILM (UK) Prophon Sound Ltd, 90 Wilsden Avenue, Luton LU1 925.8000. Future Film Developments, 36/38 Lexington Street, 5H R. Phone: 0582 30726. UK: Alpha Wire Ltd, Central Way, North Feltham London W1R 3HR, UK. Phone: 01.437 1892. Telex: Trading Estate, Feltham, Middx. Phone: 01 -751 21624. MX8A, MX16A: active stage boxes with jack or XLR 0261. Telex: 8813660. connectors; 15Hz to 20kHz bandwidth and 20dB Durable mic cables with ' Reusen' shielding and gain. Extensive range of wire and cables suitable for multipair cables -M Series to 51 pairs and J Series audio and transmission use. to 32 pairs. SGAL (UK) Steve Graham Audio Ltd, 20 Victoria Road, New AUDICON (USA) GOTHAM (West Germany /Austria) Barnet, Herts EN4 9P F, UK. Phone: 01-449 Audicon Marketing Group, 1200 Beechwood Gotham Audio Corp, 741 Washington Street, New 3663/4044. Telex: 8955127. Avenue, Nashville, Tenn 37212, USA. Phone: (615) York, NY 10014, USA. USA: Canford Audio(USA) Inc, 652 Glenbrook Road, 256.6900. Phone: (212) 741.7411. Telex: 129269. Stamford, Conn 06906. Phone: (203) 324 -2889. UK: Trad Electronic Sales Ltd, 149b St Albans Road, UK: FWO Bauch Ltd, 49 Theobald Street, Boreham Telex: 643678. Watford WD2 585. Phone: 0923 47988. Telex: Wood, Herts WD6 4RZ. Phone: 01 -953 0091. Telex: 262741. 27502. Musiflex, Studioflex and Phonoflex: coloured mic cable and multicore cable for stage boxes. Range of multicore cable available in 32, 24, 10, 8, 4 High quality mic cables with double layer 'Reusen' or single pair configurations. shielding. Modular stage link systems including cables, connectors and stage boxes; multipair cables BELDEN (USA) ILLINOIS (USA) available in six to 31 pairs. Belden Corp, PO Box 1331, Richmond, Indiana Illinois Cable Company, 8225 N Christiana, Skokie, 47374, USA. Phone: (317) 966 -6661. Illnois 60076, USA. Phone: (312) 679-0160. SOUND APPLICATIONS (USA) UK: Leonard Wadsworth & Co (Electronics) Ltd, Sound Applications Ltd, 342 Lexington Avenue, Warehouse Block F, Imber Court Trading Estate, 2- and 3- conductor shielded cable, and multipair Mount Kisco, NY 10549, USA. Phone: (914)241.0034. Orchard Lane, East Molesey, Surrey KT8 ODA. cable available in three to 27 pairs in 7 x 30 or Phone: 01-398 4288. Telex: 264028. 16 x 30 gauge. Coloured audio cables 20- or 24- gauge, for guitars, headphones, mics and speakers. Vast range suitable for most electrical and electro- LECTRIFLEX (UK) nic applications. Lectriflex Cables & Accessories Ltd, The STATESIDE (USA) Paddocks, Frith Lane, Mill Hill, London NW7 1PS. Peavey Electronics Corp, 711 A Street, Meridan, BICC (UK) Phone: 01.349 2011. Telex: 28915. Mississippi 39301, USA. Phone: (601) 483-3565. BICC General Cables Ltd, Helsby, Warrington, UK: Peavey Electronics (UK) Ltd, Unit 8, New Road, Cheshire WA6 ODJ, UK. Phone: 092-82 2700. Instrumentation cables in single to 100 pairs. Ridgewood, Uckfield, Sussex TN22 5SX. Phone: 0825 5566. PVC and polythene insulated cables including LEMO (UK) multipairs, mic and loudspeaker leads. Lemo (UK) Ltd, 12 North Street, Worthing, Sussex Straight or curled stage leads using Belden cable BN11 1 DU. Phone: 0903 34543. and Switchcraft jacks. BOFA (Sweden) Cliff Electronic Components Ltd, 97 Coulsdon Range of coloured tapered cable sleeves and TECHNICORD (UK) Phone: 0883 B Road, Caterham, Surrey CR3 5NF, UK. socket identification washers for standard and Technicord Ltd, Melbourn House, 2 Black Bank 47713. Telex: 8813346. range connectors. Road, Little Downham, Ely, Cambs CB6 2TZ, UK. Phone: 035387 721. Low cost aluminium foil screened cables with KEITH MONKS (UK) integral drain wire (not flexible) and overall Keith Monks (Audio) Ltd, 26.28 Reading Road, Coloured audio leads with Switchcraft XLR-type screened multicore cables and stranded South Fleet, Aldershot, Hants, UK. Phone: 02514 connectors; 'Reusen' screened ultra -flexible conductors. 20568. Telex: 858606. equipment cable: equipment lead. USA: Keith Monks (USA) Ltd, 652 Glenbrook Road, BIW (USA) Stamford, Conn 06906. Phone: (203) 348-4969. TROMPETER (USA) 65 Bay Street, Boston Insulated Wire & Cable Co, Inc, 8936 Comanche Phone: (617) 265-2102. Trompeter Electronics Boston, Mass 02125, USA. CD1, CD2, CD3: stackable cable drums. Avenue, Chatsworth, Cal 91311. Phone: (213) Telex: 940604. 882 -1020. Wire (UK) Ltd, 1 Canbury Park UK: Boston Insulated NEK (Norway) UK: Lee Engineering Ltd, Napier House, Bridge KT2 6JY. Phone: Road, Kingston -upon- Thames, Norsk Elektrisk Kabelfabrik, Etterstadkroken 9, Street, Walton -on- Thames, Surrey KT12 1AP. 01 -546 3384. Telex: 21885. PO Box 23, Bryn, Oslo 6. Phone: (02) 67.41.80. Telex: Phone: 09322 43124. 18001. of cables for OB and Specialist manufacturer UK: NEK (UK) Ltd, 88 Easton Street, High Wycombe, Range of patch cords, cable assemblies, plus studio use. Bucks. Phone: 0494 447024. twinax, triax, and quadrax cables. CANFORD AUDIO (UK) Wide range of mic and multipair cables from two to WHIRLWIND (USA) Ryton, Tyne and Canford Audio, Stargate Works, 10 pairs. Whirlwind Music Inc, PO Box 1075, Rochester, NY Phone: 089422 4515. Telex: Wear NE40 3EX, UK. 14603, USA. Phone: (716) 663 -8820. 537792. NEUTRIK (Liechtenstein) UK: Atlantex Music Ltd, 34 Bancroft, Hitchin, Herts USA: Canford Audio (USA) Inc, 652 Glenbrook Road, Neutrik AG, Obergass 16, FL -9494 Schaan. Phone: 1 Phone: 0462 31511. Telex: 826967. 324-2889. SG5 LA. Stamford, Conn 06906, USA. Phone: (203) 075 2.63.83. Telex: 643678. UK: Eardley Electronics Ltd, Eardley House, 182/4 Straight or curled instrument and mic cables with Campden Hill Road, London W8 7AS. Phone: 01 -221 high quality jacks; patch cords from 1ft length. Mk2: 3 -way -audio cable Automatic cable tester 0606. tester with seven test sequences. Medusa multiple wiring system: multiway systems K- Check: mic cable tester. with stage boxes, multicores and multiple DAVU (UK) connectors for mixer. Davu Wire & Cables Ltd, Harrow Manorway, Abbey PANDUIT (UK) Phone: 01.310 7036. Wood, London SE2 9AA, UK. Panduit Ltd, Lordswood Ind. Estate, 61/65 Revenge WIREWORKS (USA) Telex: 896767. Road, Chatham, Kent ME5 8YT. Phone: 0634 Wireworks Corp, 380 Hillside Avenue, Hillside, New 660811/5. Jersey 07205, USA. Phone: (201) 686-7400. Telex: Mic and subminiature cables. 710 -985 4675. Range of cable ties, cable ducting, wiring aids and EDCOR (USA) accessories. TE -2: mic cable tester with XLR and 14 in jack Edcor 16782 Hale Avenue, Irvine, Cal 92714. Phone: sockets. (714) 556-2740. PLAN AUDIO (UK) Plan Audio, 27B Bell Street, Reigate,Surrey. Phone: Range of hardwired mic multicable systems Multiplex Snake: mic cable transmission system Reigate 22249. comprising stage box, multicore and individual XLRs. accepting up to eight audio signals over a single tails for mixer; mic cables with Available in balanced or unbalanced Powerline: range including instrument cables with mic cable. range. 52 encoder /decoder versions. lacks and mic and speaker cables. Bandits: cable marking system

50 STUDIO SOUND, FEBRUARY 1982

www.americanradiohistory.com I ncredble...'1 the "Acoustic Chamber Synthesizer.'

the XL -305 by

Totally new design approach

The sound of a live acoustic chamber Natural sound, even on percussion Self- contained rack mount unit Full two- channel stereo

The Master Room XL -305 is a totally new design approach in reverberation technology. For the first time, the qualities and properties of a live acoustic chamber are available in a rack mount unit at an affordable price. There is a natural sound on percussion, as well as voices and all other musical instruments. This quality has not been obtainable from other compact reverberation devices. The XL -305 exhibits no unwanted side effects; it's as natural as a live chamber itself.

To hear this new advancement in reverberation, see your professional audio dealer and ask for a demonstration of this exciting new unit. Hear the XL -305 "Acoustic Chamber Synthesizer" for yourself, and you too will agree . . . It's INCREDIBLE.

France 3M . Scenic Sounds Equipment, France SA, Mincom Div Boulevard de l'Oise, 95000 Cergy Tel : Paris 749 027

97 -99 Dean Street, Germany Audiolive Kyffhauserstrasse l0A 5 Koln 1 Tel : Koln 230910 London 1 Holland W V 5RA Pieter Bollen Geluidstechnik Hastelweg 6, Eindhoven Tel : Eindhoven 512 777 / : Telephone 01 -734 2812 3 4 5 Sweden Tal & Ton Musik & Electronic AB Kungsgatan 5, 411 -19 Gothenburg Tel : Gothenburg 130 216 : Telex 27 939 SCENIC G Norway Siv Ing Benue AS Skovvn 22, Oslo 2 Tel : Oslo 565 753

www.americanradiohistory.com I. i ADC (USA) ADC Products, 4900 W 78th Street. Minneapolis, Minn 55435. Phone: (612) 835-6800. Telex: 290321. UK: Allantex Music Ltd. 34 Bancroft, Hitchin. Herts SG5 1 LA. Phone: 0462 31511. Telex: 826967. AMPHENOL -TUCHEL (West Germany) USA: Amphenol Connector Division. Buker Ramo Corp, 2801 S 25th Avenue. Broadview. Illinois 60153. Phone: (312) 345 -9000. Telex: 910 -226 1974. UK: Future Film Developments, 36/38 Lexington Street. London W 1 R 3HR. Phone: 01 -437 1892. Telex: 21624. AUDIO ACCESSORIES (USA) Audio Accessories Inc, Mill Street. Marlow, New Hampshire 03456. Phone: (603) 446.333. UK: Technicord Ltd. Melbourn House. 2 Black Bank Road. Little Downham. Ely. Cambs CB3 2TZ. Phone: 035387 721. CAE (UK) Communication Accessories & Equipment Ltd, 70182 Akeman Street, Tring, Herts HP23 6AJ. Phone: 044282 4011. Telex: 82362. CANFORD (UK) Canford Audio, Stargate Works. Ryton. Tyne & Wear NE40 3EX. Phone: 089422 4515. Telex: 537792. USA: Canford Audio (USA) Inc. 652 Glenbrook Road. Stamford. Connecticut 06906. Phone: (203) 324.2889. Telex: 643678. CANNON (USA) ITT Canon Electric. 666 East Dyer Road, Santa Ana. Cal 92702. Phone: (714) 557.4700. UK: Future Film Developments. 36/38 Lexington Street. London W 1 R 3HR. Phone 01.437 1892. Telex: 21624. CLIFF Cliff Electronic Components Ltd. 97 Coulsdon Road. Caterham. Surrey CR3 SN F. Phone: 0883 47713. Telex: 8813346. DELTRON (UK) Steve Graham Audio Ltd, 20 Victoria Road, New Barnet. Herts EN4 9PF. Phone: 01.449 366314044. Telex: 8955127. USA: Canford Audio (USA) Ltd. 652 Glenbrook Road. Stamford. Conn 06906. Phone: (203) 324.2889. Telex: 643678. FUTURE FILM (UK) Future Film Developments 36138 Lexington Street, London W1R 3HR. . Phone: 01.437 1892. Telex: 21624. MOSSES & MITCHELL (UK) Mosses & Mitchell Ltd. Wydon Lane, Farnham, Surrey GU9 BOL. Phone: 0252 721236. Telex: 858820. NEUTRIK (Liechtenstein) Neutrik AG, Obergass 16, FL -9494 Schaan. Phone: 075 2.63.83. Telex: CH. 77771. UK: Eardley Electronics Ltd. Eardley House. 182/4 Campden Hill Road. London W8 7AS. Phone. 01.221 0606. Telex: 299574. USA: Philips Audio Video Systems Corp. 91 Mckee Drive, Mahwah. New Jersey 07430 Phone: (201) 529-3800. RENDAR (UK) Wilmot Breeden Electronics Ltd. Durban Road, Bognor Regis. West Sussex P022 9RL. Phone: 0243 825811. Telex: 86120. SWITCHCRAFT (USA) Switchcraft Inc. 5555 North Elston Avenue. Chicago, Illinois 60630. Phone: (312) 792.2700. Telex: 910.221 5199. UK: FWO Bauch Ltd. 49 Theobald Street. Boreham Wood. Herts WD6 4RZ. Phone: 01.953 0091. Telex: 27502. SYMETRIX (USA) Symetrix Inc. 109 Bell Street, Seattle, Washington 98121. Phone: (206) 824.5012. TECHNICORD (UK) Technicord Ltd. Melbourn House. 2 Black Bank Road, Little Downham. Ely. Cambs CB3 2TZ. Phone: 035387 721. USA: Audio Accessories Inc. Mill Street. Marlow. New Hampshire 03456. Phone. (603) 446.3335. TRIMM (USA) Trimm Inc, 400 Westlake Street, Libertyville, Illinois 60048. Phone: (312) 362. 3700. UK: Future Film Developments. 36/38 Lexington Street. London W 1 R 3HR. Phone: 01.437 1892. Telex: 21624. TROMPETER (USA) Trompeter Electronics Inc, 8938 Comanche Avenue. Chatsworth. Cal 91311. Phone: (213) 882.1020. UK: Lee Engineering Ltd. Napier House. Bridge Street. Walton-on- Thames. Surrey KT12 1AP, Phone: 09322 43124. TURNKEY (UK) Turnkey, 8 East Barnet Road. New Barnet, Herts EN4 8RW. Phone: 01.440 9221. Telex: 25769.

52 STUDIO SOUND, FEBRUARY 1982

www.americanradiohistory.com Otari Electric Co., Ltd. 4 -29 -18 Minami -Ogikubo, Suginami -ku Tokyo 167. Japan Phone: (03) 333-9631, Telex: J26604

OTARI MIR-10-2 The most advanced studio / broadcast master recorder

Bridging the gap between the new technology and exclusive multiple edit modes, reverse play, old reliability, it's the logical extension of the standard alignment level presets, and dual -mode innovative technology built into our multichannel varispeed. Other features include controlled wind, MTR -90. The new MTR -10 -2 gives the professional un- preset master bias switching, three speeds and precedented control: IEC, AES and NAB selectable. Also it includes Measurable and audibly discernible performance return -to -zero and offers an optional tape locator improvements. More than chips and buzz words, with ten position memory and tape shuttle. a balanced engineering approach: adjustable phase DIN -head version is available. compensation with internal square /sine wave gen- Comprehensive servicing and support. Fully modular erator; electronically balanced I/O with direct power supply, audio and transport electronics card coupled outputs. frame. A highly dedicated distributor service net- Full servo, D.C.PLL transport governed by an work with factory trained and supported technicians. on -board microprocessor - an industry first. For full details of the heavy-duty machine, please Unmatched production features - contact us.

www.americanradiohistory.com Connectors from ITT- Cannon, Neutrik and Switchcraft

THIS is all very well and stan- Whereas only a few years ago only the broadcasting Association of Public Address dardisation is a highly desirable stations and professional recording studios were using Engineers (as it then was) in publish- objective in any industry. But is it in the XLR -type connector for their microphone and other ing a recommended practice fairly fact standard? today they are used early on which, due to the Associ- The answer unfortunately is no- low level audio signal circuits, ation's work on various standards as a general not by a long way- and it is the aim throughout the audio industry worldwide committees and the presence of BBC of this article to try to air some of purpose connector. Almost every studio and PA instal- engineers on its own council, turned the problems, difficulties and mis- lation is equipped with them and even amateur record- out to be in line with the international understandings that have arisen ing enthusiasts at home are using small mixing desks standards that followed soon after. since the XLR -type connector came and microphones which come fitted with XLR -type But meanwhile, in the music into widespread use. connectors as standard equipment. industry and in many commercial recording studios, a lot of new equip- History and chaos figuration whereby increasing there being a 50V phantom power ment was being imported from The XLR -type of connector was ori- potential follows increasing pin supply wired across microphone cir- America with the American wiring ginally conceived in America by numbers (ie for a balanced audio cuits. The female versions of the system. Also, many European manu- were Cannon Electric many years ago to circuit, contact I is screen, contact 2 XLR -type connectors make facturers trying to export meet a demand for a reliable, heavy is return and contact 3 is signal), inadvertent access to the live contacts equipment to America, so the studio duty, general purpose connector for while in Europe, a system whereby very difficult indeed thereby reduc- and music industry generally formed the nucleus a audio and communications contact 1 is screen, contact 2 is signal ing the possibility of damage to of European -based applications that was physically and contact 3 is the return, was equipment or even of electric shock. faction using the American system smaller than the already widely used adopted. So the wiring is also So in one sense things began to for reasons of commercial conveni- Cannon EP series connectors. The different. Little wonder that there is improve with manufacturers on both ence. As new manufacturers and new connector was immediately all this confusion! sides of the Atlantic at least using new users appeared on the market, seized upon by broadcasting and Before long however, the the connectors the same way round they adopted one system or the other studio organisations in America and Americans did change over to using if not using a compatible wiring con- according to which faction of the Europe but unfortunately, the two the female connector as the input figuration, but this remaining differ- market they found themselves in- continents adopted quite different receptacle -not only because this ence has been the cause of widespread all of course quite convinced that methods of wiring and usage which system was by then in widespread confusion and irritation. With their system was the right one and has led to considerable difficulty and use in Europe and that American remarkable rapidity, the European often totally unaware that any other confusion over the years. Initially, manufacturers were finding wiring system was adopted by the system existed. many American manufacturers used difficulty in selling their products in BBC in all their studios throughout the three contact male connector (ie Europe for this reason, but also the UK and by many other broad- Standardisation at last the one with protruding pin contacts) because it was common sense to casting authorities throughout In an attempt to come to an interna- as the input receptacle into equip- have it that way round. If you think Europe. This meant that in order to tional agreement and to end all this ment while in Europe, the female about it, it makes much more sense be compatible. manufacturers and confusion, the Electro- acoustics connector (ie the one with shrouded to protect the very sensitive input suppliers of equipment (and private Technical Committee of the IEC sockets) was adopted for this same circuits to a desk by shrouding than studios working for the broadcasting (International Electrotechnical Com- purpose. So immediately, there was to leave them exposed on protruding authorities) also adopted the same mission) meeting in Stresa in 1969 a problem of mechanical non - pins where they can inadvertently system. set the wheels in motion to arrive at interchangeability across the come into contact with anything that The industrial and commercial an internationally agreed standard. Atlantic. To make matters worse, happens to be lying around-especi- public address industry followed suit After further meetings in Oslo during the Americans went for a pin con- ally with the increasing likelihood of due largely to the foresight of the 1971, a draft standard was submitted 64 STUDIO SOUND, FEBRUARY 1982

www.americanradiohistory.com to the various national committees of the IEC in 1973 and was finally TABLE 1 TABLE 2 adopted and issued as IEC standard Contact 2 'hot' (IEC No 268 part 12 under the title CONNECTIONS FOR XLR/3 AND XLR/5 TYPE CONNECTORS standard) Amek UK Circular Connectors for Broadcast ACCORDING TO IEC -268 PART 12 AND BS 5428 PART 5/3 Alice Stancoil UK and Similar Use in 1975. The signa- Canary UK tories to the agreement were Australia, HH Electronics UK Single- channel circuits using XLR/3 type Belgium, Canada, Denmark, Egypt, connector Turner UK Israel, Netherlands, Balanced Unbalanced Yamaha Japan Hungary, Japan, Electrovoice USA Contact 1 return Norway, Romania, South Africa, Screen Screen and Germany Contact 2 Signal Signal Sennheiser AKG Austria Sweden, Switzerland, Turkey, the Contact 3 Return No connection' UK and USA, so in theory at least, it Roland Japan should be a truly international standard. Twin -channel (stereo) circuits using XLR /5 type connector Contact 3 'hot' (`American To add further credence to its use Balanced Unbalanced standard') RSD ( Studiomaster) UK Contact 1 Screen Screen and common return in the UK, the IEC standard was Allen & Heath Contact 2 Left-hand channel signal Left -hand channel signal Brenell UK adopted by the British Standards Midas UK Contact 3 Left-hand channel return No connection' UK Institution in 1980/81 and has now Contact 4 Right -hand channel signal Right -hand channel signal Soundcraft KlarkTeknik UK been issued in the Contact 5 Right -hand channel return No connection' UK as BS 5428, Shure USA part 5, section 3. 'If it is intended that an unbalanced input should also be able to accept EV -Tapco USA The stanaara aaopts the 3- contact an input signal from a balanced source then contacts marked as No Audio & Design Record- connection' above should be commoned to `contact 1' on the equipment mic ing UK XLR -type connector for and input receptacle. MXR Innovations USA low level audio lines for single- channel (mono) circuits and the 5- contact XLR -type connector for 2- channel (stereo) circuits. The input countries would agree to support a they are using the 'American' or high -level circuits and the attendant receptacle to equipment is given as standard that was different from 'European' system. Those manufac- possibility of damage to equipment the female half having socket another standard already in force, turers that are using whatever system through inadvertent wrong connec- contacts, which is in agreement with nor would they be likely to introduce for their low -level input connectors tion. The second is that although the generally adopted practice as we a new national standard that was are generally using the same signal is coming out from pin have already discussed. The contact different from the international configuration for their loudspeaker contacts as recommended in the IEC usage is given in Table 1. standard they had already agreed to! connectors and in order to differen- document, the IEC recommendation The IEC 268 standard also makes So in effect, we are not really any tiate between input and output is concerned with low -level signal provision for two common forms of better off than we were before the connectors on a power amp, the circuits and not power circuits. The phantom powering for capacitor standard was introduced. male connector is being used as the practice in power engineering is that mics to be incorporated into the Just to illustrate this point, Table 2 output connector from an amp and all live power outlets are shrouded balanced circuit wiring configuration: shows the results of a very brief the female as the input receptacle to and invariably shuttered as well for Phantom powering: positive supply survey of manufacturers to find out a loudspeaker system. obvious reasons. It is clearly little voltage on both signal and return who is using which system. The It must be said that there is some short of folly to permit the output contacts survey is not exhaustive, but is degree of logic in this development. from a 700 or 800W power amp to Negative supply voltage on screen sufficient for the purpose. The The XLR /3 is a robust and durable appear on exposed pins of a male contact country of origin is also shown. connector and has a current rating connector where AC voltages of A -B powering: Positive supply volt- of 15A -which is quite sufficient anything up to 80V at currents of up age on signal contact(s) even for today's ever insatiable to l0A are present. Any outlet Negative supply voltage on return As a loudspeaker demand for more and more amplifier carrying that sort of signal should contact(s) connector power, and in keeping with this, it clearly be protected by having the Just to add further to this absurd can accept the fairly large diameter contacts enclosed within an insulated state of affairs, many manufacturers cables necessary for the inter- shroud -as is the case with the XLR - Did someone say of power amps and loudspeaker connection of high power amps and type female receptacle for instance. standardisation? systems have more recently adopted loudspeaker systems. So what alternatives are available: Setting out a standard is all very well the XLR /3 as a connector for loud- There are, however, two important In the absence of any recommenda- and very much needed, but getting a speaker circuits, generally using drawbacks. Firstly there is the tion from any of the standards fragmented industry to accept it is a contact 1 as earth and contact 2 or 3 obvious one of mechanical inter- authorities, a number of users and different matter altogether -or so it for the signal according to whether changeability between low -level and one or two professional associations would seem. Certainly, the standard have in the past proposed various has been adopted almost universally alternatives. by the broadcasting industry and in Back in 1974 the APAE as it then industrial and commercial public Terminology was, now the Association of Sound address, but in studios and the music For the purposes of this article the term 'XLR' will be used as a and Communication Engineers, industry, and the manufacturers and generic term for any and all connectors from any manufacturer issued a technical information sheet suppliers involved primarily with that are of the general type, and compatible with, the XLR range of TIS:2 in which the use of the XLR /4 that sector of the market, some are connectors as originally designed and manufactured by messrs was advocated, with the shrouded using the standard, but many -seven ITT -Cannon. Of the two terms in general use. ie 'Cannons- and female receptacle as the amp output years after its introduction -are 'XLRs', the latter seems the more appropriate as, whilst it is a pro- connector and with contacts 1 and 2 either totally unaware that any stand- prietary catalogue reference number, at least it avoids constant commoned as the return circuit and ard exists at all, or choose delibera- reference to one particular manufacturer by name throughout the contacts 3 and 4 commoned as the tely to ignore it in preference to what article and in the absence of a generic type designation by any of signal circuit. This makes a good is assumed to be the American the standards authorities. it is, in the opinion of the author, the deal of logical sense as it overcomes `standard' -ie with pin 3 'hot' most appropriate under the circumstances. the interchangeability problems instead of pin 2. The references to contact numbers on these connectors are between low -level signal circuits and In fact -or at least as far as my again those as marked on the actual connector inserts by ITT - loudspeaker circuits, it maintains the researches have been able to establish Cannon on their XLR series and which has been adopted by all leading earth contact concept which -there is no such thing as an other manufacturers known to the author at the time of writing. In is common to all XLR -type connec- American standard in published referring to the contact usage, the term 'signal' will mean the tors and it also, of course, retains all form; there is simply an established 'phase', `hot' or `positive' wire of a balanced pair and 'return' will the mechanical advantages of these. practice amongst manufacturers. mean the 'anti -phase'. or 'negative' wire. In the case of an Also, by parallelling of contacts it Also of course, America and Canada unbalanced circuit, it will be assumed that the 'return' wire and provides an increased current rating were both signatories to the /EC 268 screen are combined. standard, and it is unlikely that these 56 55

www.americanradiohistory.com purpose, with all the mechanical of screws altogether. In an attempt connection between equipment Standard ? advantages of the XLR -type design. to meet some of their competitors on wired on the two configurations How about an XLR /2 with two prices, Cannon have also now intro- simply means that the system will of 20A, as each contact in the XLR /4 really solid, high current contacts set duced the XLP series, which is not work as there will be no circuit is rated at IOA, not 15 as in the case in a resilient rubber shrouding and identical to the XLRs except that the continuity between equipment. It is of the XLR /3. with a larger than usual cable entry use of a plastic insert instead of extremely annoying having to re- Unfortunately, however, at about gland to permit the use of 2.5mm rubber has enabled the prices to wire all the leads immediately before the same time the Association of and 4mm csa twin cables -do you come down. a session or before a sound check in British Theatre Technicians, also read me over there in the ITT - a concert hall because one or two recognising the need for rationale in Cannon laboratories in the States?! newly delivered items of equipment this area, published a recommenda- are wired the wrong way round. tion to the theatre industry also Conclusions Also of course, the fault is not based on the XLR /4 but using a The problem is one of annoyance immediately obvious and it takes a completely different wiring configur- Commercial aspects more than anything else. If few minutes before the offending ation whereby if a loudspeaker wired As was implied at the start of this equipment having balanced ins and leads can be identified -especially to the ASCE recommendation is article, the one aspect that the IEC outs and wired to the IEC standard when you don't know which item of connected to an amp wired to the have not yet agreed upon in their is interconnected with equipment gear is wired which way round ABTT recommendation, the amp endeavours to provide an inter- wired to the 'American' system, the anyway. output terminals are shorted out! national standard is that of assigning result is simply a phase reversal Moving on to the loudspeaker The ABTT system had 100V line an IEC designation number, either across the balanced line. Whether connector problem, it is suggested loudspeaker circuits connected for the family of connectors or for this is important or not is up to the that for power amps intended for across contacts I and 2, and low the individual types. In the absence individual to decide and it is not fixed installation, the simplest impedance loudspeaker circuits of a universal, generic form of proposed to get into that argument immediate remedy is to fit heavy across contacts 3 and 4- which, reference, the industry at large here. If all the equipment in the duty insulated screw terminals to the apart from the fact that it does not continues to use the terms 'Cannon' signal chain is the same way round- rear panel of the amp -a practice satisfy various British and inter- already being adopted by many national safety requirements for use manufacturers -until such time as at 100V line level, was doubtless a the industry can agree on an accept- very useful arrangement for a fixed able loudspeaker connector. Even installation inside a theatre, and amps used on the road are usually many theatres are in fact wired in housed in flight case racks and have this way. However, realising the their input and output terminations problems created, the ABTT brought out to a separate plugging recommendation was withdrawn in panel anyway and it is then up to the 1979 pending further consultation, user to decide on the way he will but at the time of writing no alterna- interconnect his particular loud- tive was forthcoming. speaker system. Many systems built Another system employs the up in this way are actively crossed XLR /3 used the other way round so over with one bass amp, one mid that the female receptacle is on the and one hf or whatever housed in back of the amplifier, but wired with each rack with a special multiway the return sire on contact I and the cable and connector system feeding signal on contacts 2 and 3 linked. Neutrik 3 -, 4- and 5- contact female connectors the loudspeaker stacks, and there is Whilst this arrangement provides no no way that will ever be standardised mechanical differentiation between anyway. In most instances, it would input and loudspeaker connectors, it or 'XLR' ¡much to the annoyance of whether it be IEC or 'American', it is seem that the adoption of screw or does offer the safeguard that should ITT -Cannon -Ed] despite the fact surely of little consequence anyway. spring- retaining terminals would balanced - is a mie or other transformer that connectors of this general type The difficulty however in knowing provide an expedient and cost effect- coupled input be are now manufactured by many which equipment is wired to which balanced inadver- ive solution -even if only on a my survey tently connected to the loudspeaker companies around the globe. standard. In conducting temporary basis until Mr Cannon or output socket, the actual signal The XLR series of connectors as of manufacturers for this article I whoever can come up with an circuit k shorted out by the link, and actually manufactured by ITT - was amazed to discover that several acceptable alternative. the amp will see an open circuit Cannon are considerably more manufacturers did not even know -so To finish, it is felt that the reader at least no damage will expensive than their competition, which system they were using on result. should know the author's interests in However, the arrangement provides but they are also exceptionally their own products! More than one a this -basically, there are none to visit his factory no protection to the inadvertent robust and generally reliable due manufacturer had to other than professional concern. connecting of an unbalanced signal the use of a resilient rubber mounting production line to actually look at a The author is a consultant in audio source to a loudspeaker output for the socket contacts of the female desk in the course of manufacture systems and acoustics and a writer, as whether signal is receptacle and a robust before he could answer my enquiry connector, the particularly and has no commercial interests the draw- wired contact 2 'hot' or contact 3 mechanical design. However, they and several had to go into whatsoever. In consultancy, stand- office and look at circuit 'hot' the amp output will be fed also have the disadvantage of being ing ards are important. A great deal of straight up the line and into the desk very fiddly to assemble, with several diagrams. Some manufacturers time, money and energy is put into whatever! screws and clips which are greeted my enquiries with consider- output stage or small the preparation of standards and So the present system is unaccept- easily especially when leads are able enthusiasm, with the comment lost- those standards that do finally see able because the exposed having to be repaired or made up on of contacts that it was about time someone took publication are not arrived at lightly. carrying high power levels, the use the road without the luxury of a the matter up in the hope of airing We are fortunate in that as far as the present system in reverse is workshop bench. the other the while were of All confusion, others not low level audio interconnections are unacceptable because there would manufacturers use solid moulded even aware that a problem existed - concerned, we do have an then be no differentiation between inserts one sort or another, that their plastic of being totally convinced internationally agreed standard and input and output connections on some which unfortunately have a own configuration was the only one. of ready access to the hardware to power amps, and the old ASCE tendency to crack and fall apart Very few indeed were aware that implement it. So for goodness sake, system using the XLR /4 does not when subjected to hard usage. The there was in fact an international or let us as an industry adopt the IEC seem to have caught on for some Switchcraft QG series are particu- British standard. So even if you took 268/BS 5428 standard and end all reason. Nor do there seem to be any larly easy to assemble and wire as all the trouble to telephone your sup- this messing about. moves amongst the various standards the screws etc. are captive within the plier, it is unlikely that you could Remember, Pin Two Hot! authorities to find a remedy. housing. The Neutrik Latchlock immediately find out which way What is wanted, in the opinion of series are also of a good overall round your new processor or what- For further information purposes, see the survey is a a was wired. the author, totally new connec- design and feature collet type of ever and reviews of connectors in Studio Sound. tor designed specifically for the cable clamp which eliminates the use With unbalanced circuits, inter- November 1980. 56 STUDIO SOUND, FEBRUARY 1982

www.americanradiohistory.com I.T.A's Penny Pinching Packages for 1982 * Exciting new products * Biggest ever choice * Wider range of applications

Suggested Suggested Application Description Application Description

2 Track Radio Revox B77, Alice 828S, Signal Processing D Er R Rack, with compressor, Production Technics tltable, Nakamichi Package A parametric ED, noise gate N480Z cassette

Package B GBS reverb, Teac Graphic ELI, 2 Track Stereo Otani MX5050B, 'tam 8 x 2 Fostex DDL Mobile Mixer, Gemini Compressor Package C Rebis rack with 2 x noise gate, 4 Track Budget Teac A3440, Seck 10-4 Mixer, 2x compllimiter, MXR Graphic, Studio DBX RX9 noise reduction 1ÍJ GBS reverb

Package D Rebis rack, delay package, 4 Track Audio - Otario MX5O50BQI1, Teac 133, c, Visual Presentation Alice 1285 Mixer Pt-1g 2x noise gate, 3x ompllimiter, de- esser, para EQ, Klark- Teknik reverb 8 Track Budget Foster A -8, Fostex 350 Mixer, f I_ fl lé .é Studio Teac V9 Cassette Otani DP4050C2, Teac C3X deck, Duplication Bulk eraser 8 Track Recording Otani Mklll -8, Studiomaster it , Studio 8x4 Mixer J¡i r_° Otani DP4O5O OCF reel to cassette, Otani loader, Teac C2X, Bulk eraser 8 Track Recording Otani Mklll -8, Studiomaster tlr Studio 16x8 Mixer, Otani MX5O50B stereo tr i i

Microphone Package A 2x AKG D190E, 0222EB, D310 8 Track Video Otani Mklll -8, Omni -Q Synchronizer, Production Alice 12 -4 Mixer 5658 Package B AKG D12, D222EB, D190, 0224, 2x C451ICK1, 2 Calrec CM10O0 16 Track 1 inch Ram 1610, [tam Sigma 16 -8 -16 Mixer SÚ 8 Package C AKG 012, 0330, 2x D224E, 2xC451ICK1 a 16 Track 2 inch Otani MTR90, Syncon B Mixer Neumann U871 20 x 20 19854

24 Track Otani MTR90, Soundcraft 2400 Monitoring Spendor BC -1, Quad 405, AKG K160 Mixer. Otani MTR -10 Stereo 3t BCi headphones

16 Track Video Otani MTR90, Audio Kinetice Tannoy Little Red, HH V -200, Auratone Production 0 -Lock. Otani MTR -10 Stereo r:!A_IU!r 5C, Quad 303, 4xAKG K160

ITA, 1-7 Harewood Avenue, Marylebone Road, London NW1. Tel: 01 -724 2497.

www.americanradiohistory.com business BARRY FOX

Red Herring campaign continues levy scheme to help new talent in the performing back on overheads, and work harder to make the arts, the BPI's campaign has seemed so inept and public want to buy more of their products. This A fly on a Whitehall wall tells me that a profes- shot full of holes that it raises the hackles of is of course exactly what the rest of British sional lobbyist, working on behalf of the record anyone in the business of reporting facts. If all industry is already having to do. companies, was recently cornering MPs and the BPI's unsubstantiated claims and religiously There is a largely forgotten third, and chilling, extolling the virtues of a tax of f2 on every blank obsessive dogma were to go unchallenged, only possibility. Instead of taxing tape to subsidise the cassette. What the record company lobbyist reports would find their way into print. industry, a left wing government might seriously didn't bargain for was that the idea would get uncritical These are then re- cycled by the popular press and consider nationalising it. picked up, and revised, by the Liberal party. The -perpetuating folklore fact. Liberals are now entranced with the idea of become self Someone, somewhere, has to put some questions putting a tax of 1007o on tapes to subsidise all live on to the public record. arts events. record industry has never The next government could well be a Liberal/ Significantly the Surrounding confusion answered the critical points made and questions must be very depressing to work as SDP alliance, so this idea might well become law. It sometimes raised, for instance with a letter for publication. a producer, or engineer, at the BBC. For several Although it would enable theatres, opera houses significantly, no one else does so on their now the `Beeb' has had the technical and concert halls to put on unpopular, non- Equally years We know that the record industry has on expertise and equipment necessary to produce commercial, non -viable shows (which may or behalf. several occasions encouraged its top brass to radio programmes in surround sound using may not be a good thing, depending on your prepare a response to published criticism. But so Ambisonics UHJ coding. Some producers have point of view) it certainly isn't what the record far every response has taken so long to prepare, been anxious to exploit the new medium. But the industry had in mind when they started lobbying and read so clumsily, that the industry has wisely BBC has been worried about being seen to spend for a tax on blank tape. its would do more harm money on surround sound while cutting back Likewise there was some confusion over the decided that publication than good. Instead the industry opts for the elsewhere. As a useful compromise Radio 3 support offered by John Morton, general approach. Money is thrown at the recently started a `Quad Season' based on secretary of the Musicians Union for a tax on easier problem, with half -page adverts in the top repeats of previous productions. (It would have blank tape. Morton was reported to be urging the newspapers. I have had industry snoops been nice if they'd called it a `Surround Sound government to tax both tapes and recorders to people's for possible skeletons in the let's let that quibble pass.) protect the employment of musicians and actors, digging around Season', but cupboards of my personal life. They've The publicity material put out by Broadcasting by funding subsidy schemes. This is more complained to the publishers who employ the House for the press puffed Moby Dick as being attractive than splitting the levy between already - editors who employ me. But there's still never in `quadrophonic sound' but made no mention successful recording artists. But it's all starting to factual rebuttal of what I've written. of the coding system used and thus gave no sound very much like road tax. Originally levied any The record industry as we have known it is indication of the reception equipment needed to to pay for new roads, the proceeds of road tax now for It tax on as decode it. It could have been SQ, QS, Matrix H, very soon started to get siphoned off for other fighting survival. sees a tape the only life line, and will do virtually anything binaural or IBA 3- channel MSC. Remember that less worthwhile causes, like stock -piling for the to If, highly the put out by the BBC Publicity holocaust or paying people more for staying at secure it. as seems unlikely after the material errors made in the is for the national press home than they can get for working. of judgement current Department intended campaign, the industry were to win a tax on tape, interest magazines who are almost Sadly it seems that the BPI has learned nothing and general on technical from the lessons of the Government Green Paper the record industry would become like the horse without exception totally ignorant no mention of mono and which rejected the idea of a tax on tape, even racing industry, ie " ... hopelessly addicted matters. There was also proud though the Government justified rejection by to subsidy." If this Government, and stereo compatibility, just several references to `quad' and `quadrophonic'. I phoned concluding that "the sales lost as a direct subsequent gcivernments, refuse to levy a tax on BBC Radio 3 publicity. "I don't understand consequence of private copying cannot be tape then the record companies will be forced to the technical side," said publicity precisely quantified ". Two months later the BPI restructure. They will be forced to throw anything about without girl number one, "try the producers ". I did, but cheerfully issued a categorical but completely passengers overboard compensation, cut neither was available. Neither phoned back. So unsubstantiated statement that "at least one 3 where another girl also third of the industry's potential market will back to Radio publicity a but said her boss would phone me remain lost to home taping until some measure Woof ... woof! hadn't clue back. He did and he also didn't "understand the of protection is afforded to copyright owners ". intricacies ". In fact he seemed quite proud of his The italics are mine. The unproven dogma is ignorance and simply shunted me to the theirs. So also is the continuing loss of engineering information department. They did credibility. of course understand and were able to confirm The BPI has also been advising people on how that both Moby Dick and Milk Wood were best to write to their MPs supporting the idea of repeats, which had started life in discrete 4- a tax on blank tape. So presumably British MPs channel form and later been transcoded into will now receiving a flurry of curiously similar be UHJ. letters. Isn't that a bit like hyping the charts, by But such is life in Broadcasting House, that the getting people to write into request programmes, first the engineering information department had all asking for the same record? heard about the quad season was when they read about it in the Radio Times. Exactly the same thing happened a couple of Getting it straight years ago when the BH publicity department It may not have escaped the notice of regular press- released a binaural stereo broadcast readers that Studio Sound in general, and this without having a clue what it meant. Fleet Street column in particular, does not show too much regurgitated the announcement with advice that respect for the people running the record listeners would need special reception industry. In particular I have criticised the BPI's Around 500 people turned up for the equipment. campaign for a tax on blank tape. For the hands -on recording show held over two The Sunday Times referred to the latest record, if you'll pardon the expression, this isn't days at the Clive Hotel in North London broadcasts as "Squad versions "! Aren't the BH because I am in the pay of the tape last November. Correction: 500 people publicity persons bothered? "We simply write manufacturers, or want to see artists deprived of and a dog. When not chasing paper aero- what the producers tell us," they told me. rightful royalties and studios go out of business. planes thrown by the exhibitors, the What would happen, I wonder, if a producer It's simply and solely because although there is pooch practised Nipper impersonations. told the publicity people that his programme had without doubt a case to be made for a licence or been recorded on spaghetti? U 58 STUDIO SOUND, FEBRUARY 1982

www.americanradiohistory.com Presenting the latest in portable acousCicsAKA mixers from Audio Developments On Top amt e World

AD 045 Pico Plus 4 Channel version AKG is an Austrian manufacturing company, specializing in the field of acoustics. How many times have you wished you had a AKG has been awarded well over 1000 basic patents on trans- 4 Channel Stereo Mixer! You have ducer design. searched AKG is the leading producer of professional microphones, through the manufacturers brochures, visited headphones, studio equipment. every exhibition, and found nothing. AKG products are considered to be the most sophisticated available on the market today. Now the AD 045 Pico Plus is available in a 4 AKG products can be called upon to solve even the most difficult situations that professionals may encounter and still remain input version with all the usual facilities flexible enough to meet all creative requirements. packed into an even smaller case! It measures AKG has full service facilities in over 104 countries. AKG - you'll meet us everywhere! only 11 x 10 x 4 and weighs only 91b. This is the smallest broadcast stereo mixer around having 3 band EQ, Penny and Giles faders, P.P.M. or V.U. meter, Rechargeable Nicad Batteries and many more essential AKG Acoustics Ltd And this coupon for information about 191, The Vale, AKG products features. London W3 7QS I I HEADPHONES TF: (441) 749 2042 LI MICROPHONES Write or phone today for price and delivery to TX: (51) 28938 I 1 REVERB UNITS Antony Levesley akgmic g S-,les 1 - Director. I TIME DELAY UNITS

Hall Lane, Walsall Wood, Name WALSALL, West Midlands Street WS9 9AV. Telephone: Brownhills 5351/2/3 Town Av STD Code 05433 Postcode DEVELOPMENTS Telex: 338212 Audio.

www.americanradiohistory.com rr HE mention of 'pirate ships' I immediately conjures up the memory of the days when pop music was not so easily available to teen- r1 1u1e on radio waves agers as it is today , and Radio fhe Luxembourg had the monopo until the adsent of the radio ships, Pippa Lewis which added more than a touch of excitement and romance to pop music if you sere fortunate enough This interview is the first of a three -part series held with Andy to he able to tune in to one of them. Andy's ins olsement with a pirate Gemmell- Smith, former chief engineer of Radio 210, Reading's local ship came about in quite a bizarre commercial radio station. The series covers his early experiences in fashion, and overnight his life took a pirate radio, his move to independent local radio after the pirate completely different direction. ships were outlawed, and the setting up and launch of a new local I started off working for a small recording studio in Kent, and then radio station, Essex Radio, where he has now taken up the post of moved to R G Jones in London, chief engineer. working on the PA side. After this I set up with a partner in Kent making disco equipment. This and other work that I had been doing was a good foundation for a career in radio. One of our customers was a disc jockey who had previously worked on one of the pirate stations and was due to start work with a new pirate station. He recommended me to the Dutch and Belgian backers of the station as a possible engineer; much to my surprise one evening a strange Dutchman called Gerard appeared on the doorstep who turned out to be the managing director of the new pirate radio station - he had come to collect me to start work on installing the equipment on the ship! To begin with I thought he must be mad -this was the first I'd heard of it at all -I didn't even know that I'd been recommended to them! The Dutchman, however, thought the whole thing had been completely arranged. To begin with I refused his offer, wanting to have

www.americanradiohistory.com time to think about it, but my mind what the hell I had let myself in for! missing. I began to try and figure border with a week to get the station was very quickly made up for me It was like a camping holiday gone out how to make at least one of these on air. We put up the aerial system when he placed several hundred wrong; but things did get better -we transmitters work. The 10kW had and were able to prove the transmit- pounds in my hands, saying 'here's managed to get a power line from the most parts missing so I decided ter worked; original test transmis- your first month's wages!!'. So I the harbour which gave us electric to concentrate my effort on the sions were put out using the station agreed to go to Cookshaven in light at least for the time when we smaller transmitter; in this transmit- mixer on the floor of the wheelhouse Germany which was the port where weren't rewiring the ship and a ter it was the oscillator /driver section with a few nails around it to prevent the radio ship was being built -1 had couple of weeks later some generators which was missing and I made one it flying across the floor when the agreed to go for one month to see if I were delivered which were fitted on up using parts from the other ship rolled. Music that our early liked it and to help them out. That deck at the bow of the ship. No transmitter and from the ship's tele- listeners heard originated from a very evening I phoned my partner studio equipment was on board but vision set, much to the dismay of the cassette machine which belonged to and told him I wanted to take a there were a couple of old transmit- rest of the crew! The end product one of the disc jockeys and a few month's holiday. We were short of ters, both of which had been bought was tested into a dummy load pre- recorded cassettes, mostly James orders at the time and he agreed that secondhand from defunct pirate consisting of fire bars in Cookshaven Last; and an AKG D202 microphone this was no problem and so with a radio stations. The first transmitter itself and with just the generators handheld by the announcer saying: complaining girlfriend I left for was an RCA BTA 10J 10kW and the transmitter working and still `This is a test transmission being Cookshaven. I decided to stay. transmitter which was bought very few blankets we sailed for the made from the motor vessel So began Andy's life with Radio secondhand from radio 270, the coast of Belgium -we had to leave in Jeannine anchored in international Atlantis. The year was 1973 and he pirate radio station that broadcast to a hurry because we had been tipped waters 12 miles from the coast of was 'a raw 21- year -old'. Yorkshire in the '60s, and the second off that the German authorities had Belgium on the medium wave band'. transmitter was an RCA BTA 1R1 learnt of our existence and were 'When I first arrived at the radio The original test transmissions were lkW transmitter which came from a raid the ship! ship 1 was a bit surprised, having about to The penalty carried out with a power of 'hkW always thought that radio ships Dutch pirate radio and TV station that we paid for this was having to which gave us a range of about 30 or would have been fairly luxurious; also from the '60s, TV and Radio put the aerial up at sea, sailing 40 miles inland although reception this was far from the case -the ship Nordzee. without the ship being painted and reports were received from Essex These was a rusty old Icelandic trawler, came without manuals and without having the studio built. and Kent; the power would have with many parts 150ft long and 30ft wide, about 500 of both transmitters There were very few crew members been greater brit we didn't have tons displacement. There were no -just myself, two disc - jockeys and many of the insulators that we had engines in the engine room and no one Dutchman on board. We were required for the aerial system. wheel in the wheelhouse. These had towed to an anchorage about 12 However, the test transmissions did been sold off for scrap; the ship had miles from the border of Belgium, the trick and we closed down for a been bought for about £8,000 and off Ostend, and the day after we few days whilst we completed the had a buckled propeller shaft which arrived the supply boat arrived with building of our studio. was the reason the ship had been the studio equipment that I had scrapped -it was renamed The ordered, food, fuel and water, and Jeannine, after the boss's wife, and the wood that I needed to build the the first night I joined the boat in studio -except that instead of being Cookshaven one of the Dutch crew plywood it was 4 x lin floorboard - managed to set fire to the mess room ing planks! Also a message came with the diesel boiler which was our with the equipment from the owner of the station saying that he wanted only form of heating! The only form When complete, the studio consis- of lighting on the boat at that stage to hear test broadcasts from the ted of 2 Revox A 77s, 2 Micro -Seiki was by we station within the week in order to paraffin lamp, which belt -drive turntables (which had were convince potential advertisers that running on diesel with smoke been selected for their fast start going everywhere; there were the project was serious. So we had few time) with Micro -Seiki arms and mattresses arrived off the Dutch /Belgian on the boat, and even Shure M3D cartridges and a Rodec fewer blankets, and I wondered mixer made in Holland which was k five stereo channels and a microphone channel, secondhand RCA cartridge machines and two AKG D202 microphones; one for the presenter and one mounted in the next room, which was later to become studio 2, but originally was our news reading booth. We had a switch which transferred the microphone channel that the disc jockey used over to the other studio so the two microphones shared the same microphone fader which made a bit of a nifty operation during the news jingle. Test transmissions were originally put out live from the ship, this time in a slightly more organised fashion and at a much higher power, as more of the transmission equipment and aerial system was working properly. The station finally settled on a format of 12 hours Flemish rogramming a day from six in the morning until six in the evening and 12 hours of English programming From six in the evening to six in the morning; the total staff on board the ship numbered around six normally nd were generally speaking English, 62 v' 61

www.americanradiohistory.com light aircraft to pinpoint our exact morning man whose shift started at in stereo. The whole of the studios radio waves position. A tug was sent out which 3 am would be terrible to wake up if were stereo as we had later intended towed us off the sandbank back to you were unlucky enough to have to broadcast stereo /FM from the while the staff of our offices and our original position and a temporary preceded him, and you would end up ship, at least to the immediate coast- land -based studios in Oostberg in anchor of thick steel wire was put trying to do a programme whilst line. Holland were mostly Dutch and down until a full new anchor system cooking his breakfast, tying the Leisure time was spent playing Belgian. The radio station was a could be fitted. We were broadcasting frying pan down to the gas stove cards, answering listeners' letters, limited company in Holland, more or less as soon as the tug with wire to prevent the frying pan watching television, making love, Atlantica BV, and ran much on the started to tow us away as valuable going flying, and making him at chatting on a CB radio to other CB lines of any other commercial radio commercial spots would otherwise least half a dozen cups of tea before enthusiasts in Holland and discover- station, surviving on advertising as have been missed. he would go on air at 3.15 after you ing new ways of cooking spinach! its main source of income, although had segued in the first four or five I look back on it as one of the As I found it almost impossible to we were able to pull in a fair amount records! most exciting times of my life. I get spare parts, I became an expert of money by plugging records both You had to be very careful where worked with some of the nicest at improvisation, so when an for British and European record you left things on the ship: I went people I have ever worked with, and insulator which carried the feeder to companies and for sponsored through three Avo meters in my time am still in touch with most of them, the aerial system shattered due to the programming. there; our first television fell on to Many of the presenters involved in RF arcing over its surface, after the messroom floor and into many the station went on after its closure scratching my head for a few pieces and one of the crew members to get jobs in ILR and elsewhere. minutes I decided that the wash - around the galley by the One of our Dutch disc jockeys got a hand basin which was made of got chased deep- freeze which had become loose job with Radio Luxembourg's Dutch porcelain (and hence a good insula- from its fixings in a storm! Cooking service; our programme controller tor) would make a good substitute was very difficult as the eggs you Steve England became commercial until the correct insulator could be were frying had a tendency to jump production manager at Piccadilly obtained. The studio's signal process- out of the pan, and if you made an Radio, Manchester, and now runs ing was by means of a home -made Life on board was good fun with attempt to hold the frying pan in a his own studio, Alfa-Sound Tapetrix limiter /compressor made by me everybody doing everything; the horizontal position above the flame, in Manchester, which has made the which I designed and built on board, more tasks you could handle the the chances were that you would go jingle packages for several ILR consisting of a limiter with a dual better you got on. It was no good for flying! On the whole it appealed to stations; another of our disc release constant which then fed a a disc jockey to try to be a disc my sense of adventure. My girlfriend jockeys, Dave Rogers, became Keith small equaliser which was used to jockey only; he would have to learn also joined me on ship got her a Rogers and now works for Radio top up to add a little top to the -I something about diesel generators job as cook and we got married Orwell in Ipswich; another DJ, Dave signal, and a hard clipper which and bilge pumps and painting the during that time; also the programme Owen, got a job first of all with would clip its extra treble content if decks or the side of the ship, and director had his wife on board and Piccadilly Radio in Manchester and the programme material had a very most people spent a good deal of together the two girls would look later with Beacon Radio in Wolver- high treble, in order to prevent over - effort making their cabins and the the domestic side of things and hampton; and I got a job with modulation of the transmitter. The after ship pleasant to live in. I guess a lot remind us when we hadn't had a Beacon Radio in Wolverhampton as signal was always reasonably tightly - of them learnt a lot about transmit- shave for three days! an engineer, later moving to chief compressed and we would ters and studio equipment, particu- Getting off the ship was a very engineer of Radio 210 in Reading. I deliberately drive the compressor larly as when I went off the ship it strange experience as you would am not the only chief engineer of an harder at night to try and obtain as was up to them to keep the station have to leap between the radio ship ILR station with a 'watery wireless' much effective loudness as possible, going, as I was the one and only and the tender, which had a bad start; John Lumsden of Radio as we considered this to be less of a engineer. habit of coming out during storms: Clyde, Martin Newton at CBC, and sin than the interference which we Our anchorage proved to be not this could sometimes be a bit Russ Tollerfield at Radio Victory all were trying to overcome at night. an ideal one in many ways, as we dangerous. share similar pasts. The limiter was essential to even out caught the winds both from the Although I had no desires to make some of the bad recording that came North Sea and the Channel and we a career as a disc jockey, my present- out of the Dutch studios of suffered with many storms and -some ing experience on the boat became the quality of the tapes was less than rough seas which my stomach useful at Beacon Radio where I used good, the levels, with eventually got used to but the ship's particularly to double as a relief disc jockey to record driving the tape into anchoring system didn't! The ship's one cover for holiday periods and presen- the next record anchor was of the same type used saturation and ted a regular weekend programme on a level some 20dB lower! on a cross -channel ferry, but one recorded on the station. stormy evening one of the disc The second studio built on the The station lasted until the end of jockeys announced that a buoy had ship also had Revoxes, Rodec mixer 1974, by which time facilities on drifted past so we all went out on and Micro -Seiki turntables, and we Just occasionally the sea was so board had become very much better, deck too -then we saw another buoy had improved our news gathering calm that it was like a mirror and a but at the end of 1974 the Dutch -we began to wonder whether we service. Twelve hours English couple of times we took out our Government followed the example had broken anchor; we had no radar programming a night was broadcast rubber dinghy which we had tied to a of the English and Belgian on board and we decided that we which included a news service, which couple of hundred yards of rope, Governments and passed a law would just carry on broadcasting in was stolen from BBC Radio 2 on and sunbathed in it. We then decided forbidding advertisers in Holland to the true tradition of 'the show must long wave and from various other that we would try and do a complete advertise with us and for Dutch go on!'. So with five very frightened radio stations. We would record programme with the disc jockey in citizens to supply us with food, fuel people on board at that time, we Radio 2's news broadcast every hour the rubber dinghy and we made up a or water. Together with three out of broadcast through the night with the on the hour and study it to see if very long microphone cable with the four pirate radio stations broad- lights on shore appearing to come there were any new stories, add these waterproofed joints (at least as casting off the coast at that time, closer and closer. When dawn broke to our news file along with re- script- waterproof as we could make them), with tears in our eyes we closed we were on a sandbank about a mile ing stories that we were carrying and we had a disc jockey and a down, the day before the law came and a half offshore and about 20 forward to make them sound fresh couple of others in a rubber boat 200 into force. We closed within hours miles to the north of our normal in time for our news broadcast on yards from the ship while somebody of Radio North Sea and Radio anchorage, and well inside the Dutch the half-hour! There were no else technicallÿ operated the equip- Veronica, and the only station to 3 -mile limit -we were still broadcast- specific news staff on board but the ment in the studio -this was the carry on was Radio Caroline which ing. We decided to close down, general rule was that whoever had nearest we ever got to doing an was towed -by the same tug that telling the listeners it was for techni- come off air last was on news duty outside broadcast! had towed us back to our anchorage cal reasons as we didn't want to alert during the next guy's show, probably All the Flemish programming was some months earlier -over to its the authorities as to our real position. also cooking the dinner for him too! taped in our studios in Oostberg and new anchorage off the Thames We let our office know as soon as we I also did programmes on the station came out to the ship in big plastic Estuary. could raise them in the morning, and and read news, which was good fun, dustbins full of Tin double play tape the owner of the station flew out in a and I remember that our early recorded at 7 1/2in /s, funnily enough To be continued 62 STUDIO SOUND, FEBRUARY 1982

www.americanradiohistory.com Because of the modular plug -in design, the 1500A is designed to grow with THE INTELLIGENT you. The first plug -in option will be available soon: a spectral noise and flutter card. Other current accessories in- TEST SET clude a hard -copy printer, flight case, rack mounting ears, and our own test THAT CLEANS UP record for phono cartridge analysis. Who Can Use It? YOUR ACT. Broadcaster. Recording studio. Film sound studio. Audio manufacturer. The Sound Technology 1500A Audio dealer. Service technician. Re- searcher. Virtually anyone whose job It's the first microprocessor con- Evaluation of audio quality for requires accurate evaluation of audio trolled audio measurement test system. VTR's equipment performance. Wherever you It can do in minutes what used to take Acoustical room analysis including are in the audio spectrum, it can make hours with more conventional and ordi- microphone and loudspeaker life a whole lot easier. nary test set -ups. And, it can show you measurements Clean up your act with the 1500A. It's things you've never seen before. Quality control for high speed tape intelligent. And so is a phone call to Designed around the most advanced duplication systems Sound Technology. We'll be pleased to microprocessor hardware, the 1500A Semi- automated production send full information on the 1500A will show you the whole story on an inte- testing and our other industry standard test gral CRT with adjustable cursor. Push a Research and development for the equipment. "Copy" button, and it delivers a hard - audio tape manufacturer S SOUND copy printout from the optional VP -150 Quality assurance for the audio TECHNOLOGY Video iPRECISION AUDIO MARKETING Printer. distribution network Exclusive asynchronous inputs and Bimini House, Christchurch Road, What Will It Do? outputs for remote location testing Virginia Water, Wentworth 4416 (satellite, transmitter, studios, etc.) Please send me more information on how the Conceived to be the ultimate preci- Sound Technology 1500A System can help me i sion test instrument for tape recorder clean up my act. analysis, 1500A the evolved into a com- Here's the kind of data you can get: NAME prehensive audio test system for many Frequency Response applications. Here's just a small sample Azimuth at 4 discrete frequencies COMPANY of the varied jobs it will do: 2nd and 3rd Harmonic Distortion ADDRESS Complete tape recorder Vs. Level COUNTY mechanical and electronic Wow & Flutter; noise; weighted or performance checks flat POST CODE PHONE S SOUND Thorough phono cartridge analysis Channel Separation 20Hz - 20k TECHNOLOGY One -third octave spectral analysis Delta Speed & Drift i ,il Sound Technology 198

www.americanradiohistory.com reviews Sound Technology model 1500A

MANUFACTURER'S SPECIFICATION approximately 15s, 40kHz to 500Hz. THE Sound Technology Type 1500A is a Input/output Output level offsets: + 10, 0, 10, 20dB ±0.5dB. multifunction test unit specifically designed level at 123 discrete Input impedance: 100k52 ±1 % shunted by <250pF. Display: trace shows of tape recorders. It may how- frequencies; Digital frequency readout; level read- for the alignment Maximum input level: 10V RMS. other Output impedance: 6000 ± 1%. out references to input or display. ever be used for the test and alignment of Maximum output (open circuit): 6.3V RMS on Channel separation audio frequency equipment subject to certain distortion, frequency response, channel Frequency range: continuous sweep from 20kHz to limitations which will become apparent later. /drift, separation; 2.0V RMS on AC volts, speed 20Hz with v,- octave resolution. The unit which is based on a microprocessor flutter. Residual noise: <100pV. measurement and control, contains a Output level control: OdB, 20dB, 40dB, 60dB Amplitude accuracy: ±1dB. system of ±0.5dß stepped attenuator; 20dB vernier. Output level offsets: + 10, 0, 10, 20dB ±0.5dó. sinewave oscillator which can be swept from Input /output measurements: left only, right only, or Display: trace shows separation at 3 steps /octave. 40kHz to 20Hz either manually or automatically. left right. and Digital frequency readout: level readout references In the latter case the LF limit may be preset to AC volts to input or display. increase the sweep speed. Channel selection: left only, right only, or left and Speed /drift right measured alternately. Measurement time /range: 10s to 610s ±4%. Oscillator output voltage is nominally limited Response /accuracy: true RMS, 20Hz to4okHz ±5% Output frequency: 3.0kHz (NAB, JIS) or 3.15kHz to 2V RMS for some tests and 6.3V RMS for of reading with crest factor no greater than 6. (DIN. ANSI). ±0.005 %. 10dB others, this 10dB difference being introduced Autoranging: 1mV to 10V RMS full scale; Speed error accuracy: instantaneous ±0.5%; 10s steps. average ±0.005 %. automatically for, for instance, distortion Residual noise: <300NV. Display: trace shows lOs averaged speed error measurements. Display: vertical bargraph; active channel indicated versus time; digital readouts of both instantaneous Readout from the instrument is entirely by a by marker; digital readout of AC V 3 digits, dBm and 10s averaged speed error. 0.1dB steps. green phosphor CRT display at the left of the Flutter graphic or Azimuth Output frequency: as `Speed /drift'. instrument. This display is in either 15.8kHz. Measurement frequencies: 2.8, 5.7, 11.8, Autoranging: 0.03 to 10% full scale. bargraph form, in both cases with annotations time: 0.1s through noted frequencies. Cycle Accuracy /residual noise: ±5% of reading/ of the test being done, scale factors, Measurement range: ±180° of electrical phase. giving details to ±0.005%. voltages in volts and dB, frequency, etc. Accuracy: ±5° electrical phase (equivalent Detection: weighting and display dynamics per +min of arc in cassette format). NAB. JIS or DIN, ANSI standards. Twin (left and right) separately buffered out- Display: dynamic, shows instantaneous phase Display: vertical bargraph; digital readout shows puts and twin inputs are selected by left, right, or L R channels, plus digital error between and sigma signal (smoothed, 95% of peak). with the actual output readout of error at measured frequencies. left and right pushbuttons Noise terminal voltages being monitorable on the Distortion 85dB; weighted 90dB. versus Residual noise: flat Measurement /display: 2nd or 3rd harmonic Flat response: 3dB points at 20Hz and 20kHz. display as a bargraph plus voltage and dBm for input level. Detection, weighting and display dynamics: per either or both channels. Similarly the input Fundamental frequency: 400Hz (other frequencies NAB, ANSI or CCIR /ARM standards. available as options). voltage at either or both inputs may be monitored, Output: floating, 6000 termination. with Accuracy: ±5% of reading. Accuracy: ±0.5dB. in both cases the voltmeter being autoranging Residual distortion: output <0.03 %, input Display: autoranged vertical bargraph with digital a bargraph display of 0 -10 or 0 -3 (10dB steps) <0.03%. readout, referred to input reference level. down to lmV full scale for the outputs or 100NV Input /output level: input from recorder - display shows distortion versus input level in 1dB steps: General full scale for the inputs. output to recorder -+ 10 to 20dB in 0.5dB steps Rear panel outputs: composite video signal, 1Vp -p The oscillator output level is controlled by ±6dB. 750, negative sync; demodulated flutter referred to preset output. pushbuttons for separate 20dB and 40dB atten- Sweep time: <40s, + 10 to 20dB; can be termin- signal, autoranged, <15Vp -p, 1kO. ated earlier with STOP button. Power: 100, 120. 220, 240V, 48 to 66Hz, 120W. uators plus a variable potentiometer permitting Display: trace shows plot of distortion versus input Dimensions: 17.0 x 7.0 x 16.4in/430 x 180 x 420mm levels to be set down to 600NV. level: digital readout of distortion in percent and dB. (whd). An additional feature allows the unit to store a Frequency response Weight: 361b/16.4kg. level (for instance a given fluxivity on Frequency range: continuous sweep from 40kHz to Environmental (90% RH): +50° to +104° F / +10° reference 20Hz: low frequency sweep limit or single to +40 °C. tape) and to use this reference level for relative dB frequency output obtainable within this range. Accessories provided: stereo input and output measurements which are very useful for distortion plugs, power cord, user's Frequency accuracy /resolution: ±5% of reading. cables with male phono measurement, noise, frequency response, etc. ±3 °%. manual. Amplitude accuracy/flatness: ±0.5dB /±0.5dB. Price: £4,085. Turning to frequency response measurement, ±0.2dB: 100Hz to 20kHz. Manufacturer: Sound Technology, 1400 Dell there are three basic modes of operation, manual, Minimum input SIN ratio: 20dB. Avenue, Campbell, Cal 95008, USA. Maximum input signal slope: 60dB /octave. UK: Precision Audio Marketing, Bimini House, Sweep time: approximately 40s, 40kHz to 20Hz; Christchurch Road, Virginia Water, Surrey. 66 64 STUDIO SOUND, FEBRUARY 1982

www.americanradiohistory.com , i w A 1 .4 :, ., P i ,t j ii I ,, 4

, . 11

.4 - r, most acclaimed t , . 1,.. , s n ni v rsat I g ; I .4 I- 1 - J'' . i,, ' 4 , d i II , ''i ' ) 4 7,-. If yo-u Oa rikii 0419 if g r -" I . P ''', - ' Ill i generation revert) and oper in gi r. t - - 411) . , ilk introduced that even fun* en ari' it . , 0 oudio ggrformance. And, you C,an Update

your sAtem fdlt pocklorrione.,41 simPlyi ' plugging,,in these new Version ram

4 i .' . 4.,-,\ -) j you vere this .. superb audio-processing instrurp -the tnost successful ever intrdd ced into pro asdio-now's the time. 'The " 4' Model 224 is the numbertone cheice of ,, the wörid's leading studios, broadcasters rr ¡and mirsical artists, Reason: audio 4 rr 0 iip , 04 i perforrhance unmatched by anything else ' '' ''' 4 f i a' 0 0 1 a , IVOUnd true stereo processing i I. ok ...... 1 5, e, . ,,i . a complettly natutal soun4I ... multiple I - :" L ----, 0 ' "evIllorb prowam.s ..*. fullifingertio cortrqlof all reverberdtion I el' :

parameters lipat 2 1 .4, ... anAetrefitillesion , Aircc.4.1t.tstievewirlabiiitis- .! , t ' it *. a -_____2 -, '; ; --) as they become available. Like Versiont Ryan. :1 a i , ,'

, i Mk , ., a ' a 1 With the new Version-3 you get even smoother decay ...-+ j .¡ 4111 0 - 0 ..! i

enhanced ease _ , 1 of operation ` ..., plus provision for up to 36 I pre-sets you can store . and recall at will plus a new non-vo)atile ., memory option that permanently saves your reverb pro gram set, h ups even hough power is removed. riV

-"1- Put ale Lexieon Model '224 tp work for you. Nothing can » : .t temch it for versatlity orquality fir sound! And field-upditeability r`i ' ' 'takes it/the mo cost-effective4ohoice them 'C')` r, V''' -1-, Write for literature &i why 'the bes is better. fog uou. . f a I a P.

Vt OE P111 \ Nt 4111.111111111111.1111

Lexicon, Incorporated Waltham, MA USA TELEX 923468 In U.K.. Scenic Sounds Equipment, 97-99 Dean Street, London WIV 5RA tel 01-734-2812

www.americanradiohistory.com reviews single sweep or continuous sweep. Entering the bars the size of which corresponds to the azimuth normally or the speed /drift ranges. labelled `split' is used manual mode places a conventional frequency error with the full scale display being ± 180°. A further pushbutton are dis- response graticule on the display from 20Hz to Stopping the unit allows the cursor to be used on when both the left and right channels left right 40kHz and with 10dB per vertical division. This the display to give the precise frequency and phase played. In these circumstances the and may coincide or overlap the may be expanded to 2dB per division. error in integral degrees at each frequency. channel displays - is used to separate the left and Depending upon the selection of the left, right, Output level in the azimuth mode is automatically 'split' pushbutton by one vertical screen division so or both channels, relative input level data is set to 10dB below the operator set reference level. right displays they can be separately examined. displayed in dB together with the operating The final measurement using the operator set that Finally two buttons in the display section allow frequency at a display position identified by a reference level is that of noise, the display being an the selection of the mid screen vertical reference in vertical cursor line which may be moved either annotated bargraph for either or both channels the decibel display modes. This allows the centre way by a 3- position centre- biased switch below the giving the relative noise level in increments of the display to correspond either to the operator display. The cursor also serves to set the LF limit O.IdB. Noise may be measured to the NAB or of or to any point in the display. The in the sweep modes by setting the cursor to the ANSI A- weighted or unweighted standards or to preset reference the over any desired frequency and pressing the `low frequency the Dolby originated CCIR /ARM method using latter is achieved by placing cursor and pressing the vertical limit set' button. Where a sweep mode is desired the CCIR Recommendation 468 weighting with point in the display may then either single sweep or repeat are pressed. an Average Reading Meter, the unity gain of the reference `display' button. The cursor the display Depending upon the left, right or both settings the weighting network being at 2kHz. Further be placed over any other part of with a unit then either sweeps one channel or measurements possible include tape speed and whereupon the relative level is displayed alternatively both channels proceeding from wow and flutter. resolution of 0.IdB. 40kHz downwards to the lower limit. Entering the speed /drift mode produces a Going now to the buff coloured level and mode The repeat mode continues alternate sweeps for graticule on the display with the vertical axis select area this has the twin inputs and outputs in left and right if both are requested, whilst the representing ±0.6% error and the horizontal axis the form of BNC connectors, the instrument leads and single sweep mode terminates after the alternate 0 to 10min in time. The unit then proceeds to draw being supplied with four BNC to BNC BNC to phono plug adaptors. sweeps or a single sweep. Once in this condition a graph of speed error averaged over lOs versus most excellent this section are the oscillator the cursor may be used to measure level at any time whilst also displaying the instantaneous To the left of with a variable level pot and locking 20dB given frequency for both channels. Furthermore speed error with a resolution of 0.01% and the lOs outputs The left and right the complete display may be shifted up or down by averaged speed error with a resolution of 0.001 %. and 40dB attenuator buttons. are automatically switched on /off increments of one vertical division, being either At the end of the scan or at any time when the outputs the measurement being performed 2dB or 10dB. These features allow the com- display is stopped the cursor may be used to according to when measuring parision of levels in 0.1dB increments at any display the lOs averaged speed at any lOs interval for instance no output is present is present when frequency over a wide range. with a resolution of 0.001 %. In addition the noise and only one output So far as frequency response measurements and display resolution may be changed between measuring channel separation. channel separation measurements are concerned, ±0.6% and ±0.06% and furthermore the speed To the centre of this section are four interlocked the mode the a final feature is four interlocked pushbuttons drift between any display point and any reference pushbuttons for selecting of display. allowing the level of the sweep to be set to the point in the display can be directly measured. This allows monitoring of the terminal voltage at reference level or + 10dB, 10dB or 20dB. The reference frequency for the drift measure- both outputs, manual sweep, single sweep or The measurement of channel separation has ment and wow and flutter measurement can be repetitive sweep. Below these buttons three similar features to that of frequency response either 3k Hz or 3.15kHz corresponding to the IEC momentary pushbuttons allow the instrument to except that one must measure one channel at a and the NAB /JIS reference frequencies for wow be stopped, the outputs to be started and the time, however the results for both channels may and flutter measurement. inputs to be started. Finally to the right of the be individually or simultaneously displayed with Wow and flutter may be measured weighted or section there are the twin BNC inputs with the the same measurement facilities as those for unweighted to the IEC quasi -peak, JIS or NAB miniature protective fuses and a momentary `data frequency response. Channel separation measure- standards with the display being a vertical storage' pushbutton. This switch is used to reverse ment is not however a selective measurement and bargraph which autoranges down to 0.0307o full the data storage channels so that two sets of data noise can cause misleading results. scale. In addition to the bargraph the display can be stored from a single channel so that two A feature of both frequency response and includes the 2 sigma wow and flutter with a adjustments of the same channel can be readily channel separation measurements is that it can be maximum resolution of 0.001 %. compared without any wiring changes. used with external frequency sources such as So far this is but a brief description of the Referring now to the cream coloured section of with calibration tapes or discs, the unit tracking the facilities available in this comprehensive unit and the front panel this is logically laid out display frequency according to the external whilst the layout of the controls is very uncluttered effectively three horizontal rows of pushbuttons frequency. and well labelled it does take some time to fully the centre row of which selects the test being to left this row Unlike other measurements second or third appreciate all the possibilities. performed. Proceeding from right third harmonic distortion measurements are selective has, AC voltage, azimuth, second and harmonic distortion, frequency response, channel using a fixed frequency which is normally 400Hz Front panel is into separation, speed /drift, flutter, noise and self with options of other frequencies such as the 1 kHz Turning to the front panel, this divided of the review sample. three basic areas, the display, a cream coloured check. The latter button initiates an internal self Either second harmonic or third harmonic is test select area and a buff coloured level and mode checking procedure which lasts just over a minute plotted on the display versus input level with the select area. and results in a display 'I AM OK YOU ARE OK' generator starting at 10dB above the operator set Considering first the display section, this is if all is well. reference level and proceeding downwards to defined by an apparently black plastic section The top row of buttons select left, right, or left 20dB in 0.5dB steps. At the termination of the with the power on /off button, a green power and right; the noise and wow and flutter standard sweep of either or both channels as desired the indicator, the cursor movement switch, the LF of measurement, weighted or flat; and provide a display reverts to the cursor mode allowing any limit set button and a 'copy' button below the reset for the electronics. point in the display to be measured to within display. In fact the copy button is for use with a Finally at the bottom one button sets the 0.IdB or 0.01% resolution, both being displayed hard copy video printer and was not operational in operator's reference level, four buttons set the for both channels as desired. Furthermore the the review sample. level for frequency response and channel display resolution can be 10dB or 2dB per division To the right of the display are the six separation measurements to ±10dB, OdB, with the vertical shifting of the display still pushbutton display controls. Two controls, `up' 10dB or 20dB related to the operator's operative. and `down' normally shift graphical displays up reference level and last of all a pot sets the repro- Neither the distortion mode nor the azimuth or down in the vertical axis, but, in the manual duction level at a small inbuilt monitoring loud- measurement mode can be used without special frequency response mode the controls act as speaker -a very useful feature. external sources, thé azimuth mode outputting incremental frequency controls. The next push- At the rear of the instrument two BNC con- syncs feed serial 2.8, 5.7, 11.8 and 15.8kHz tonebursts. The button is the vertical expansion control which nectors provide a video output with to replayed tones produce a display of four vertical selects 10dBm or 2dB per vertical division 68 66 STUDIO SOUND, FEBRUARY 1982

www.americanradiohistory.com Eardley Electronics Ltd TEL 01.221 0606 TLX 299574 A complete audio measuring system from Wayne Kerr AMS1 AMS1 is the equivalent of 10 separate instruments performing 15 types of measurements at accuracies equal to or better than the equivalent stand alone instrument.

Includes: * Low Distortion Oscillator * True rms Voltmeter * Multi- frequency Distortion Meter * Wow and Flutter Meter * Multi- frequency Crosstalk Meter * Rumble Meter * Phase Meter * Noisemeter (to latest standards) * Peak Programme Meter * Digital Frequency Counter * Power * Balanced Input /Output Option Whether you're checking your hi -fi or maintaining a studio complex, AMS1 is the elegant, low cost solution to audio measurement problems. Write or ring for details: WKR Limited, Wayne Kerr Division, Durban Road, Bognor Regis, W. Sussex P022 9RL Telephone: 0243 825811 Telex: 86120

www.americanradiohistory.com r¢Vi¢wl the grounds of the terminals having a 1052 resistor an external TV monitor at 60Hz frame rate (which the front panel controls. Either side of the power to the instrument's chassis which has a separate could cause troubles) and also provide a scaled supply, four edge connectors are provided, (only The oscillator output impedances replica of the audio input for an oscilloscope. three of each were used in the review sample) large earth terminal. PCBs plugging into these. were satisfactorily low at 49.80, remaining Construction The overall standard of construction was found constant with output level setting. 40dB Externally the unit is solidly made with a hinged to be excellent with all integrated circuits being Attenuation offered by the 20dB and the stand at the front for tilting the instrument. Not socketed and all parts readily removable for main- attenuators was found to be very accurate being intended as a portable unit no protection is tenance. However, no servicing information was 2OdB attenuator measuring 20.02dB and the 40dB provided for the front panel controls. provided (probably for good reason, as this is a attenuator 40.038dB. Using the attenuators and Within the case the video unit is in a screened very complex instrument) and it was felt that the the full range variable control the output could be compartment with the power transformer to the operator's manual could be bettered. reasonably controlled down to 10pV or below. rear. When using only one output the isolation of the Centrally mounted is the power supply unit Oscillator performance unwanted output was excellent at greater than which plugs into a mother board at the front of the The two oscillator outputs were found to be 100dB. Band limited 22Hz to 22kHz RMS noise in with unit behind a further printed circuit supporting all separately buffered to eliminate interaction the outputs was 5.5µV in the noise measurement mode. MMMMEM the maximum FIG.1 MOM M :::: In normal modes of operation 1MM::'.'.I MIC: :: MM.u SOUND TECHNOLOGY MMNE MIME Man MC:::::1a oscillator output was 2.056V RMS with the level MODEL 15O0A MIMI= =NM ::'t MM.M.. difference between the outputs being less than SPECTRUM MIMI=IM __:..I 11= DISTORTION MEN :::°I In the distortion FOR 1kHz ú:::iiü:::'..== ===::::: 0.002dB at any level setting. =pp::::. mode a further 10.5dB of output was available, =E: MMIEM .;: M.::: but only at 1kHz. IC::R: ::::::MMM.:I=.... MMCMNIC:-::: __:::::imiMmMEM ---:: p=:s::: When in the distortion measurement mode the =MEMOME.:::M ... was stable at EMM. =MEMO .M...MMM ... frequency of the oscillator output ICMMIM:::::' I - ... 1.0024kHz with the second and third harmonic ..M. :::'.:C CO::::: distortion being low at - 80dB (0.01%) and 0.1V C:::7 the MMEEMEEN::::: ..... l _C::::::C - 88dB (0.004 %) respectively. However, in IMMIMMIMEEE ...._ output is ======MM 'i:==:::::CMINIM MI EMI swept modes it appears that the sinewave IMEIMEMEM MIM..MM IMM M NM IMMEMEM IMMN. M ... synthesised and the distortion tends to be high. A 0.037 '== G'.1 C::::::M . is shown for 1kHz in ::::ME typical distortion spectrum C :'.'.: :::::: MO eeeEMI= El .. 1 is seen that the output is rich in 1::::: C::C: Fig where it to be IMINEMMEM M. 1M . the ME ...=:.MI Ç harmonics at levels up to about 0.3 %. For

I this is not of 1I : intended purposes of the instrument FREQUENCY 01 Hz consequence but the harmonic content could be troublesome when auditioning transducers such mmIMM as loudspeakers. FIG.2 MENIMMEM CC::::ppME :::::0 The flatness of the oscillator output was good SOUND TECHNOLOGY C:::::CC C::' ME than +0, -0.1dB from 100Hz to MODEL 15O0A C:::::COC:::: p being better ::::: ;::: falling to -0.12dB at ACCURACY OF C::::C1:::::1MM.MI miMMEMIM ME 40kHz reference 1kHz and +37. FREQUENCY MIMMMEEC::''.Cç ::C:::'.CC ME 50Hz and 20Hz. INDICATION M... M EM.. MM-.-- .MMM... M. .:::: CC Accuracy of the frequency indication, which ::::: 0M::::: C::C::_CC::::: MM.. MM. M applied to all measurements, was within the iMEmEmEESM C OM specified ±5% but varied widely with the MM.. ME :_:CM..I:::::11:C:::::CMM.. ME frequency as shown in Fig 2 which plots the error p Cz::C:C:::::C_C__C_:.. of the actual frequency related to the indicated : NM MI frequency. ::::IICC:::'.:1MENIM.C MEI.ppp::::CM:::::MMEMMEEMI .E MIMIMIIME 0__C il=:::::CCO::::ppMEMEMM M. ::CCC Voltage measurement C The voltage measurement system applies to both -37. ::::1C;=11C the oscillator outputs and to the inputs. At 1kHz M:::::lt;=M:::::: CC:::::C::::C=I:::;ICI: the accuracy over the entire range from 2V to 1 mV _:::::M:. :::::C:::::CC:; was within +0, -0.5 %. The tolerance on ME :.::Ct=:::::0 1k 2k 5k 10k 20k !Mk was that the flatness was within 20 50 100: 200 500 frequency such FREQUENCY IM Hz ±0.1dB from 16Hz to 54kHz on the lmV FSD range with the - IdB points being at 8Hz and 63kHz. MIME FIG.3 IIMM.T. MEN M MIC::'.'.7 :: C::::: .C:.... In practice the bandwidth varied little with the SOUND ::: level the unit was found to have a true ::CMM.INMMEN= M.. input and TECHNOLOGY ':=:::::CMMI... EMI ::: MIEMMIMM. :::MM.. RMS rectifier. MODEL :=C:::::11= :mMEMMIEZI ::m :MMM. =M::::: 15O0A EMIIMI AMouiNoMiMminMiNM = C:=:::.'. C =:::: FREQUENCY VIM! MI MMIMIMMIMN M ==::::::ppC::::: Frequency response MIIIMMIMMME =MI CO::: MIMIM. RESPONSE - IIMMINSIMMNI NMI : frequency response was UNWEIGHTED The overall input /output C:'.C'. =MEN measured as being within ±0.1dB from 330Hz to MMIMMEM ::::::ii : MIMMENEE -M: frequencies CI°:::I pÇ::::I 40kHz reference IkHz with the low ::: MO CM::'.:: falling off to - 0.3dB at 20Hz. ME C::'.CCC Çiiii IMMIMMEIMM In all frequency sweep modes the instrument CC::::: M :::: 1M ENI MIME ;:::::I=.=.. starts at 4OkHz taking 14s to sweep to 1kHz, 24s to MEE==. ME pC :C:::.:C::::I 100Hz and 43s to 20Hz. It follows that consider- :::::CM C:::::C:::::IMIMI= ME NM ME.... ME MEE : MO MENEM ME OM MIEI M MN able time can be saved if the low frequency limit MI NEM M 0EMMEIM M.. CMM p: facility is used. MMIMMEM sweeps the instrument ....:::.:0::::::::::CC...... MN Using external frequency CC::'..:...MM...OC:::.: could follow remarkably fast sweeps, as fast as 3s =::::: 50k 100k to :::::5k 10k 20k when it ceased 1k 2k to 1kHz. However 10 20 50 100 200 500 from 100Hz FREOUEHCY IH Hz 70v'

68 STUDIO SOUND, FEBRUARY 1982

www.americanradiohistory.com REW cuts the cost of leading pro equipment

JBL 4301 Bookshelf Size Superb Quality Phone Control Monitors us now R, R. P. £.2-96 + VAT Old Cash Price £2é8 -2U + VAT Special Offer Price £194.79 + VAT Unbeatable Value. Hurry Very Limited Stocks.

Specials For Teac Owners

MB20 metre bridge for model 2A mixer. R.R.P. £.4.29 7 + VAT Old Cash Price £44-2-67 + VAT Special Offer Price £86.09 + VAT Teac A -3440 4 RX9 dbx for 3440 channel tape deck R.R.P. £346-.16 + VAT complete with a high quality Old Cash Price £30+ -70- + VAT Special Offer Price £200.00 + VAT fully compatible 6/4 mixer built WAVOtiiaiiiaiiiuiura,:;,, to our specifications by a leading mixer manufacturer. Unrepeatable Offer. Buy now ... ask about our easy credit terms. DX8 dbx for 80 -8 R.R.P. £44&57-6-6 + VAT R. R.P.£ßé -87+ VAT Old Cash Price + VAT Old Cash Price £764:6 + VAT Special Offer Price £694.78 + VAT Special Offer Price £899.00 + VAT

Revox B77 high speed still available at FOSTEX the old price 1! IN STOCK £520 + VAT NOW. but not for long. . : . : Mis. REWPROFESSIONAL AUDIO 114/116 Charing Cross Road, London WC2. Tel: 01.836 2372/7851 69 www.americanradiohistory.com reviews be able to completely tollow a sweep the display Noise measurement the A -curve was found to be correct at 1 kHz with appeared as a series of dots. The measurement of noise involves the use of two the CCIR /ARM curve reading 0.5dB too high at In the crosstalk measurement mode the rectifier characteristics - true RMS for the ANSI the nominal unity gain point at 2kHz. frequency sweep proceeds from 20kHz to 20Hz in measurement or `average' for the CCIR /ARM The three measurement methods were contrived for use with mechanical meters with steps of the standard '' //- octave filter frequencies. and the NAB measurement. These characteristics Accuracy of the crosstalk (channel separation) were found to be correctly selected in both the linear scales, it is therefore not possible for an measurement was found to be within 0.5dB at weighted and the unweighted modes with the autoranging logarithmic electronic system to levels down to - 60dB. At lower levels of cross- frequency response of the system being as shown precisely follow the dynamic metering require- talk substantial errors occurred irrespective of the in Fig 3 in the unweighted mode. It should be ments. However the bar display offered a input level. noted that the HF roll off at 12dB /octave should performance not far from a VU meter. frequency rejection when Residual noise was good with the wideband Distortion be adequate for bias measuring the record /replay state. residual being -95.5dB reference IV using the As the distortion measurement arrangement starts frequency weighting in the weighted modes average rectifier or 1dB worse using the RMS measurement at a level elevated by 10dB its use on The weighting rectifier. In the weighted modes a 'SIGNAL TOO other than tape recorders (which are is shown in Fig 4 which shows the CCIR equipment LOW' indication occurred at -90áB in the tolerant of overloads) must be treated with and the A- weighting used by NAB and ANSI. CCIR /ARM mode, - 95dB in the ANSI mode or caution. However, the instrument's overall Tolerances were found to be well within the requirements of CCIR Recommendation 468 and - 96dB in the NAB mode all reference 1V residual distortion of 0.0207o second or third - 179 the A- curve. The unity gain point of RMS. It was however found that the 'SIGNAL makes it attractive for use with other IEC for harmonic TOO LOW' indication occurred not far from the of the selective dis- equipment. The sharpness instrument's residual noise and that measure- tortion measuring filters was such that the 1kHz TABLE 1 ments in a 10dB range 'above the warning level input could vary from 970Hz to 1.01kHz without Instrument error Indicated error Actual error could be several decibels in error. significant errors, thus showing that wow and + 2.106% + 2.098% 0.008% 0.006% to interfere with the accuracy +1.127% +1.121% flutter are unlikely - 0.288% -0.291% 0.003% Azimuth measurement of the distortion measurement which was found to - 1.327% - 1.330% 0.003% The accuracy of the phase error readout at the be within ±0.5dB. - 3.357% -3.361% 0.004% four test frequencies was checked at eight different phase errors and found to be within 10% MM.... MOW mM.....IMM.... M IMM=....MIEM1MM.... MIMM.M _-.. MI of the actual phase error. This is generally better FIG.4 M_M_. MMM..ór. --. .i _ MIIt1 SOUND MIMMEMMEM C specified and certainly than the ±5° of phase IMoIM=11,1.. M=MIAMEIMMEI... MI TECHNOLOGY ::mm=El ii:.:i: more than adequate for tape recorder alignment. _C_CC::::C_ tC MODEL MIMIIMMIGNME IMP MM. 1500A -- --IC FREQUENCY mmC:::: m m:::: C Drift, wow and flutter measurement RESPONSE - m::::IM.M...m::', MMI=... :'.'.7:mC:.m Checking the frequency of the oscillator output in WEIGHTED M...-- C. .C OMIMIMMIMMIMMM the drift or wow and flutter measurement modes .. 1.11 mC:::: m::::rGmmm:'.'.: MC:'.'.'. CmQm showed the frequencies to be 3kHz or 3.15kHz .M= Mil mMEIMMMEM WMmm= m..,. EMI :'.'.'. MI =C (for US or European standards) at 0.0029 %. ..m_ 11.1 MIWIMMIMME E. mmG:EM - m:'.CC7.mm '.'. MI miv::::.:m When checking the speed the instantaneous C::C:ICI:.::.: IC IMI M ZmCmCC ==:'..ICmm... mCM C speed indication had a resolution of 0.04% and ¡MIMI VA. .... was accurate to within the resolution. Similarly mMOW...... m mmC:'.'.:=m mC::::mImCC_::_ speed was mC::: Cm° the accuracy of the lOs averaged M::::mmm0:'.:' Mm::::C=:mC .. M.MMIEMIMMWE: excellent as shown in Table 1. C'G =C:::m::mCmM:::m mCC ::mm_CgC The instrument's residual wow and flutter was mC::::mm. found to be 0.004% to the NAB standard, 0.005% _ "-m:...m:'.: m mC1C::1C m=__:::=°_ to the JIS standard and only 0.001% to the IMMIMMMEmC::::m:m:m :::: MMIIIMIMME :::::Ì IIMMINM DIN /ANSI (or more correctly the instrument _:': , m :::C _::::I 386). mC::: 1CC::::I mC'.:'. Ell= = should be labelled IEC Recommendation M..... mC:... C:::: mmM--- Whilst the unweighted wow and flutter M.... IM M,MC 7 mC::::= mCO:::: indications were found to be accurate it was found mi.o.=ooiMM .. IMMIIIM.... MM.... M.. "mCmC:::: m_W_M::::mCC....= that the HF section of the weighting curve was mC :::M=M....M=.... mMC::::Cm m= in Fig 5. 1==.... MvM incorrect as shown MIMMIMMEm::::mmCC:::: mMC ::mCm When measuring the IEC (CCIR /ANSI) mode mC :: :::: mC::::CCCm the ballistics of the display were close to the m::::mmIIMMI =C:'.::mCm:::MWIMIMMOMM m:m::::CmmmC :: m:=--..mmmm required standards when testing with undirec- 20 50 100 200 500 1k 1k 5k 101 20k 40k tional bursts of flutter and with the exception of FREQUENCY IN Hz the weighting network problem the performance was very good.

M1.1 .MMMIEMMEM MUM. =MOM 1.11 FIG.5 IM MMIM=MMII. 11=11= MIME! Summary SOUND TECHNOLOGY mi::ii MOM. MODEL 1500A C::::Cm MM.m . This most complex instrument offers what must WOW AND FLUTTER m__::::_m_ =_:::' .= be the most comprehensive and accurate tape == C:'.'.'. LCmCC:::: Mk recorder test unit yet made. As a result it takes IMEM MIp _m_mCC:::: M... some time to master the measurement methods. MEASURED CURVEC .11 ::.mOm ::::m:C :.:: MII the are familiar the :.:::_M =_.... M... However, once all possibilities OW _ _mCm::::CM... - O::'.GC instrument is very quick to use and undertakes all STANDARD LI MITS IM =r111=12= Cm mCC::: Mil tests without any changes in cabling. OI I°:::mm The levels usable at the inputs and outputs and .::::mmC:::: the fact that they are unbalanced suggests that the _==... C__:::: _CMIM C...._:C.OmOmC::'.: MC::::mm design is aimed at domestic and semi -professional MM.....m:... M.... MIMMOMMEM Mili tape recorders, but this does not mean that its use O MI MM... M tt:'''mm on professional equipment is particularly ..: mCC:'.::m restricted. _'' mC::::'.'.: m MIMMEMImC::::m Overall this is an excellent instrument for tape C.C. MMIMMMEN recorder maintenance and many of its features 50 100 200 0.1 0.2 0 5 10 20 can be used for general maintenance of audio FREQUENCY IN Hz equipment. Hugh Ford

70 STUDIO SOUND, FEBRUARY 1982

www.americanradiohistory.com Here's Why! Throughout the world WESTREX is the name, that for over fifty years has been coupled with the finest quality in studio sound and recording. Today's range of equipment reflects the WESTREX insistence on the latest technology with a practical approach for day to day studio requirements to ensure you get the very best results. LRA 1551 Dual Unit reproducers & recorder /reproducers The LRA 1551 Dual Unit is a special version of the Westrex Vertically mounted Reproducers with two film mechanisms in the standard 21,5" wide rack. These may be two 16mm Units, two 35mm Units or one of each. One or both may be equipped for recording. One motor drives both units. Reels are staggered to accommodate 2000ft of film. Operating speeds of 24 or 25 f.p.s. are provided. Motor drive systems must be specified and ordered separately- single phase or three phase, synchronous or interlock drive motors are available -50 and 60Hz power at 115 or 230 Volts can be accommodated. Complete interlock systems offering forward and reverse operation with remote control are designed to fit your every requirement. Post -Synch Option Available on single or multiple Westrex channel recorders, 16mm or 35mm. Record Head switches from output of record amplifier to input of reproduce amplifier to permit playback synchronously with The picture or other tracks. Switching is automatic. Pick -up Recording Option International Available on single or multiple channel recorders, 16mm or 35mm. This facility makes it possible to switch into the Number One record /erase mode and back out at any time in the recording process without discernible clicks, noises, or changes in recorded in Sound level. It is possible to insert correction, delete errors, add extensions and post -synch dialog. Selective record /erase on multiple channel units. The Pick-up Recording Option may be Recording added to nearly all types of film mechanisms. For full technical data sheet, prices and delivery contact Equipment The Westrex Recording Division world wide Headquarters at:

Westrex distributors throughout the world include: Westrex Company Limited, Fairway Drive, Australia - Studio Sound Systems - Sydney Bilton Fairway Estate, Greenford, France - Hi Fidelity Services - Paris 1: Westrex Middlesex UB6 8PW. India - Cinerama PVT - Bombay Litton Telephone: 01 -578 0957. Telex: 923003. Singapore - Rank O'Connors - Singapore Offices in Burbank, U.S.A., Tokyo and Hong Kong.

71.

www.americanradiohistory.com review/

Kiark Teknik DN60

real time spectrum analyser

MANUFACTURER'S SPECIFICATION Display ing requirements. Analyser section 31 x 16 -LED matrix display with selectable Net weight: 17.641b (5kg). Functions: selectable real time and peak hold can resolution of 1dB or 2dB per LED. Variable bright- Shipping weight: 11.031b (5kg). be displayed together. Peak /average - processor ness control. Multiplex (scanned) operation. Price: basic DN60 £995. Internal communications controlled averaging. Three separate memories. interface £150. XY plotter interface £90. Paper Tiger Three response times, processor controlled attack Pink noise source interface £90. RTeo reverberation analyser £200. and decay times. Selectable A- weighting filter. Generator. digital pseudo random white noise Microphone preamplifier £70. Microphone capsule Filters: 1/3- octave filters on 30 ISO bands from 25Hz generator and pink noise filter. £45. Printer £600. XY plotter £900. to 20kHz. Double section pole -pair filters meet Flatness: ±1.5dB (20Hz to 20kHz) measured rms Manufacturer. Klark- Teknik Research Ltd, Walter requirements of IEC 225. Relative flatness ±0.5dB. with 10s integration time. Nash Road West, Coppice Trading Estate, Rectifiers - quasi -peak fast response (attack time Output level: + 4dBm rms (nominal) via XLR Kidderminster, Worcs DY11 7HS, UK. frequency dependent). connector on rear panel. USA: Klark- Teknik Electronics Inc, 262A Eastern Output: gateable output amp. Output impedance Parkway, Farmingdale, NY 11735. Overall level section 1kO. IN ITS basic form the Klark Teknik DN60 is a General: all functions and performances as analyser section with the exception of: Other features microprocessor controlled -octave spectrum Frequency response:15Hz to 22kHz ( - 3dB points). Converter: fast logarithmic AID converter covers analyser covering the ISO standard centre Rectifiers: peak/average uses separate rectifiers. 31dB in 1dB steps. Accuracy ±0.2dB at any level frequencies from 25Hz to 20kHz. However from reference level. accessories are available Input section Memory: stores entire 31dB and all relevant switch various interfaces and Microphone: differential input with adjustable information. Display can be 'expanded' when in not only to provide a computer interface but also sensitivity from 0.25mVlµbar to 1mV Nbar. To suit memory recall mode. for X/Y plotters, printers and also for reverb time display entire most capacitor microphones. Phantom powering External display: all accessories measurement in terms of RTso. provided at 14VDC via 2kS2 resistors to suit AKG 451 31dB range in 1dB steps and all switch information. Series microphones. Interface: intelligent talk and receive output As standard the unit is designed for mounting Line: differential input for balanced or unbalanced available to suit automatic testing and control into a 19in rack with the front panel having the lines via XLR connector on rear panel. Input equipment. correct mounting holes and the unit occupying Connectors: Microphone input XLR D3F style. impedance 47kO (nominal unbalanced connection). - two rack units in height. Attenuator: reference level switchable in 10dB Line input -XLR D3F style. Noise output - XLR steps from +20dBm to -50dBm or 120dB spl to D3M style. Power -3 -pin CEE. To the left of the front panel is the level display 50dB spl. Accuracy ±0.2dB. Power requirements: 110/120/220/240V (specify comprising an array of red LED indicators in 31 meets IEC 651 when ordering). 50 -60Hz at less than 30VA. A- weighting: selectable network columns each 16 LEDs high. The 30 left hand type 1 requirements. Operates on both microphone Dimensions: (whd) 19 x 31/2 x 10in (482 x 89 x and line inputs. 257mm). Complies with standard 19in rack mount- 74 ) 72 STUDIO SOUND, FEBRUARY 1982

www.americanradiohistory.com THE Melkuist GT 800 GREAT Automation System... BRITISH ... by musicians SPRING Spring Reverbs are notorious for the odd for musicians sounds that they tend to produce. Many manufacturers have tried to remedy this with limiters, egLalisers and the like. In the design of The Great British Spring' we took a different approach. We started out with a custom spring unit that sounds good without any fancy electrcnics. The unit simply has a variable line input and a stereo output. The six spring paths produce a natural sounding reverberation that is full at the low end and sparkling on the highs. But don't take our word for it. Fifty pence brings you cur demo cassette, or drop in and hear it live.

,.»

A high speed, SMPTE locked, floppy disk based automation system, for retro -fit to most Audio mixing consoles. VCA fader packages available to suit non automation ready consoles.

Exclusively from: TURNKEY, 8 East Barnet Road, New Barnet, Hefts Melkuist Ltd, 01 -440 9221 MICROFROCESSOR SYSTEM, DESIGN AND PRODUCTION REW, 114 Char ng Cross Road, London WC2 Photograph courtesy of Lansdowne Studiosi 01 -836 2372 STUDIO EQUIPMENT SERVICES, 100 Hamilton Road, FWD. Bauch Limited London NW11 01 -458 9133 49 TheObald Street, Boreham VVood, FiertfoCCjShÌre VVD6 4RZ DON LARKING AUDIO, 50 Cheapside, Luton, Beds T- - 01-953 la Telex 27502 1)582 26693

www.americanradiohistory.com review/

columns cover the 1/2- octave analysis with the right hand column giving a normally unfiltered display of level. In order to obtain a sensible display of sound levels the right hand unfiltered column is 10dB less sensitive than the remaining columns which cover the 30 ISO recommended centre frequencies. The vertical resolution of the whole display can be either IdB or 2dB giving a range from zero to either 15dB or 30dB in the right hand overall level display or 10dB to either 25dB or 40dB in the 1/2- octave bands. A screwdriver operated potentiometer behind toroidal power transformer and three clearly signalled by the two lower LEDs in a column being the front panel controls the brightness of the identified fuses. extinguished whilst the remainder remain illumin- complete display with the maximum brightness On the left the PCB in the base of the unit acts ated - alternatively, when in the peak hold mode being more than adequate for easy reading in quite as a mother board for the majority of the electro- the top two LEDs remain illuminated under over- bright ambient lighting. nics which are mounted onto seven plug -in filter load conditions. To the right of the display matrix six push- boards, a rectifier board and in the case of the Checking the centre frequency accuracy of the buttons together with associated LED displays review instrument three other boards. The LED ' /3-octave columns in terms of the square root of control the overall functions of the unit. One display and the front panel controls are also the multiple of the two 3dB frequencies showed button selects a choice of three separate memories mounted onto printed circuits which have flying that the maximum errors were +3.8 %, 4% for recording the matrix display and also the leads which plug into the mother board. which is quite adequate for the purposes for which significant switch settings. The memories in fact All components on the printed circuits have the analyser is intended. The shape of a typical store the full available dynamic range with 1dB clear identifications and integrated circuits were passband is shown in Fig 1. resolution such that stored data can be displayed socketed for ease of servicing. Clearly the form of The accuracy of the indicated level steps was with either 1dB step or 2dB step resolution. When construction is designed to ease maintenance and also carefully checked in both the 1dB /step and in the normal continuous display mode data is repair, it being extremely easy to replace either 2dB /step ranges and found to have a worst case entered into memory by selecting the required PCBs or components. error of only 0.05dB for the just illuminated point memory number and then pressing the `store' Overall the standard of construction was of the indicators. pushbutton at the desired instant. excellent and the front panel layout proved A further pushbutton selects either an excellent in use with all control settings being Level accuracy and frequency response averaging rectifier characteristic or a quasi -peak clearly shown. Using the wide band display the frequency characteristic with the adjacent button selecting a response was to all intents and purposes flat from choice of three display time constants. When Display 20Hz to 20kHz with the 3dB points at 13Hz and storing the display, the settings of these switches As mentioned earlier the display consists of 31 23kHz with the peaks of the 1/2- octave filters also are stored and displayed adjacent to the switches vertical columns of 16 LED indicators all of which being to all intents flat in level. in the memory recall mode. are controlled by a variable brightness pot behind In terms of absolute level using the line level The remaining two pushbutton switches in this the front panel. This control was found to have a balanced input the indicated OdBm in the wide section of the instrument provide a fast peak hold useful range with the brightness of the LEDs band display was found to be +0.12dBm for the function and select the instrument's mode from remaining uniform across the display. just illuminated condition of the display - a between the normal continuous mode, memory Switching on the unit illuminates all LED creditable accuracy. When using the balanced mic display and external: the status being displayed by indicators for a short time and then initiates a self input the 1pbar (74dB spl) indication is deter- three adjacent LED indicators. test routine at the end of which the LED display mined by a trimming pot within the unit with a To the right of this section is the input section signals 'OK' if all is well. As with any spectrum nominal range from 0.25mV/pbar to 1mV /pbar which consists of a rotary attenuator switch and analyser overload conditions can exist in indivi- to permit matching to common condenser micro- two pushbutton switches. One of the pushbutton dual '/3- octave columns and such a condition is phones. 76 switches selects the display resolution from either 1dB or 2dB step with the second switch performing two functions. Brief pressure of the switch changes between the line and microphone FREQUENCY 0 tfo 0.5fo 0.5fo tfo 12f. 1 tfo inputs with the selected input being displayed by a FIG.i KLARK TEKNIK DN 60 nearby LED. Prolonged pressure of the switch in FILTER SHAPE either input selection switches a standard A- weighting network into circuit, the presence of the network being indicated by an LED. -5 Turning to the input attenuator switch, this provides 0dB indications in 10dB steps from + 20dBm to 50dBm for the balanced line input -10 or from 120dB spl to 50dB spl for the balanced mic level input. The latter is an XLR connector to the far right of the front panel above the power -15 on /off switch with its nearby power indicator. The balanced line input and the unbalanced noise output take the form of XLR connectors at -20 the rear panel which also houses the IEC mains power connector and has apertures for external interface cables. -25 The removal of four securing screws give access to either the top or bottom of the internal parts, the bottom surface of the enclosure being covered -30 by two good quality PCBs. To the right is the dB stabilised power supply with its cool running 74 STUDIO SOUND, FEBRUARY 1982

www.americanradiohistory.com 0 0 0 0 0 0 0 Q Q 0 0 0 0 00 00 Q 0 0 0 0 0 Jacks &Jackfields 000000000000000000000000 c;000000.004ao for Recording and MIMPIMIlrlimporris. 000ciaaucoPeenveaeopoopoo Broadcasting 1Traremmerartitmer...... _

oot000.oct clive:ao 000'o coo og Mosses and Mitchell are recognised as being the largest IMINTimmensmarmr. manufacturer of Audio Jacks and Jackfields in the U.K. We are approved suppliers to the B.B.C., the Post Office, Pye T.V.T., Pye Telecommunications, Mercia Sound and many other major users.

v We have a policy of continued design and technological v innovation and are now able to offer miniature type Jacks and Jackfields which can be supplied with MOO wire wrap terminals as an alternative to the wwW.ovvIv40 e traditional solder terminals. - fa 4#411IOW$104JilirSJ At our modern factory in Farnham, Surrey we ililie are equipped to offer a flexible manufacturing ' ------6:6-- Qag service geared to meet your individual -4-44444QP specification and delivery requirements. MM / Mosses & Mitchell Limited, Weydon Lane, Farnham, Surrey GU9 8QL Telephone: Farnham 721236 (STD 0252) Telex: 858820

www.americanradiohistory.com review/

As supplied the sensitivity was 0.9mV /µbar to normally supplied AKG C451 match the FIG.2 IEC 179 TOLERANCES MEN iMla preamplifier with an AKG CK2 omnidirectional KLARK TEKNIK DN60 A- WEIGHTING ACCURACY ::: capsule. C:::=:5::::::.=i ::111;:: Measurement of the frequency characteristics : = = of the internal A- weighting produced Fig 2 which :C .-l=C shows that the instrument is very well within the -- ::::CÇ:::CC.7C IEC Recommendation 179 tolerances. --=MEMO VAS . C C::::=::::.:---_._ NM =______... __. :::111iC=1:::::111C: Inputs and output CC::::C=:'.:7=0 Investigating the mic input showed that it had a =_C:: =___= :':: C=CC::___ MEE constant input impedance of 2,62152 which is Ç:::O __==C:::==C normal capacitor mics. VAIEEEME adequately high for any = = _-::::==C-::::CC The DC phantom powering was found to be 12.59V which is a little below the nominal 14V but O:::CC::BC=::0=:_=CC EIM1=1.10_. 11= E===__ MC_ =C. C=C___=C__:::==C should not cause trouble in normal operation. I 20k When powering is not required it may be readily 50 100 200 500 1 2k 5k 10k 40k disconnected within the unit. FREQUENCY IN Hz Turning to the CMR ratio, this was found to be constant with frequency at 58dB for the mic input or 44dB for the line input which also had an adequately high input impedance of 95k52 when FI0.3 KLARK TEKNIK DN60 or 55ko when using the input B::::CC=C::::__::::_C operating balanced PINK NOISE OUTPUT Á::::== ::::__: ::::C_=El unbalanced. '¿.::::____....______.____. __M_._ The fixed level pink noise output was found to =::6: ' ::::C:=t0::: deliver + 4.6dB reference 0.775V from a source CB::::..CC:::CBC:.=. J,.,.. .. inpedance of 9790 unbalanced. Whilst it is ___ ..=...._:i perhaps unusual to have a fixed level output the C::::CC -". :, :CC::: YE°,:C::::_ level is adequate for feeding most sound systems joej _ B:: _... cr+F C normally have their internal 1C C= and these would ::::==. , :::: attenuators and not overload at + 5dBm input! 1= C::::i111C=::::::111I: As shown in Fig 3 which is a constant bandwidth BB::: :::t. spectrum analysis of the pink noise output, the . __--.::: ::::_'::_..__. =:::: frequency distribution is very close to the required ==C:::CO=:'.::C_=C _=C=:::: - 3dB /octave and certainly far better than the ___.... _=C:::: ___ =El would suggest. _CB:::C manufacturer's specification ____ O =_-- i 20 50 100 200 500 1k 2k 5k 10k 20k

FREQUENCY RI Hz Other inbuilt features Investigating the rectifier characteristics showed that a true average or true peak indication was shown with three time constant responses as On the side of the interface unit five pairs of follows. 3mm sockets on the standard' /ain spacing connect In the peak rectifier mode the attack time for the oscilloscope and the X/Y plotter with two the equivalent steady state indication was fixed at pairs of sockets providing 0 to 1.5V X and Y out- about lms with the fall time to - 20dB indication puts, and a third pair of sockets providing an being selectable by the response switch as 0.5s, is automatic pen lift. The latter is an open collector or 2.5s. In the average rectifier mode the response output rated at 100mA and +60V. switch changes both the attack and fall times, the The remaining two pairs of sockets interface an fall times being as for the peak mode with the rise oscilloscope giving a 0 to 1.4V Y output and a times being 300ms, 500ms or 800ms respectively. negative trigger pulse output every display scan, Operation of the three internal memories was the latter being a 5V to OV 30µs pulse every 15ms. found to be a delight with the original control As shown in Fig 4 the oscilloscope displays all settings (except for the input step attenuator) 1/2-octave bands plus the overall unfiltered level at being displayed as each store is selected. the right of the display with 1dB resolution. When using the X/Y plotter the oscilloscope display is inhibited whilst the plot takes place, this LGBI Oscilloscope and X/Y interface which not only store the display, but also control occupying just under a minute and the plotter only works This interface allows the display of the DN60 to be settings; and the peak hold function which giving the 1/2 -octave bands with 1dB resolution. either continuously displayed on an oscilloscope with both the peak and average rectifier settings. Clearly the interfaces provide for almost any The front panel controls are uncluttered and or plotted on any general purpose X/Y plotter once a simple X/Y plotter or oscilloscope and clearly identified and the display is easier to read always with a 1dB resolution. The interface calibration has been done accurate permanent box which connects to than that of many units of this type. comprises a small plastic records of the current or the memorised displays means a ribbon cable Finally, the manufacturer provides a block of the DN60 analyser by of may be obtained. which plugs into the rear of the analyser. pre -printed transparent overlays for the display the On the top of the interface are two pushbuttons; such that a writing instrument can record to provide a one for calibrating the X/Y plotter and the other Summary display indications on to the overlay to tell the plotter to plot the current display on the The Klark Teknik DN60 is an excellent general permanent record. purchase a analyser. When the latter is pressed the current purpose 1/2-octave analyser for the alignment of Alternatively one can of course with the unit, display is stored for plotting and all LEDs in the sound reinforcement systems and general studio plotter or printer which interfaces the reverb time display are extinguished and all control settings purposes. another important accessory being Hugh Ford frozen. Particularly nice features are the three stores measurement unit. 76 STUDIO SOUND, FEBRUARY 1982

www.americanradiohistory.com AUDIO SYSTEMS LTD WITH 40 YEARS' EXPERIENCE IN THE DESIGN AND MANUFACTURE OF SEVERAL HUNDRED THOUSAND TRANSFORMERS WE CAN SUPPLY: PROFESSIONAL FILM RECORDING EQUIPMENT PURCHASED EQUIPMENT FOR SALE AUDIO FREQUENCY TRANSFORMERS OF WESTREX RCA 16mm recorder, solid state, 24/25 £3000 16 /35mm Sunbury reproducers, solid 16mm recorder, solid state, 24/25 £3000 state, £2500 EVERY TYPE 16mm recorder and reproducer, 2 mechs. 35mm 99 series reproducers, solid in 1 rack, solid state, 1200ft. £5500 state £1750 35mm recorder, 24/25, "rock & roll ", MAKE 35mm 24 frame, 66 series mechanisms YOU NAME IT! WE IT! valve electronics £1500 only, 6 machines available, each .... £250 OUR RANGE INCLUDES NAGRA Unilock - electronic interlock £500 IS -L NEW £2100 Test Equipment miscellaneous items Microphone transformers (all types), Microphone Splitter/Combiner transfor- available mers. Injection transformers for Guitars, Manufacturer's warranty Input and Output transformers, Direct MISCELLANEOUS ITEMS Multi- Secondary transformers, Bridging transformers, Line transformers. output RCA 35mm projector, FEDIS type 70, "rock & Line transformers G.P.O. Isolating Test Specification, Tapped impedance to OPTICAL RECORDERS PM BOA roll ", light matching Pickup Audio Mixing Desk zenon source, £3500 transformers, Gramophone transformers, 16mm, mint condition £12,000 transformers (all Microminiature transformers MOTORS, sync /interlock, 1000 rpm and types), Miriature transformers, 35mm, mint condition £12,000 for PCB mounting, Experimental transformers, Ultra low frequency transfor- 1500 rpm. mers, Ultra linear and ocher transformers for Valve Amplifiers up to 500 watts, MALCOLM STEWART, Inductive Loop Transformers, Smoothing Chokes, Filter inductors, AUDIO SYSTEMS INTERNATIONAL, 111 HARROWDENE ROAD, Amplifier to 100 volt line transformers (from a few watts up to 1000 watts), 100 WEMBLEY, volt line transformers to speakers, Speaker matching transformers (all powers), MIDDLESEX, HAO2JH, ENGLAND. TEL: 01- 9084008 Column Loudspeaker transformers up to 300 watts or more. We can design for RECORDING QUALITY, STUDIO QUALITY, HI -FI QUALITY OR P.A. QUALIT". OUR PRICES ARE HIGHLY COMPETITIVE AND WE SUPPLY LARGE OR SMALL QUANTITIES AND EVEN SINGLE TRANS- FORMERS. Many standard types are in stock and normal dispatch times are short and sensible. Get binding! OUR CLIENTS COVER A LARGE NUMBER OF BROADCASTING AUTHOR- ITIES, MIXING DESK MANUFACTURERS, RECORDING STUDIOS, HI -Fl ENTHUSIASTS, BAND GROUPS AND PUBLIC ADDRESS FIRMS. Export is a Keep your copies of STUDIO speciality and we have overseas clients in the COMMONWEALTH, E.E.C., SOUND in smart black binders U.S.A., MIDDLE EAST. etc. (each holds 12 copies) with title in Send for our questionnaire which, when completed enables us to post quo- golden block letters on the tation by return. spine. Price: £3.00 each which includes inland and overseas postage. Send your order with cheque or postal SOWTER TRANSFORMERS order to: Modern Book Binders Ltd. Manufacturers and Designers Chadwick Street, Blackburn, Lancs. E. A. SOWTER LTD. (Established 1941), Reg. No. England 303990 (state clearly your name and address The Boat Yard, Cullingham Road, Ipswich IP1 2EG, and the relevant magazine title). Suffolk. P.O. Box 36, Ipswich IP1 2EL, England. OVERSEAS READERS MUST SEND INTERNATIONAL Phone: 0473 52794 & 0473 219390. Telex: 987703G MONEY ORDER I LINK HOUSE GROUP

NO SPECIAL OFFERS !

NO PRICE REDUCTIONS !

STILL BEST VALUE !

FUNCTION GENERATOR TYPE TG301 £145

FREQUENCY O.02Hz to 2.1MHz in 7 decade ranges.

WAVEFORMS Sine, Square, Triangle, Pulse and Ramp.

DC OFFSET Variable up to +10V from 500.

MAIN OUTPUT 60mV to 20V peak to peak from 500 source. VCF (EXT. SWEEP) 1000:1 frequency ratio by application of 10V p- p.

Send for full technical specification together with details of our Voltmeters, Oscillators and other test instruments. The price is ex works excluding VAT.

LEVELL ELECTRONICS [TO. MOXON STREET, BARNET, HERTS , EN5 5SD. TEL 01 449 5028.

www.americanradiohistory.com Classified Advertisements

Advertisements for this section must be pre -paid. The rate is 35p per word, minimum £8.75. Box Nos. £1.50 extra. Semi -display rates on application. Copy and remittance for advertisements in APRIL issue must reach these offices by 10th FEBRUARY addressed to: The Advertisement Manager, Studio Sound, Link House, Dingwall Avenue, Croydon CR9 2TA. Note: Advertisement copy must be clearly printed in block capitals or typewritten. Replies to Box Nos. should be addressed to the Advertisement Manager, Studio Sound, Link House, Dingwall Avenue, Croydon CR9 2TA, and the Box No. quoted on the outside of the envelope. The district after Box No. indicates its locality. SEX DISCRIMINATION ACT 1975: No job advertisement which indicates or can reasonably be understood as indicating an intention to discriminate on grounds of sex (e.g. by inviting applications only from males or only from females) may be accepted, unless (1) the job is for the purpose of a private householder or (2) it is in a business employing less than six persons or (3) it is otherwise excepted from the requirements of the Sex Discrimination Act. A statement must be made at the time the advertisement is placed saying which of the exceptions in the Act is considered to apply.

The attention of advertisers is drawn to The Business Advertisements (Disclosure) Order SPEECH RECORDING 1977 ", which requires that, from 1st January 1978, (VOICEOVERS ; LANGUAGES: AUDIO VISUALS ) all advertisements by persons who seek to sell goods in the course of business must make that HIGH -SPEED CASSETTE COPYING fact clear. From the above date, consumers OPEN -REEL COPYING therefore should know whether an advertisement SPR relates to a sale by a trader or a private seller. (ANY SPEED ALSO TO BROADCAST SPEC) HIGH QUALITY BLANK CASSETTES (CI -C120) LABEL & CARD PRINTING SERVICES SPEECH -PLUS RECORDINGS LTD UNIT32, NO19,PAGES WALK, LONDON, SEI 4SB. 01-231 0961

CASSETTE duplicating from 38p.1 -1 /Hi- speed. `SSP were very good quality, the best value for money', Sound International, July 1981. Com- prehensive P /L. 46 West End, Launton, Oxon. 08692 2831. X -4tond-retildfrad TANNOY A QUALITY pressing and duplication service provided to studios, etc. Complete with cutting, SERVICE processing, labels, sleeves, art work, inlays, etc. Cassette and open reel Minimum order for LPs -250, singles -500, copying. Custom wound We have an extensive stock of Tannoy spares cassettes -250. For further details: SRT Record blank cassettes supplied. and exchange units and offer a prompt, effi- and Tapes Ltd., 01-446 3218. X cient service including delivery and collection. Studio available for voice We perform B Et K analysis on all units to factory overs. Dolby A & B. Design set specifications. TURNKEY Record and Tape Plants. Complete artwork and print services. For all repairs, contact the factory accredited service from Record Manufacturing Services service agents: Elliott Bros. Ltd. Ltd., 13 Elm Road, Faringdon, Oxon, 0367 20262. Telex 858623. C Sound Cornrnunilcation ELLIOTT BROS. (Audio Systems) Ltd. F Huuu Weihnylon Road, Dewsbury, West Vurwsh.re WF 13 1IIF 9 Warren Street, London W1. Tel. 380 -0511 Telephone 0924 451717 THE COMPLETE SERVICE. Disc cutting (masters and de:nns), pressings, sleeves, cassettes, labels. Fixed and mobile recording studios. Free brochure. TAM STUDIO, 13a Hamilton Way, London N3. Tel. 01- 3460033. F

PRESSINGS of classical quality (colour also), promptly manufactured from your master tapes. Sleeve printing, mailing service. Studio or mobile units for master recording. Specify requirements MOBILE SOUND MAINTENANCE RING US .. . to Mike Bull, Sound News Studios, 18 Blenheittt Road, London W4 1ES. Tel. 01 -995 1661. F FOR BLANK CASSETTES CASSETTE DUPLICATING Performance modification rebuilds EMPTY SPOOLS WHITE TAPE BOXES LEADER TAPE .1" TAPE IN ALL LENGTHS Emergency 24 hour fault finding BT CARTRIDGE BODIES SPLICING TAPE New and second -hand equipment -! "NAB REFILLING SER. RAZOR BLADES Epd reports evaluation RING 01 -399 2476/7 MULTIPLE REAL -TIME Servicing STUDIO- STANDARD CASSETTE- RECORDING System checks MEDIATAPE LIMITED THE PROFESSIONAL SERVICE BY STUDIO ENGINEERS AMPEX MAGNETIC TAPE STOCKISTS CONTACT DAVE SIDDLE Contact us for bookings now WHY NOT PHONE US NOW FOR A QUOTE? CASSETTE PROJECT DEVELOPMENTS Telephone: 01- 948 1331 (24 hours) 8 Newport Crescent, Waddington, Lincoln LN5 9LZ YOU AFFORD NOT TO Lincoln 105221 722171 13A Jocelyn Road, Richmond, Surrey CAN

78 STUDIO SOUND, FEBRUARY 1982

www.americanradiohistory.com SERVICES FOR SALE - TRADE r------% s MAIN 3M WOLLENSAK DEALERS FACTORY FRESH PROFESSIONAL TAPE kMeticulous alignment of all machines before sale. `Excellent servicing facilities. SCS Cassettes C2-C100 on orders of 100 and over. Stockists for 3M Audio N 1 and Video cassettes. Fast -copying service. Prompt' personal attention Brand new and unused 1/2,,, 1", 2" mastering tape SOUND CASSETTE SERVICES LTD. FROM EMI TAPE h P.O. Box 2, Chard, Somerset TA20 1 LR. Tel: 04606 5393 Now available ex -stock at special prices, for details please ring iIAI AEI ,4W /Mr Al . AMA STEVE CASTLE TOM ELLARBY HIGH SPEED CASSETTE COPYING 0494 715031 0202 515491 AND VIDEO TRANSFERS MERCURY STUDIOSOUND 86 Wardour Street, London W.1. 01 -734 0263 FOR SALE -TRADE SINGLE -EDGE BLADES 100 C-60 cassettes beautifully copied in stereo £5.00 lint. VATI per box of 100. Cheque with order please. Just £59.50 (plus VATI Agents wanted in most areas. We can copy from 100 to 5,000 high quality cassettes on Very Special Prices are available for Wholesalers. our high speed loop -bin system, load them precisely into top - class shells. Price includes library case and all production 3M Wollensak Cassette Copies, also endless loop work from your ' /.in edited master. Any length C -5 to C- cassettes, single edged razor 90.NOW ALSO cassettes in GOLD effect finish! Ring for blades. Sound price check. Marketing & Services. Tel. Norwich (0603) 45338. STUDIO REPUBLIC X 41 High Street, Pinner 01- 8685565

PRE -PACKED screws, nuts, washers, solder tags, studding. Send for price list. Al Sales (L), REVOX SERVICE P.O. Box 402, London SW6 6LU. J ODD -JOB BLADES LTD 62 Kenilworth Road, Edgware, Middlesex A77, B77 and A700 Tape Recorders. Line up and rebiasing. HA8 8XD Phone: 01 -958 Replacement heads and brakes. Full trouble shooting, 5476 repair and test facilities. Other makes considered. MOBITRACK SOUND PROCESSES LTD. D.I. Box, passive, 20dB insertion, ground lift. 4 Latham Road, Twickenham, TW1 1BN, Middlesex Suit guitar, keyboards, etc. Ideal for Stage or 01 -891- 2815124 hours answering) Studio use. Only £19.50. Sound Advice (SS), 396 Godstone Road, Whyteleafe, Surrey. Tel: (08832) 5177. X FOR SALE TRADE COUNTY RECORDING SERVICE - For super quality Master Discs, Demo Discs and Pressings. Scully lathe with our latest MKW 80 Stereo Cutting System. ONE INCH recording tape, ex- masters now Also half speed cutting for that very special disc. deleted from record Dolby 'A', Dolby '8' and DBX noise reduction. MAGNETIC TAPE HEADS catalogue. Bulk erased. Ampex 406, Scotch 206, BASF SPR50 LH. £8 Manufactured to order for '/e ", /2'' ", 1" London Rd., Binfield, Bracknell, Barks and plus V.A.T. RG12 5BS 2 ". Please specify machine type. We also Action Sound, 01-428 3714. Tel. BRACKNELL (0344) 54935 offer a relapping service. BRANCH Et APPLEBY LTD. TASCAM Studio under £1,000. Comprises 4 Stonefield Way, Ruislip, Middx. HA4 OYL channel, 2 channel, mixer and DBX!! Erricks Tel. 01- 8641577 Bradford 309266 (Julian). X CASSETTE COPYING IN THE MIDLANDS Specialists in short run productions. Prices from 1p per minute, inc. cassette and library case. Label and inlay card printing, plus services and supplies for film. disc and AV PAIRS of Tannoy speakers `Autograph' wanted productions. by private collector, please write giving details Write or phone for rate card to: including serial numbers and price retailer Box AUDICORD RECORDS to 59 Mayfield Way, Barwell, Leics LE9 88L 872, c/o Studio Sound. D Tel 0455 -47298 SERVICES

NEW unused Otani fast copier DP4050 /OCF, six slaves to 10 1/2 in. reel tape £3,950 plus VAT. Revox B77 %a- track, new unused NAB adaptors rfiN CASSETTE DUPLICATING inc. L /case. Label and inlay card printing. Profession- £550 plus VAT. Attwell Audio, telephone 01 -785 al custom N de Das/aeu mT length 9666. B Quantity C1-10 C11-20 C21-30 C31-40 C41-50 C51-60 C61-70 C71-80 C81-90 C91-10oC101-110C111-120 blank cassettes 10-49 66p 68p 70p 74p 78p 82p 87p 95p 102p 112p 122p 132P C5 -10 20p 50 -99 63p 65p 67p 70p 73p 76p PAIR LOCKWOOD 83p 91p 99p 109p 119p 129p C15 -20 24p Majors £500, Ferrograph 100-149 62p 64p 66p 67p 69p 71p 78p 87p 94p 104p 114p 124p C30 -35 28p Pro 8 £1,000, both in good condition. Private use 150 -249 58p 60p 62p 83p 65p 67p 75p 84p 89p 99p 109p 119p C40 -50 31p 250 -499 56p 58p 60p Op 62p fully guaranteed. Also 10 into 4 ITA mixer £300. 63p 71p 79p 85p 95p 105p 115p C60 -65 35p 500 -999 54p 55p 56p 57p 0202 743394 B 58p 59p 66p 74p 82p 92p 102p 112p C70 -75 43p 1,000+ 48p 50p 52p 53p 55p 57p 63p 69p 79p 89p 99p 109p- C80 -9049p 10,000+ 47p 49p 51p 52p 54p 56p 62p 68p 78p 88p 98p 108p Library Professional custom length blank video cassettes supplied cases Sp LEEVERS -RICH one inch 8- track; Richardson ea. Prices RECORDING SUPPLIES, Green Acres, Northlands, Sibsey, Boston, Lincs. Tel. 0205 750595 ex. works, electronics. Transport needs slight attention, hence £1650. 01 -552 9947. B 79

www.americanradiohistory.com FOR SALE - TRADE FOR HIRE SITUATIONS WANTED

NEED SOMEONE SPECIAL? Young lady with FOR SALE Bruel Fr Kjaer over ten years experience in the music business Test Equipment seeks interesting and challenging job, permanent or temporary, in the industry. Background in studio management, bookings, AV production, All in mint condition and being sold at music publishing, record companies, artiste unrepeatable prices. management, client /press liaison, promotions, B Et K 2010 2Hz to 200kHz narrow -band RATES etc. experience you need to get the job done heterodyne analyser. FOR HIRE AT BUDGET -the LEXICON 224 Digital reverb and Prime Time properly. Full details and CV on request. Box B >* K 1902 distortion control unit. EVENTIDE HARMONIZERS ROLAND ECHOS no. 871, c/o Studio Sound. B Er K 2307 level recorder. and ANALYSER/ ,B Ft K 2209 impulse type sound level meter. DBX COMP /LIMITERS EQUALIZER studio gadgets Further details contact: Plus a whole range of Mike Jones, Phone Andy or Louise 01- 708 0483 GERMAN recording engineer, working since 15 Audio Consultant Engineer, or write for further details: years in the sound recording field, experienced in 31 Parkfield Avenue, SE17 3AF recording, outside broad- Eastbourne, Sussex. 10 Steedman Street, London all aspects of multitrack Tel. Eastbourne (0323152300 casting, radio, film and TV sound production and post -production, seeks permanent position PAUL Ft/RRtlN in Australia or New Zealand. Offers Box no. Spam] HIRE 874, c/o Studio Sound. B A selection from our price list: Per Wk. REVOX B77 LS or HS £21.00 QUALIFIED assistant recording engineer (22), STUDIO FACILITIES BOSE 802 Pair E30.00 experience two 24 -track London studios, seeks MXR HARMONISER + DISPLAY £36.00 European studio. Basic TEAC C3X CASSETTE (15.00 position in professional EVENTIDE 910 HARMONISER £60.00 knowledge of electronics, English, French, MICRON KIT clw SONY ECM50 £37.00 German. Box no. 873, c/o Studio Sound. B ATTWELL AUDIO for classical sound record- SOUNDCRAFT 800 MIXERS P.O.A. ings, location or studio, demonstration tapes, TEAL 3440 4 -TRACK £48.00 records or high quality cassette duplication. 124 Daily rate h weekly Lower Richmond Road, Putney, S.W.15. Tel. Unit 7B, Worton Hall Estate, Worton Road, 01 -785 9666. X Isleworth, Middlesex TW7 6ER.

FANFARE Records. Tape -disc pressings, Telephone: 01 -568 2313 demo's, masters, any quantity. Studio /mobile SITUATIONS VACANT Neumann disc cutter. S.A.E. brochure. 1 Broomfield Close, Rydes Hill, Guildford. Tel. 0483 61684. X SALES MANAGER

FOR SALE-PRIVATE Soundcraft, world leading manufacturers of mixing consoles and multi -track recorders seek an energetic, sales orientated SONY TC 766 -2 professional half -track recorder person (25 -40), with experience in professional audio to join with 4 -track playback, 15 and 7 % i.p.s., full logic. As new Tannoy Golden Duo Monitor in the company as Sales Manager. specified B/R cabinet. Offers 04426 8484. B Reporting to the Sales /Marketing Director, he /she will be responsible for the operation of the sales office and develop- DISC recording blanks at 1977 prices. 50 x 12in., ment of the UK market. 75 x 10in. in manufacturers sealed cartons. Carrog Lodge, Towyn Road, Abergele, Clwyd LL22 9AB. B Salary negotiable.

ITAM 806 8 -track 'hin. tape machine. Two years Please send CV to: careful use. Maintained by manufacturer to full spec. Offers around £1,500. Tel. (022 73) 4066. C Michael Newman, Personnel Manager.

SOUNDCRAFT WANTED ELECTRONICS LTD. Soundcraft 5 Great Sutton Street, TAPE duplication and cassette loading equip- EC1 V OBX ment, etc. wanted. Please send details to /979 THE CHALLENGER London Soundtrax, 18 Sycamore Grove, New Malden, Surrey, or ring 01 -942 2847. B 80 STUDIO SOUND, FEBRUARY 1982

www.americanradiohistory.com SITUATIONS VACANT SITUATIONS VACANT

SOUNDOUT Laboratories, Surbiton, Surrey, who manufacture a range of professional sound equipment are looking for an experienced test engineer who has had extensive experience of testing amplifiers, mixers and other audio appar- atus. The position.entails total responsibility for ASSISTANT final product approval. Remuneration up to £6,500 and a total package including BUPA, 18 days annual holiday and sickness benefit. Call Todd Wells, Managing Director on 01 -399 3392. AUDIO MANAGER B NORTHERN IRELAND Salary between £9,251 and £11,504 The Audio Unit in Northern Ireland provides the sound operations for ABC 50}b both radio and television programmes produced at our Studios and at Outside Broadcast locations. The Unit is headed by the Audio 7931$1 gfnníra er,sary Manager, who will rely on the Assistant to support him in planning and coordinating major events, the development of the Unit and deputise for him in his absence. He or she will also act as the Line Manager for the Unit, will assist in the preparation and implementa- A fair deal tion of training programmes, and play a part in current and future radio and television developments by advising on staffing and equipment implications. for Candidates should have substantial practical experience of sound operations, including large radio and television productions, where an our advertisers appreciation of programme priorities and an awareness of current No guesses, no wishful production techniques is very important. A current driving licence is thinking - our Circulation also essential. figures are independently Applicants should also have the ability to become conversant rapidly audited to the strict standards with the conditions of service of staff working in the audio unit. required by the Audit Bureau The Assistant Audio Manager is based in Belfast but will be required of Circulations. to travel throughout the U.K. Please write to: The Engineering Recruitment Officer, BBC, We're proud of our Broadcasting House, London WIA IAA, quoting ref. 8LE.4047 /SS. membership of ABC - especially in this its Golden 0 Jubilee Year.

For Further INFORMATION Experienced on Sound Technician STUDIO

ANGLIA TELEVISION LIMITED requires an experienced Sound Technician for studio and O.B:s. Point of entry to ACTT salary SOUND scale up to Substantive Grade according to qualifications and experience. Applications in writing to Peter Meier, Personnel Officer, contact Anglia Television Limited, Anglia House, Norwich NR13JG quoting reference 180 /AC within two weeks of the date of this publication. PHIL GUY ANGLIA TELEVISION on 01 -686 2599

www.americanradiohistory.com INDEX TO DISPLAY ADVERTISERS

A H o AKG 59 Harrison OBC Otari Electric Co. Ltd. Alice Stancoil 37 Hayden Labs 12 Aphex Systems Ltd. 29 P Audio Developments 59 Precision Audio 63 Protex Fasteners Ltd 10 Audio Kinetics 14 I.T.A 9, 57 Audio Systems International 77 Audix Ltd 6 R K Rank Strand Sound 23 Key Board Hire 11 REW 69 B Klark Teknik Research Ltd. 47 Rycote 38 Bang & Olufsen 41 Bauch, F. W. O. Ltd. 13, 15, 17, 65, OBC L S Larking, Don, Audio 36 Scenic Sounds 25, 51 Leevers Shure Electronics 8 C Rich Equipment Ltd. 45 Level) Soundcraft Electronics IFC Canadian Instruments & Electronics 40 Electronics 77 Lexicon Inc 65 Sound Technology 63 77 Lindos Electronics 14 Sowter, E. A. Ltd. Stantron 41 E Studer 15 Eardley Electronics 67 M Studio Equipment Services 4 Electrovoice 5 MBI 33 Surrey Electronics 32 EMT 13 MCI Inc IBC 4 5 43 MCI Ltd. 49 Syco Systems Electronics BV 18 Melkuist 73 Synton F Mosses & Mitchell 75 T Feldon Audio 27 Music Laboratory 7 Trad Sales & Services 31 Formula Sound Ltd 41 Mustang Communications IO Trident Audio Developments Ltd. 16 Future Film Developments Ltd. 6 MXR innovations 35 Turnkey 19, 21, 73

G N w Gresham Wood IO New England Digital 11 Wayne Kerr Radford Ltd. 67 Groves, Alan, Builders 39 Neumann 17 Westrex Co. Ltd. 71

CLASSIFIED ADVERTISEMENTS ORDER FORM I ï Please use this coupon for your private sales and wants. Rates 35p per word. Minimum £8.75. Box Nos. £1.50 extra. To: Studio Sound, Classified Advertisements Dept., Link House, Dingwall Avenue, Croydon CR9 2TA. Please publish the advertisement below for insertion /s under the heading

Name Cheque/ P.O. enclosed £ Is a Box No. required Yes /No. If no, please include Address remittance to cover name and address and /or Tel. No.

Please write in block capitals.

Studio Sound is available without charge to qualified readers: these are directors, managers, executives and key personnel actively engaged in sound recording, broadcasting and cinematograph industries in any part of the world. The Publisher reserves the right to refuse applications considered inappropriate and restrict the number of free copies sent to any one company or organisation. Non -qualifying readers can buy Studio Sound at an annual subscription of £16.50. All enquiries to: Subscription Department, Link House Publications PLC, Link House, Dingwall Avenue, Croydon CR9 2TA, Great Britain. Phone: 01-686 2599. Published by Link House Magazines (Croydon) Limited on behalf of the proprietors, Link House Publications PLC, Robert Rogers House, New Orchard,

Poole, Dorset BH 15 1 LU and printed by Arthurs Press Ltd., Woodchester, Stroud, Glos. GL5 5PB. www.americanradiohistory.com lisaUM MOiIMP

!i bit- sI!

Straightforward. That's the kind of I WANT PROFESSIONALISM, person Donny Osmonc is, and that's the quality he demards in recording equipment. He gets it with ris fully NOT JUST BELLS AND equipped MCI recording studio located in the audio /video Osmond Entertainment WHISTLES. Center in Orem, Utah. Sensible design. Clean sound. And the kind of versatility no other recording equipment at any price can beat. THAT'S WHY I MCI. Not always the most expensive, DEMAND MCI. but always the best.

1400 W. Commercial Boulevard, Fort Lauderdale, Florida 33309 USA. Telephone: (305) 491.0825. Telex: 514362 MCI FTL. T W A6001-0006 -81

www.americanradiohistory.com Harrison Harl i5011

Facilities: METER SEEECI AB CD The MR -3 is supplied - complete with integral The patchbay and varying PE AK

frame sizes to NMI LEST ,t accommodate up to 56 OSC au II to MR-3. input channels. Harrison moo -fit- H - Each input module has a 21. PEX full 24 -track output -assign 11611, High on Features, matrix and three bands of

parametric E /q, with a BI high pass filter and optional variable 'Q' on Low on Price. each band. You can never afford to buy cheaply.

IIIIIIIIIIIIIIIIIII SLATE /OSC ASSIGN What you must do these days is buy Pt 1 2 economically. 1,'T SELECT Recognising this, Harrison has 11 111 MR -3 music desk. High 11= developed the I I on impressive features, but not on cost, -.f I I I value .? TAPE the MR -3 represents excellent and In addition, each module invest in offers six auxiliary sends I[ a unique opportunity to and a direct assign button I - SENDS recording. -0 Harrison performance. for multitrack I IA I (3. II words the -3 -lM I In other MR guarantees CONSOLE STATUS maximum efficiency in 24 -track // '.o" RMIXi, recording. RMM -I Mix The Harrison MR -3. Underpriced it I- -I II _MM_ MONO may be, undermade it's not. -EPx -I , II To find out more about the Harrison A B CRM STl1 AUTOMATION MR -3 contact F.W.O. BAUCH at the Major console status STATUS SPEAKER MUTE A B address below. changes are effected with 1 I one -button ease. Six 1-.Ro Harrison modes of operation are F --1U .17NI 014 available including two ICR new statuses for 4UX SMPKR broadcast and video post production.

OMMUN1CAT ION MIX MONITOR The standard VCA faders enable the operator to establish VCA groups when recording and mixing. The console is prepared for rapid installation of three 5- - proven automation 10- - systems: Melkuist, Allison + I 15- - and Harrison's own Auto -set. 20- - 25- - 30- - 30- - 35- - 31ir4 40- - 45- - . 60-- FWD Bauch Limited 49 Theobald Street. Boreham Wood Hertforwhlre WD6 4RZ Telephone 01-953 0091, Telex 27502