SPUTNIK 1 Transmitter

ID: 190117
? SPUTNIK 1 Transmitter 
18.May.09 19:55

Joe Sousa (USA)
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Joe Sousa

Does anyone know if the schematic diagrams for the Sputnik 1 transmitter ever were released to the public.

Sputnik 1 was launched in 1957.

The model name of the transmitter was D-200. The two radio transmitters operated at frequencies of 20.005 and 40.002.

A google search returned a lot of hits, but nothing leading to a schematic diagram.



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30.May.09 14:58

Gabriel Toth (CZ)
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Gabriel Toth

Dear Joe,

if you are able to read Russian, all available information about  first Sputnik (including transmitter picture) was collected on forum site http://www.novosti-kosmonavtiki.ru/phpBB2/viewtopic.php?t=7469&postdays=0&postorder=asc&start=0&sid=e3e46af45af38ad297544115719eb6a9

There is an interesting answer from spaceship designer veteran (close to the end of forum): the schematic is top secret until today (what is very usual in SU or Russia) and nobody would like to search for it in the archives. At the end might you can buy it on Sotheby`s auction in the near future:-(((



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Subminiature tubes in Sputnik 1 
31.May.09 02:19

Joe Sousa (USA)
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Joe Sousa

Dear Gabriel,

Thanks for the link. I was able to read it with Google-Translate.

The information that I am I lookin for, is what kind of tubes were used in the D200 transmitter in Sputnik-1. A good interior photo closeup of the transmitter would answer the question.

I have been studying, measuring and designing with the uniquely Russian filamentary subminiature battery tubes such as 1J17B, 1J37B, 1J24P, etc. These tubes are approximatelly contemporary with Sputnik-1, so I wonder if they were used in it's transmitter.

These Russian subminiature battery tubes have the best HF performance I have ever seen for tubes in battery service. Their internal construction is based entirelly on rod elements that controll a pair of sheet beams.

One of the museum photos of the transmitter I came across on the web at 

http://www.collectspace.com/news/news-100307a.html (scroll down to the bottom of the page)

shows two conventional subminiature tubes with all pins comming out at the bottom. The rod-element Russian tubes allways have the anode connection at the top.



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Sputnik TX schematic found! 
16.May.13 19:31
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Tonino Giagnacovo (I)
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Tonino Giagnacovo

Some time ago, DL3JINSM7UCZ and ON6WJ achieved QRP transmitters based on the russian subminiature rod-pentode tubes type 1SH24b and 1P24b with which they performed the contest.

These tubes have a special configuration of the electrodes that made them extremely resistant to strong acceleration and vibration, therefore suitable to be installed on rockets and missiles. 
The wiring diagrams, based on the classic MOPA (Master Oscillator and Power Amplifier) circuit configuration​ were indicated as probable schemes used on Sputnik. 
But, from the analysis of some photographs of the model of the satellite at the Russian Space Museum Energia, the transmitter was slightly more complex than these schemes suggested.
Finally, AA1TJ segnaled in its blog that Oleg RV3GM and Sergey UA3ALW have reported that it was found the original circuit of the Sputnik transmitter (reproduced here from AA1TJ):
image taken from the blog of AA1TJ
All the credits for this discovery should go to RU3AX Boris Stepanov which wrote an article in "Radio" No. 4 of 2013, which describes the transmitters, based on the original report of 1958.
The electronic equipment aboard the first Russian satellites were built by SRI-885 (now "JSC Russian Space Systems"). This group has reissued last year the original report of 1958 (click on the image to follow the link to the Spacecorp press release website):
Here is another view of the Sputnik electronic package (пeредaтчиkи  первого ИСЗ). This unit is composed of the two transmitters (one is clearly visible, with the two antenna connectors in the bottom), and the telemetry commutator system. The cable connects the unit with the battery pack. 
73 from IZ8YRR
AMSAT Italy member

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This thread was moved back manually because it received a valid answer. 

Moved from board »* TALK - visible for members only« on 17.May.13 03:14 from Joe Sousa