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Journal of the Odio Sodé

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Journal of the Odio Sodé journal of the odio Sodé REVIEWED IN THIS ISSUE The Heathkit SB-104 all-solid-state hf bands Photo I. Front vie w transceiver Photo 3. Illustrating Photo 2. Interior vie w use of outrigger board RADIO COMMUNICATION July 1977 AMATEUR ELECTRONICS UK M AIN ATLAS SOLE dk--î PLUS AGENT R A DI O IN C. AGENT ELECTR ONICS YOUR BEST BUY FOR YAESU MUSEN ! AS DIRECT IMPORTERS W E OFFER YAESU YOU ... 1. KEENEST PRICES 2. LARGEST RANGE 3. HIGHEST STOCKS FT-101E 4. TOP AFTER-SALES SERVICE FT-221R 5. BEST DEMONSTRATION FRG-7 FACILITIES FT-223 AN D MU C H M ORE —EX STOC K! HO W TO REACH US (EASY PRIVATE PARKING ON OUR 70 ft FORECOURT) FROM SOUTH AND EAST. We are located approximately two miles from Junction 5 of the M6 from which follow signposts to Birmingham. Within k mile turn right at Clock Garage and proceed towards city. After one mile look for traffic lights at Fox & Goosu and immediately over the lights take minor left fork into Alum Rock Road. We are located one mile from this point. FROM NORTH. Leave M6 at Junction 6 (Spaghetti) and follow left fork down to traffic island beneath motorway complex. Take third turning off to Lichfield. One mile further on follow A4040 to the right and within 100 yards vare again to the right, approximately one mile further on brings you to the Fox & Goose. Turn right and see preceding directions. FROM THE WEST AND SOUTH/WEST. Follow M5 then M6 to Spaghetti Junction (see above). Alternatively, leave M5 at Junction 4 or 3 and proceed to inner ring road. Turn South on ring road and leave on A47 (East). We are located three miles from this point. HOURS: 9.30-5.30 continuous including Saturdays—Early closing Wednesday 1pm, or, if you can't make It, we will gladly ship by Securicor at no extra cost. -4SensationalATLAS-210/215X NO W AT THE NEW LOW PRICE OF £395 VAT £2.50 for 25 pence! 25 pence brings the latest Yaesu catalogue with our Credit Voucher for £2.50 against eventual purchase. A couple of stamps brings the Atlas leaflet or our used equip ment list. BRANCH: AMATEUR ELECTRONICS UK- COASTAL, CLIFTON VILLE, KEN T. KEN McINNES, G3FTE, THAN ET (0843) 291297 BRANCH AMATEUR ELECTRONICS UK SCOTLAN D 287 MAIN STREET, WISHA W, LANARKSHIRE, GORDON McCALLU M, GM3UCI, TEL: WISHA W 71382. (BR A N C HE S AT YO U R SER VICE DURIN G NO R M AL BU SINES S HOU R S) AGENT: W ALES & WEST—ROSS CLARE, GW3N WS, CAERLEON 422232 508-514 ALU M ROCK ROAD 1497 021-327 BIR MING H A M 8 Telex337045 6313 EDITORIAL STAFF ISSN 0033-7110 Editor A. W. Hutchinson Book Editor R. J. Eckersley, G4FTJ radio Editorial assistant V. Wyman communication Draughtsman D. E. Cole Editorial panel July 1977 J. P. Hawker, G3VA Volume 53 No7 R. F. Stevens, G2BVN CONTENTS Advertising representative 515 What amateur radio is—Roger Sherland, G4EHE C. C. LIndsay 516 QTC RSGB NEWS BULLETIN SERVICE 518 The DSB1 Mk2. A simple sideband transmitter for the The RSGB news bulletin, callsign GB2RS, Is broadcast beginner—E. Elsley, G3YUQ every Sunday morning on tif and vhf, giving almost complete coverage of the British Isles. Its main purpose is to provide an outlet for amateur radio news items and 522 New product—Tester 50k announcements which, by virtue of their topicality or urgency, cannot wait for the next issue of Radio Com- 523 Equipment review—The Heathkit SB-104 all-solid-state munication. The bulletin Is prepared early on Thursday morning, hf bands transceiver—G. L. Mills, BSc (Eng) (ions), and news Items, marked "GB2RS news" should reach CEng, MIEE, M1ERE, G3EDM RSGB HQ by first post that day (telephoned items can also be accepted unt1110am). No guarantee can be given of Inclusion in part or whole of any Item submitted and, 529 Book reviews—Radio, TV & Audio Technical Reference once broadcast, items are not usually repeated. Book. The International VHF-FM Guide SCHEDULE 530 Technical Topics—Pat Hawker, G3VA Time MHz Location and coverage (hf) or beam heading (vhf) of station 536 4-2-70—Graham Knight, GM8FFX 0930 3.65 G2MI, Bromley, Kent (SE England) 1000 3-65 G8ML, Cheltenham (SW England) 144.50 GM3UAG, ElIon, Aberdeenshire 539 Oscar news (NN W) 144-50 G8GGK, Croydon, Surrey (NE) 1015 3-65 Gl3GAL. Belfast (N Ireland) 540 Microwaves— Dain Evans, G3RPE 144-50 GI3TLT, Bangor, Co Down (N) 1030 3-65 G2CVV, Derby (N Midlands) 542 The month on the air—John Allaway, G3FK M 144.50 GM3UAG, ElIon, Aberdeenshire (SW) 144-50 G3P WJ, Brierley Hill (NW) 545 Propagation predictions. HF propagation study 1045 144.50 G8CDP, Middlesbrough (NW) 144-50 G8GGK, Croydon. Surrey (SW) 546 Your opinion. Obituaries 144.50 G3SMT, Stockport (NN W) 1100 3-65 G5VO, Bridlington (NE England) 1115 3.65 G3LEQ, Knutsford (NW England) 547 Contest news 1130 3-65 GM3TC W, Wishaw, Lanarkshire (S Scotland) 1145 3.65 GM3HGA, Aberdeen (NE Scotland) 548 Special event stations. Looking ahead Mobile rallies calendar. Contests calendar An rtty news bulletin, calisign GB2ATG, Is also trans- mitted every Sunday at 1200 and 1900 on 3.590MHz and at 1230 and 1245 on 144-6M1-Ix. This bulletin carries items of 549 Club news interest to rtty enthusiasts. 554 Members' Ads Radio Communication is published by The Radio Society of Great Britain as its official journal on the first Thursday of each month and is sent free and post paid to all members of the Society 20,432 copies Contributions and all correspondence concerning the content of Radio Communication should be per issue addressed to: The Editor, Radio Communication, 35 Doughty Street, London WC1N 2AE. Tel ABC average 01-837 8688. (Circulation queries should be addressed to: The Subscriptions Department, RSGB). w pm p AVM, circulation Closing date for contributions unless otherwise notified: 4th of month preceding month of C. N.41.9 . in 1976 publication. © RADIO SOCIETY OF Advertising, other than Me mbers' Ads, should be sent to the above address marked for GREAT BRITAIN 1977 the attention of Mr C. C. Lindsay. Tel 01488 5839 (ADVERTISING ONLY). \e/ YAESU MUSEN Yu MOBILE/BASE HF TRANSCEIVER THE FTIOIE Yaesu's top to ten transceiver whose design, reliability and construction (quality and techniques (modular plug- in boards etc.)) set new standards thus establishing the '101 as a world beater, w th over 200,000 now In use. A complete device-packed hybrid station, offering FT-101E (EE-E X) "built ins" that either are not available elsewhere or come as costly extras. FT 101 E FEATURES 160-10 metre inclusive coverage Semi break in with sidetone Fully adjustable carrier level Multi mode, USB, LSB, CW, AM 3 models E, EE and EX Heater conservation/low power links Mains 234V and 12V DC Rs on MSF (10MHz) and CB Clarifier with Indicator LED 11-(133") 6' > 13 .1 30 lbs Front Panel microphone gain SSB and CW filter bandwidths Silky smooth precision VFO drive Indicator LED for VFO operation Valve PA and driver tube Readout to better than lkHz Eight Pole sharp sided filter 100/25kHz crystal calibrator 2 Fix channels per band segment RF speech processor (In IF) Switchable adjustable noise blanker FT101 E SPECIFICATIONS Frequency range Sensitivity Input power 160-10 metres transceive -; for 10dB N — SiN (4) 14MHz >260W PIP A31 M.S.F. and CB receive >180W DC Al (50%:duly) Selectivity >80W A3 Modes SSB 2-4Hz at 6dB (1-67:SF) USB, LSB, CW, AM AM* as SSB Audio response Frequency stability CW*61)0Hz at 6dB (2:1SF) 0.35-2-7Hz ±3dB FSK as CW >1001-IzaH (A.W.U.) Carrier suppression <100Hz for 10% line change Spurious responses < —50 dB Backlash Image < —50dB Sideband suppression 50Hz or better Internal spurious <1pV > —50dEl Antenna impedance Audio output Spurious radiation 50 ohms, nominal 3W (int. or ext. speaker) > —40dB Power requirements 234V AC 350W Audio distortion Dimensions 13-5V DC 0-515-0;20A <10% at 3W output 11- (131) x 6 x 13 " & nibs AT YAESU MUSEN :A MATEUR RADIO EQUIP MEN T IS NOT A SIDELINE, BUT THE ONLY BUSINESS. OVER 130 LICENSED AMATEURS PROUDLY PRODU CE THE MOST DIVERSE AVAILABLE AMATEUR PRODUCT LINE SSE, CW, AM, FM OR FSK FOR MOBILE, PORTABLE OR BASE USE. W RITE TO ONE OF OUR DISTRIBUTORS FOR A FREE CATALOGUE. 498 RADIO COMMUNICATION July 1917 YAESU MUSEN MOBILE/BASE VHF TRANSCEIVER r THE FT22I R YAESU's state of the art, fully modular, plug in board, multimode, 2 metre transceiver renders over the board "rats' nest" wiring obsolete. A 134MHz, VCO, automatic varicap tuning of transmitter and receiver, gives you an exceedingly clean signal, and a sensitive receiver having outstanding strong signal handling capabilities. FT221R FT22 I R FEATURES 144-148MHz Inclusive coverage Semi break-in with sidetone 600kHz and repeat shifts Multi mode AM-FM-USB-LSEI-C W Unique automatic tone burst 'S/centre zero/output meter 234V AC or 12V DC working P.T.T. microphone supplied Clarifier (IRT also RT i TT) 114' (14') x 5- x 11}", and 22Ib Front panel adjustable VOX 2-4kHz SSB 12kHz FM bandwidth Dual speed smooth VFO drive Front panel microphone gain Adjustable sensitive squelch Readout to better than 1kHz A LC external phono socket 100kHz crystal calibrator 44 fix channels (4 x 11) (2MHz) 70W dissipation PA device Switchable noise blanker FT22 I R SPECIFICATIONS Frequency range Sensitivity Output power 144-149MHz 0.5mV for 10dB SiN at 145MHz >14 W PEP A3i 600kHz + 1 other shift >10 W F3, Al Selectivity >2.5W A3 Modes SSB 2.4kHz at 6dB (1.7:1 SF USB, LSB, CW, AM AM as SSB Audio response Frequency stability FM 12kHz at 6dB (2:1 SF) 0-3-2-7kHz ±3dB CW as SSB >100Hz 1;FI (A.W.U).
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