| ilimzn |
I have a few of these, but can't find any curves for them - or equivalents:
GI30 - looks similar to a 3E29 or 829
GU18 - looks similar to a QQE03/20
Any help, anyone? |
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| CarlyBoy |
| Those tubes intrigued me as well. Don't know of any curves. I'd have to derive my own from scratch. The other big problem I saw was they seem to take a dedicated type of socket I couldn't source. Did you find some? |
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| Wavebourn |
Many Russian tubes are clones of American and British tubes, they were manufactured during WW-II to replace originals in equipment used by Allies.
Clone of 829 is GU-29 http://hamradio.online.ru/ftp/gu-29.pdf
But except them needed to replace tubes in already working equipment Soviet engineers cloned some remarkable German tubes for a new production. They were based on German prototypes, but had different sockets and envelopes. One of them is the best for audio (IMHO) power ray pentode GU-50 that is a version of German LS-50 developed and manufactured by Telefunken.
Here is the original:
Here is post-WWII production by Telefunken, simplified to be cheaper in production:
And here is Russian military clone:
All of them are ray pentodes. They are more costly in production than ray tetrodes because of strict requirements to grid alignment.
Also, there was 6R3S-1 tube used for audio output stages, but IMHO GU-50 is much better though was developed for military radio transmitters.
http://www.tubes.ru/techinfo/HiFiAudio/6r3s-1.html |
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| ilimzn |
Thanks! The curves are low res but they are still useful. I will eventually plot them myself but for now the tubes have already passed the 'usefulness' test :)
GU18-1 socket is the same as for the GU50. Admittedly, the sockets tend to soct more than the tubes, but for now this is not a problem for me as I have a few.
GI30 uses a 7-pin socket that is much moe easily obtainable, same as 6S33S and some other big tubes. |
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| soundbrigade |
Wavebourn wrote:| quote: | | Also, there was 6R3S-1 tube used for audio output stages, but IMHO GU-50 is much better though was developed for military radio transmitters. |
You mean that 6R3S is somehow similar to GU50?. I am intrigued by making over my Priboi amp once again - restore the B+ voltages and throw in some more reliable tubes like GU50. |
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| Conta |
| quote: | | Also, there was 6R3S-1 tube used for audio output stages, but IMHO GU-50 is much better though was developed for military radio transmitters. |
6R3S tube is a bad product of the Soviet era. Full Soviet design with bad options and sound. GU-50 is much better indeed. |
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| soundbrigade |
I know that it falls under the cathegory of "self-destructing tubes", but is a 6R3S more or less directly replaceable by a GU50, taking in consideration that the 6R3S is a dual beam-tetrode with a different pin-out?
I have a few schematics of GU50 and 6P36S using the Priboi-chassis. |
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| Conta |
| quote: | I know that it falls under the cathegory of "self-destructing tubes", but is a 6R3S more or less directly replaceable by a GU50, taking in consideration that the 6R3S is a dual beam-tetrode with a different pin-out?
I have a few schematics of GU50 and 6P36S using the Priboi-chassis. |
Direct replacement 6R3S certainly is not possible. It is necessary to adjust the amplifier anew too. The tube 6P36S will be the best variant than GU-50 IMHO. Though GU-50 works in PP amplifiers not bad. |
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| soundbrigade |
Thanks for your advice. I got them all and actually wanted to save all my GU50 to a PP-amp with quads (120W) in the future. I have some 10+ of th 6P36S.
I rebuilt the Priboi accordning to Likhnitsky's plans which resulted in a 12W trioded classA amp. I want the powers back!!!:smash: |
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| datoan |
Hello
read the discussion and would like to suggest good replacement - Old eastern Germany RFT (WF) double tetrode - SRS4451 - have some tubes. This tube is very closed to russian 6P3C but much better - 6P3C is not well balanced!
Thanks |
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