[MRCG] Navy WRC-1 & URC-35 family history - Stromberg-Carlson SC-900A

[Ira J. Moser]

Neat stuff,  Nick!Ira J. Moser, Owner, MECOwww.meco.org(425) 788-0208Orwell was an optimist!
-------- Original message --------From: Nick England <navy.radio at gmail.com> Date: 12/22/24  11:07  (GMT-08:00) To: Jim Whartenby <old_radio at aol.com> Cc: mrcg at mailman.qth.net, milsurplus at mailman.qth.net Subject: Re: [MRCG] Navy WRC-1 & URC-35 family history - Stromberg-Carlson	SC-900A I have acquired a copy of General Dynamics' August 1962 final report on thedevelopment of WRC-1 and URC-35It'll be a while before I can get around to scanning the whole report, butthe intro pages covering some history is here FWIWwww.navy-radio.com/xmtrs/sc/wrc1-urc35-final-6208-intro.pdfI'll also be scanning manuals for the SC-910E exciter, SC-910R receiver,SC-910A amplifier, and SC-905C antenna coupler."Fascinating, Captain...."Cheers,Nick England K4NYWwww.navy-radio.comOn Sun, Sep 25, 2022 at 5:48 PM Nick England <navy.radio at gmail.com> wrote:> OK - The internet tar-baby got me today but I believe I now have a solid> history -> See https://www.navy-radio.com/xmtrs/sc-radio.htm>> I have added photos and references to the SC-901X transceiver, 907, 908A,> and 910A amplifiers, 910R receiver, 910E exciter, and 905C antenna coupler.> These were sold commercially (beginning in 1961 I believe) and to the USAF> as a result of a 1959 USN R&D Contract. The Navy's R-1051, T-827, RT-618,> URC-35, URT-24, and WRC-1 resulted from this contract>> Aha! - I found a patent case showing that in June 1959 the Navy contracted> with Stromberg-Carlson (General Dynamics) "to design and furnish> experimental, mock-up, and developmental models of a single sideband radio> set and a single sideband portable transceiver." (NObsr-77628, dated 16> June 1959 for AN/WRC-1 and AN/URC-35). The Navy had rights to patents> developed during the contract, but General Dynamics claimed some of the> inventions "were conceived and reduced to practice during plaintiff's own,> independent project to develop a single sideband transceiver, called the> SC900A, prior to the award of contract NObsr-77628".> That led me to the SC900A development background.>> https://www.navy-radio.com/xmtrs/sc/SC900A-Board_of_Contract_Appeals_Decisions.pdf> Evidently they had a working radio before the Navy contract was signed.>> Trivia - the original Navy contract referred to the AN/PRC-45 portable> transceiver and AN/URC-35 fixed transceiver. The names were later changed> to AN/URC-35 portable transceiver and AN/WRC-1 fixed transceiver.> [The URC-35 was called portable - HA!]>> And finally I found this -> April 1959 Stromberg-Carlson Advertisement -> - A new approach to Single-Sideband radio by Stromberg-Carlson......> greater power output, less power input with a smaller volume.> - The SC-900A digit-tuned Single-Sideband transceiver marks a significant> advance in the state of the art.> - The SC-900A is designed for both vehicular and fixed point-to-point> communications adaptable to rack mounting and back-pack meets full military> requirements.> - Provides 28,000 stabilized channels from 2 to 30 megacycles, with a> transmitted peak envelope power output of 100 watts.> - Receive input power : 50 watts.> - Average transmit input power for voice: 150 watts.> - Available soon.>> Any additional info, photos, etc. would be greatly appreciated> Nick England K4NYW> www.navy-radio.com>>