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Making Old Television Technology Make Sense 2019-10-27
Repositorium für die Medienwissenschaft Paul Marshall Making Old Television Technology Make Sense 2019-10-27 https://doi.org/10.25969/mediarep/14764 Veröffentlichungsversion / published version Zeitschriftenartikel / journal article Empfohlene Zitierung / Suggested Citation: Marshall, Paul: Making Old Television Technology Make Sense. In: VIEW Journal of European Television History and Culture, Jg. 8 (2019-10-27), Nr. 15, S. 32–45. DOI: https://doi.org/10.25969/mediarep/14764. Erstmalig hier erschienen / Initial publication here: https://doi.org/10.18146/2213-0969.2019.jethc163 Nutzungsbedingungen: Terms of use: Dieser Text wird unter einer Creative Commons - This document is made available under a creative commons - Namensnennung - Weitergabe unter gleichen Bedingungen 4.0 Attribution - Share Alike 4.0 License. For more information see: Lizenz zur Verfügung gestellt. Nähere Auskünfte zu dieser Lizenz http://creativecommons.org/licenses/by-sa/4.0 finden Sie hier: http://creativecommons.org/licenses/by-sa/4.0 volume 8 issue 15/2019 MAKING OLD TELEVISION TECHNOLOGY MAKE SENSE Paul Marshall Golden Age Television LLP Fern House Church Road, Harby, Newark Nottingshamshire NG23 7ED United Kingdom [email protected] Abstract: How does traditional analogue television work? That’s a question beyond the comfort zone of most media historians who may not be familiar with analogue electronics. Even young engineers know little of thermionics, cathode rays and a myriad of other forgotten technologies. This important facet of television’s history is now only recorded by older engineers and by amateur groups who collect these technologies. In this paper, I will show by using examples how material artefacts can help us understand television’s history more fully. -
Lot Number Description 1 Small 3 Valve American Receiver, Black Case
Lot Number Description 1 Small 3 valve American Receiver, Black case. 2 Wireless set Canadian No. 52, Metal case + PSU. 3 Philips model 161U Bakelite Receiver. 4 Ortec phase sensitive detector 9412A 5 CT52 miniature Oscilloscope. 6 General Radio 650-A Impedance bridge. 7 Regenerative Receiver, possibly Eddystone. 8 Wartime Civilian receiver, AC mains, Ultra. 9 EMI Research diascope. 10 Wireless remote control type A. 11 Wayne Kerr 0.22B video oscillator. 12 Philips model 232U green painted Bakelite Receiver 13 Bush model BAC31 portable Receiver. 14 Sony CF550A stereo radio/cassette player. 15 Early VEGA 402 transistor radio. 16 Ekco model AC85, painted black Bakelite Receiver. 17 HMV model 440 receiver. 18 Philips model B2G81U 1960's plastic cased Receiver 19 Tray of 1920's components. 20 KW 'Vanguard' top band to 10 meters Transmitter. 21 Masteradio record player. 22 Grundig Reporter 700L reel to reel tape recorder. 23 Biscuit tin aerial tuner. 24 Type R208 Receiver. 25 Bush model VHF90A Bakelite Receiver. 26 Bush model TR82 reproduction radio. 27 Roberts model RCS80 synthesised tuning, Wkg. 28 Allander Hi-Fi Stereo headphones in box. 29 PYE model T17 Receiver. 30 Mullard model MAS305 Bakelite Receiver. 31 Home constructed 1 valve + Crystal set. 32 Westinghouse H-38375 Ivory Bakelite Receiver, Wkg. 33 GECoPhone 'Junior' crystal set. 34 PYE model Q batt. Transportable, good condition. 35 PYE model P117 'Piper' AM/FM midget Receiver. 36 Murphy model B143 valve portable Receiver. 37 BTH type C2 metal horn speaker. 38 EKCO model AW70 Bakelite Receiver. 39 Windsor 65C signal generator. 40 Tray of assorted radios etc. -
The Restoration of Valved High Frequency Communications Receivers
THE RESTORATION OF VALVED HIGH FREQUENCY COMMUNICATIONS RECEIVERS by: Chris Parry, G8JFJ Third Edition, January 2014 © Christopher Parry, 2014. This issue: 5th January 2014 You are welcome to freely distribute copies of this book provided it is kept complete, and with its copyright statement. If you wish to copy extracts from the text, or reproduce any of the pictures, then please attribute each extract and/or picture to Chris Parry, G8JFJ. This book is available free of charge as a service to the vintage radio community. If you have paid money for a copy of it, then someone has taken your money without the permission of the writer or the operator of the hosting server. The publicly available master copy of this book and its pictures are held only on Simon Buxton’s website www.vk2bv.org/radio/ Updated issues will be published on this site from time to time. PREFACE TO THIRD EDITION Several years have passed since this book was first published on Simon Buxton’s VK2BV website. The writer now realises he is lucky to have started in this hobby many years ago, long before the prices of old radios started to rise appreciably. In 2012, the supply of collectable and restorable old radios newly emerging from storerooms and garages all over the UK is finally drying up. Nevertheless there still seem to be many young people keen to learn the skill of working on this equipment. That is the good news for our hobby. Sadly, those who performed the original design and operational work are now elderly, and many are no longer able to teach the knowledge. -
Design for a "Quality" Receiver
IS UE'S DESIGN FOR A "QUALITY" RECEIVER Vol. LITI. No. 12 www.americanradiohistory.com Advertisements írc1cS% World December, 1947 The Research Engineer knows that the best speaker for any set is one that offers complete reliability plus true tonal fidelity. After exhaustive tests his advice is always the same -fit Rola and relax ! BRITISH ROLA LTD 8 UPPER GROSVENOR STREET LONDON W.1 www.americanradiohistory.com December, 1947 Wireless World Advertisements r The 50 -range Model 7 Universal AvoMeter, the pioneer of the compre- hensive range of " Avo " Precision Instruments, is the world's most widely used combination electrical testing instrument. Fully descriptive pamphlet available from the Sole Proprietors and Manufacturers :- THE AUTOMATIC COIL WINDER & ELECTRICAL EQUIPMENT CO., LTD. - - ICTORIAi404/9 W I N D E R H O J S E D O U G L A S S T R E E T L O N D O N S W T'ELEPHONE. V www.americanradiohistory.com 2 Advertisements Wireless World December, 19¢7 MARCONI 1Vlastery of 1Vleasirrement is displayed in its unique range of Communications Test Gear FOR IMMEDIATE DELIVERY . IMPEDANCE COMPARISON BRIDGE TYPE TF 202E The instrument is a self- contained A.C. mains Brief Specification: operated bridge for the rapid comparison of Operating Frequency - 10 kc /s; similar capacitors, inductors or resistors and Range - - - L 250p11-1H ; comprises a 10 kc/s oscillator, a bridge network C 20ppF -lµF; and a visual balance- indicating system. It is R 20 ohms-1M ohm ; precision -made to give lasting. reliable service Accuracy - ± 0.2% MARCONI INSTRUMENTS LTD ST. -
To Radio and Radar Air Publications
This document was generated by me, Colin Hinson, from a Crown copyright document held at R.A.F. Henlow Signals Museum. It is presented here (for free) under the Open Government Licence (O.G.L.) and this version of the document is my copyright (along with the Crown Copyright) in much the same way as a photograph would be. The document should have been downloaded from my website https://blunham.com/Radar, if you downloaded it from elsewhere, please let me know (particularly if you were charged for it). You can contact me via my Genuki email page: https://www.genuki.org.uk/big/eng/YKS/various?recipient=colin You may not copy the file for onward transmission of the data nor attempt to make monetary gain by the use of these files. If you want someone else to have a copy of the file, point them at the website. It should be noted that most of the pages are identifiable as having been processed my me. _______________________________________ I put a lot of time into producing these files which is why you are met with the above when you open the file. In order to generate this file, I need to: 1. Scan the pages (Epson 15000 A3 scanner) 2. Split the photographs out from the text only pages 3. Run my own software to split double pages and remove any edge marks such as punch holes 4. Run my own software to clean up the pages 5. Run my own software to set the pages to a given size and align the text correctly. -
The Pioneers of Telegraphy, Telephony, Wireless, Radio, and Television
Appendix 1: Company Histories in Brief: The Pioneers of Telegraphy, Telephony, Wireless, Radio, and Television Bell Telephone Company (The Bell System), US The Bell Telephone Company was formally incorporated in 1877 by Gardiner Hubbard, the father-in-law of Alexander Graham Bell. Thomas Watson was put in charge of the technical functions of the company with Bell himself not being involved in the day-to-day opera- tions of the company. Later that year, the company set up its first tele- phone exchange in New Haven, Connecticut. Within just a few years, the company had licensed the setting up of telephone exchanges in every major city in the United States. These franchises together with the parent company became known as “The Bell System” (with a bell as the symbol of the system). By 1881, the parent company had bought a controlling interest in the manufacturing company, Western Electric, which was promptly turned into the monopoly supplier of equipment to the Bell System. A few years later, the American Telephone & Telegraph Company (AT&T) was set up as a subsidiary to establish the long-distance com- munications network. By 1885, AT&T had set up the first of these long-distance lines between New York and Philadelphia. The network then rapidly expanded to cover most of the United States as well as Canada and was run more or less as a monopoly by Theodore Vail, the then president of the company. There were in all 22 local operating companies, which later became popularly known as “Baby Bells.” In 1899, AT&T acquired all the assets of the parent company.