Radio Bygones Indexes
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Test Data for Electron Tube Test Sets Tv-7/U, Tv-7A/U, Tv-7B/U, and Tv-7D/U
NAVWEPS 16-45-637 TB 11-6625-274-12/1 DEPARTMENT OF THE ARMY TECHNICAL BULLETIN TEST DATA FOR ELECTRON TUBE TEST SETS TV-7/U, TV-7A/U, TV-7B/U, AND TV-7D/U This copy is a reprint which includes current pages from Changes 3. HEADQUARTERS, DEPARTMENT OF THE ARMY JANUARY 1962 *TB 11-6625-274-12/1 TWENIGAL BUMIN ME ADQUARTERS, DEPARTMENT OF THE ARMY No. 11-6826-274-12/1 WASHtNGTUN 26, D. C.,17Januarui96S TEST DATA FOR ELECTRON TUBE TEST SETS TV-7/U, TV-7A/U, TV-7B/U, AND TV-7 D/U 1. Operation. The following instructions are keyed to the table of teat data given In paragraph & For comule@ operating inatruetions see TM 11-6625-274-12, Operator’s nnd Organizational Maintena.nee Manual, Test Sets, Electron Tube TV-7/U, TV-7 A/IJ, TV-7B/U, and TV-7D/U. & Turn the POWER switch to the ON po.cition. b. Press push button l-LINE ADJ and hold it down. S1OWIY rotata the LINE AD- JUST control knob untii the pointer of the meter rcata over the LINE TEST mark. This adjustment is not required for all tubes (refer to Notntiom column). c. Locate the type number of the tube to be taatcd (par. 2) under the column heading Tube twe. d. Refer ta the Notatiene column for $pecinl information pertaining to apcciflc typcc of tubcc. 8. Set the lrILAM ENT VOLTAGE owitch et the voltage shown under the heading Fil. /. Set the selector awitehes as indicated under tbe column headed Setectoru in the fol-” Jowfng order: FILAMENT (left), FILAMENT (right). -
LIGHTHOUSE the Magazine of the Eddystone Users Group
LIGHTHOUSE The magazine of the Eddystone Users Group NDEX Issues 1-96 combined FULL INDEX Combination of Anthony Richards Indexes in searchable pdf format Alan Ainslie April 2009 INDEX TO EDDYSTONE MODELS issue page 31A 29 featured receiver JZ * 1 Q 11 manual L y 40A brief description J mains psu danger "25 narrow band filters, query as to 37 24 brief description ' z 160 services equivalent of ECR 21 9 214/215 brief description -24 9 3 g 25 358 advert, reprint (1942) 3 7 Australia, used in -29 29 condensers, paper 37 8 crystal, dud 39 20 dates when current 23 17 EB34 diode valves, replacement of with 1N914 diodes 42 20 electric shock 4 5 filters, crystal -42 20 Gulf War, monitoring of 8 1 mechanical problems 40 18 motorboating 7 5 Norway, in use, ex WW II trawler 8 16 r output valves 3 5 23 overhaul 10 17 10 22 H rescued from burial (Dave Langdon) 21 10 ! Royal Navy designation B34 42 10 S meter, sticking 12 14 m valves, ECC82 replacing EF39 25 15 I! vnrwkfVrkilc cons————————————————————————— _ ————— 14ih 7/ : _oi o ——————— —- - Z. 1 7 400 P brief description 18 10 ! 94. i o 9Q 11 -^ ——....— — ..—.——— ...........31 22 I valves, ECC82 replacing EF39 -25 15 440 brief description 12 24 -if. 7 r issue page 450 504 featured receiver -21 3 acquisition by member 16 3 advert (N.Z.) 18 5 a.f. gain, fault 10 14 alignment frequencies 4 3 a.v.c.,fault 10 14 brief description 29 11 drifting, curing 40 5 rejuvenation of- 32 14 3 9 \ 4 S meter, zeroing problems 42 17 valves, ECC82 replacing EF39 -25 15 cccra n c ii . -
1999-2017 INDEX This Index Covers Tube Collector Through August 2017, the TCA "Data Cache" DVD- ROM Set, and the TCA Special Publications: No
1999-2017 INDEX This index covers Tube Collector through August 2017, the TCA "Data Cache" DVD- ROM set, and the TCA Special Publications: No. 1 Manhattan College Vacuum Tube Museum - List of Displays .........................1999 No. 2 Triodes in Radar: The Early VHF Era ...............................................................2000 No. 3 Auction Results ....................................................................................................2001 No. 4 A Tribute to George Clark, with audio CD ........................................................2002 No. 5 J. B. Johnson and the 224A CRT.........................................................................2003 No. 6 McCandless and the Audion, with audio CD......................................................2003 No. 7 AWA Tube Collector Group Fact Sheet, Vols. 1-6 ...........................................2004 No. 8 Vacuum Tubes in Telephone Work.....................................................................2004 No. 9 Origins of the Vacuum Tube, with audio CD.....................................................2005 No. 10 Early Tube Development at GE...........................................................................2005 No. 11 Thermionic Miscellany.........................................................................................2006 No. 12 RCA Master Tube Sales Plan, 1950....................................................................2006 No. 13 GE Tungar Bulb Data Manual................................................................. -
Boletin CX 155.Pdf
CX... BOLETIN del RADIO CLUB URUGUAYO Fundado el 23 de Agosto de 1933 Simón Bolívar 1195 – Tel-Fax: 598 2 708 7879 11300 Montevideo – Uruguay TEstación Oficial CX1AAT e-mail: [email protected] # direccion pagina web: HTUwww.cx1aa.netUTH Miembro de IARU Boletín correspondiente al sábado 19 de Abril de 2008 – Año IV N° 155 En el año de su 75º aniversario. Parte de este Boletín se irradia a través de CX1AA en la frecuencia de 7088/7085 KHz , los días sábado en el horario de 11:30 hora CX. Éste boletín se envía a todos los socios y amigosT TTque lo solicitenT en los siguientes días de la semana entrante, quienes por alguna causa no lo reciban le agradecemos que nos hagan llegar su e-mail a fin de incluirlo en la lista de distribución. Agradecemos especialmente a todos los oyentes y amigos que nos acompañan con su presencia en la frecuencia. Por otro lado, estimaremos la participación de quienes puedan contribuir con sugerencias que podamos llevar a cabo, envío de artículos para publicar, comentarios, etc. Se autoriza la reproducción de artículos siempre que se mantengan inalterados, para ser utilizados solo con fines educativos o informativos. Los autores son los únicos responsables de sus artículos. TEl Radio Club Uruguayo se encuentra abierto los días martes y jueves en el horario de 16:00 a 21:00 horas Los días martes sesiona la Comisión Directiva, los socios y amigos que nos visitan disfrutan de charlas, anécdotas, lectura de revistas y libros de nuestra biblioteca. Los días jueves es un día de reunión general y de encuentro. -
Factory Radio Communications
0 rf indoor collllllunicafions ___________ Factory Radio Communications Noise and propagation measurements reveal/imitations for UHF/microwave i'ndoor radio communication systems By Theodore S. Rappaport Virginia Polytechnic Institute and State University A glimpse into a typical factory re· any type of tether will require a radio In Japan, spectrum has been set aside veals a high degree of automation has system for control. Optical systems are for 300 mW, 4800 bps indoor radio .entered into the work place. Computer viable, but become inoperative when systems operating in the 400 MHz and driven automated test benches, wired obstructed. Furthermore, radio systems 2450 MHz bands (4). guided robots and PC-controlled drill will be us~ful for quickly and cheaply Accurate characterization of the oper presses are a few examples of the connecting often moved manufacturing ating channel is a mandatory prerequi proliferation of computer technology equipment and computer terminals. Ra site for the development of reliable and automation in manufacturing. The dio will also accommodate reconfig wideband indoor radio systems. Radio boom in automation has created a need urable voice/data communications for channel propagation data from factory for reliable real-time communications in other facets of factory and office building buildings have been· made available for factories. In 1985, the Manufacturing operation and may eventually be used the first time through a research pro Automation Protocol (MAP) networking in homes and offices to provide univer gram sponsored by NSF and Purdue standard was established by manufac- sal digital portable communications (1 ). University. As shown here, it is not . turing leaders to encourage commer Presently, communications· between environmental noise, but rather multi cialization of high data rate communica computers and automated machines are path propagation that limits the capacity tions hardware for use in computer conducted almost exclusively over ca of a radio link. -
Detecting and Locating Electronic Devices Using Their Unintended Electromagnetic Emissions
Scholars' Mine Doctoral Dissertations Student Theses and Dissertations Summer 2013 Detecting and locating electronic devices using their unintended electromagnetic emissions Colin Stagner Follow this and additional works at: https://scholarsmine.mst.edu/doctoral_dissertations Part of the Electrical and Computer Engineering Commons Department: Electrical and Computer Engineering Recommended Citation Stagner, Colin, "Detecting and locating electronic devices using their unintended electromagnetic emissions" (2013). Doctoral Dissertations. 2152. https://scholarsmine.mst.edu/doctoral_dissertations/2152 This thesis is brought to you by Scholars' Mine, a service of the Missouri S&T Library and Learning Resources. This work is protected by U. S. Copyright Law. Unauthorized use including reproduction for redistribution requires the permission of the copyright holder. For more information, please contact [email protected]. DETECTING AND LOCATING ELECTRONIC DEVICES USING THEIR UNINTENDED ELECTROMAGNETIC EMISSIONS by COLIN BLAKE STAGNER A DISSERTATION Presented to the Faculty of the Graduate School of the MISSOURI UNIVERSITY OF SCIENCE AND TECHNOLOGY In Partial Fulfillment of the Requirements for the Degree DOCTOR OF PHILOSOPHY in ELECTRICAL & COMPUTER ENGINEERING 2013 Approved by Dr. Steve Grant, Advisor Dr. Daryl Beetner Dr. Kurt Kosbar Dr. Reza Zoughi Dr. Bruce McMillin Copyright 2013 Colin Blake Stagner All Rights Reserved iii ABSTRACT Electronically-initiated explosives can have unintended electromagnetic emis- sions which propagate through walls and sealed containers. These emissions, if prop- erly characterized, enable the prompt and accurate detection of explosive threats. The following dissertation develops and evaluates techniques for detecting and locat- ing common electronic initiators. The unintended emissions of radio receivers and microcontrollers are analyzed. These emissions are low-power radio signals that result from the device's normal operation. -
ARGUS, the VCR97 CRT, the PENTODE THAT WON the WAR and “MY ARGUS”
PRACTICAL TELEVISION MAGAZINE'S ARGUS, THE VCR97 CRT, THE PENTODE THAT WON THE WAR and “MY ARGUS”. Dr. Hugo Holden, Oct. 2016. (Updated Nov.2016- Argus Filters & case page 37. Change to sync Sep value, pg 14) INTRODUCTION: Firstly some photos of “My Argus”. This name, throughout this article, refers to my unique version of the Argus build your own Television project from Practical Television (P.T.) magazine 1952. My Argus has a different mechanical construction philosophy and altered electrical design which is described in this article: SCREEN IMAGES: The Argus employed the VCR97 CRT (Radar Cathode Ray Tube). Just how good is a VCR97 CRT at producing a 405 line television picture? The answer to this question depends on the actual VCR97 you have and the performance of the set’s vision amplifier and video output stage. Some VCR97’s, due to an anomaly in their electron gun and deflection plate construction, cannot deflect a full screen image. Other VCR97’s now have low emission and brightness and while being ok for a single line scope or radar display, are poor for displaying a TV scanning raster. After sorting through a good number of them I selected the better performing tube. A number of screen images are shown below. The screen image photographs below show that the horizontal and vertical scanning linearity is not perfect. It is a little stretched at the start of the horizontal scan and compressed a little at the end vertical scan. This turned out to have a different reason in the line and frame oscillator/deflection circuits and was subsequently remedied with simple modifications described later in this article. -
LIGHTHOUSE the Magazine of the Eddystone Users Group
LIGHTHOUSE The magazine of the Eddystone Users Group NDEX Issues 1-96 combined GENERAL SECTION Combination of Anthony Richards Indexes in searchable pdf format Alan Ainslie April 2009 GENERAL INDEX 1 issue page 1 AC / DC models operating on 120v 7 6 ZZZZZI 36 23 hum reducing, modification 18 20 isolation transformers 34 28 isolation washers (front panel) 34 2 Acceptor Unit Dl 1/R234 36 3 Advertisements, factory see also model index and Dealers, Eddystone see also model index & specific items in general index aerial 34 25 C0ils 8 10a components & factory 12 27 components -25 20 components (1934) 32 24 components (1939) -33 12 34 3 components (1932) 39 5 dials & drives -37 7 diecast boxes 14 5 racks, steel, transmitting 35 22 receivers (1968) 32 26 short wave components 37 19 3 7 25 38 27 40 6 40 13 Aerials active antenna 9 2 17 1 .26 19 attenuator -----------------------———-————————— i j i j LrI PTJR9 J j oz ————————— ji17 Ji11 3 g 30 attenuator pads & formula -28 23 made outside Eddystone 39 33 tunable, description 30 25 obtaining FET for above 32 13 VdlVC ijrJJC ——————————— j£. i / attenuator ——————-—-—————— ————————. \ j, j balun, magnetic -24 15 beam, 2 metre, Eddystone 11 14 Beverage -21 15 broadband, for SWLing 36 10 choosing type -------————————————-————*^j j 7 ^ 9^ -37 90 co - ax see Co - ax comparison of different types, receiving 9 2 in 1 df Q 1 1 dipole, folded -29 2 74 Ofi issue page r Aerials cont'd dipoles, v.h.f. 10 8 dipoles, wide band 1 ° 4 & 6 / . -
Audio Production Techniques (206) Unit 1
Audio Production Techniques (206) Unit 1 Characteristics of Audio Medium Digital audio is technology that can be used to record, store, generate, manipulate, and reproduce sound using audio signals that have been encoded in digital form. Following significant advances in digital audio technology during the 1970s, it gradually replaced analog audio technology in many areas of sound production, sound recording (tape systems were replaced with digital recording systems), sound engineering and telecommunications in the 1990s and 2000s. A microphone converts sound (a singer's voice or the sound of an instrument playing) to an analog electrical signal, then an analog-to-digital converter (ADC)—typically using pulse-code modulation—converts the analog signal into a digital signal. This digital signal can then be recorded, edited and modified using digital audio tools. When the sound engineer wishes to listen to the recording on headphones or loudspeakers (or when a consumer wishes to listen to a digital sound file of a song), a digital-to-analog converter performs the reverse process, converting a digital signal back into an analog signal, which analog circuits amplify and send to aloudspeaker. Digital audio systems may include compression, storage, processing and transmission components. Conversion to a digital format allows convenient manipulation, storage, transmission and retrieval of an audio signal. Unlike analog audio, in which making copies of a recording leads to degradation of the signal quality, when using digital audio, an infinite number of copies can be made without any degradation of signal quality. Development and expansion of radio network in India FM broadcasting began on 23 July 1977 in Chennai, then Madras, and was expanded during the 1990s, nearly 50 years after it mushroomed in the US.[1] In the mid-nineties, when India first experimented with private FM broadcasts, the small tourist destination ofGoa was the fifth place in this country of one billion where private players got FM slots. -
WIRELESS and EMPIRE AMBITION Wireless Telegraphy/Telephony And
WIRELESS AND EMPIRE AMBITION Wireless telegraphy/telephony and radio broadcasting in the British Solomon Islands Protectorate, South-West Pacific (1914-1947): political, social and developmental perspectives Martin Lindsay Hadlow Master of Arts in Mass Communications, University of Leicester, 2003 Honorary Doctorate, Kazakh State National University (named after Al-Farabi), 1997 A thesis submitted for the degree of Doctor of Philosophy at The University of Queensland in 2016 School of Communication and Arts Abstract This thesis explores the establishment of wireless technology (telegraphy, telephony and broadcasting) in the British Solomon Islands Protectorate (BSIP), South-West Pacific and analyses its application as a political, social and cultural tool during the colonial years spanning the first half of the 20th century. While wireless seemed a ready-made technology for the Pacific, given its capability as a medium to transmit and receive signals instantly across vast expanses of ocean, the colonial civil servants of Britain’s Fiji-based regional headquarters, the Western Pacific High Commission (WPHC) in Suva, were slow to understand its strategic value. Conservative attitudes to governance, combined with a confidence born of Imperial rule, not to mention bureaucratic inertia and an almost complete lack of understanding of the new medium by a reluctant administration, aligned to cause obfuscation, delay and frustration. In the British Solomon Islands Protectorate, one of the most geographically remote ‘fragments of Empire’, pressures from the commercial sector (primarily planters and traders), the religious community (mission stations in remote locations), keen amateur experimenters (expatriate businessmen), wireless sales companies (Marconi and AWA Ltd.), not to mention the declaration of World War I itself, all intervened to bring about change to the stultified regulatory environment then pertaining and to ensure the introduction of wireless technology in its multitude of iterations. -
HF+50 Mhz ALL MODE COMMUNICATIONS RECEIVER Expanded Frequency Coverage Imize Image and Spurious Responses for DSP Capabilities Better Signal fidelity
HF+50 MHz ALL MODE COMMUNICATIONS RECEIVER Expanded frequency coverage imize image and spurious responses for DSP capabilities better signal fidelity. The IC-R75 covers a frequency range DSP (Digital Signal Processor) filtering in the *1 Not guaranteed. that’s wider than other HF receivers; AF stage is available with the optional UT- *2 Not guaranteed; When PREAMP OFF; CW 0.03–60.000000 MHz*. This wide fre- narrow 500 Hz bandwidth; 100 kHz channel 106 DSP UNIT*. The DSP provides the fol- quency coverage allows you to listen to a spacing lowing functions: variety of communications including ma- * Already installed with some versions. rine communications, amateur radio, short • Dynamic range characteristics example Noise reduction: wave radio broadcasts and more. Intercept points Measuring condition Pulls desired AF signals from noise. Out- *Guaranteed 0.1–29.99 MHz and 50–54 MHz only 140 Frequency : 14.15 MHz (100 kHz separation) Mode : CW 120 Bandwidth : 500 Hz (both 2nd and 3rd IF) standing S/N ratio is achieved, providing PREAMP, ATT : OFF 100 clean audio in SSB, AM and FM. Pull weak 80 Preamp1 ON High stability receiver circuit 60 signals right out of the noise. Signal output Preamp OFF 40 Receiver output level (dB) output level Receiver Icom’s latest wide band technology pro- 3rd IMD 20 S+N = 3 dB N output Comparison of receive signal speaker output 0 vides highly stable receive sensitivity over –140 –120 –100 –80 –60 –40 –20 ±0 16.0 22.0 103.5 dB (PREAMP1 ON) 104.5 dB (PREAMP OFF) Receiver input level the entire receive frequency range. -
Testing and Troubleshooting Digital RF Communications Receiver Designs Application Note 1314
Testing and Troubleshooting Digital RF Communications Receiver Designs Application Note 1314 I Q Wireless Test Solutions Table of Contents Page Page 1 Introduction 15 3. Troubleshooting Receiver Designs 2 1. Digital Radio Communications Systems 15 3.1 Troubleshooting Steps 3 1.1 Digital Radio Transmitter 15 3.2 Signal Impairments and Ways to Detect Them 3 1.2 Digital Radio Receiver 16 3.2.1 I/Q Impairments 3 1.2.1 I/Q Demodulator Receiver 17 3.2.2 Interfering Tone or Spur 4 1.2.2 Sampled IF Receiver 17 3.2.3 Incorrect Symbol Rate 4 1.2.3 Automatic Gain Control (AGC) 18 3.2.4 Baseband Filtering Problems 5 1.3 Filtering in Digital RF Communications Systems 19 3.2.5 IF Filter Tilt or Ripple 19 3.3 Table of Impairments Versus Parameters Affected 6 2. Receiver Performance Verification Measurements 20 4. Summary 6 2.1 General Approach to Making Measurements 7 2.2 Measuring Bit Error Rate (BER) 20 5. Appendix: From Bit Error Rate (BER) to Error Vector Magnitude (EVM) 8 2.3 In-Channel Testing 8 2.3.1 Measuring Sensitivity at a Specified BER 22 6. Symbols and Acronyms 9 2.3.2 Verifying Co-Channel Rejection 23 7. References 9 2.4 Out-of-Channel Testing 9 2.4.1 Verifying Spurious Immunity 10 2.4.2 Verifying Intermodulation Immunity 11 2.4.3 Measuring Adjacent and Alternate Channel Selectivity 14 2.5 Fading Tests 14 2.6 Best Practices in Conducting Receiver Performance Tests Introduction This application note presents the The digital radio receiver must fundamental measurement principles extract highly variable RF signals involved in testing and troubleshooting in the presence of interference and digital RF communications receivers— transform these signals into close particularly those used in digital RF facsimiles of the original baseband cellular systems.