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Old 7th May 2011, 07:33 PM   #1
Jeb-D. is offline Jeb-D.  United States
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Default 6P3C-E Datasheet help

Can anyone tell if it specifies forced cooling on this datasheet?
''GSTube.com''. Tubes, sockets etc. Parameters and characteristics 6P3C-1

I see that it says 2 x 20 W plate dissipation, but I'm skeptical that this envelope can handle 40W combined plate dissipation + G2 dissipation and filament power. It's small; comparable in size to common 20W rated tubes. I recently obtained a few boxes of mixed parts which contained a pair of these. Thinking of doing a pair of single output tube PP amps.
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Old 7th May 2011, 11:06 PM   #2
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Everything is correct, 2 x 20W
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Old 8th May 2011, 02:01 PM   #3
SVStube is offline SVStube  Ukraine
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Not very reliable tube, make better use of its military analogue ГУ-19 (GU-19)
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Old 8th May 2011, 09:27 PM   #4
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This tube /from link/ is 6R3S /6Р3С/. 6P3C-E /6П3С-Е/ is mono beam tethrode, close to 6L6.
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Old 8th May 2011, 11:50 PM   #5
Jeb-D. is offline Jeb-D.  United States
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Quote:
This tube /from link/ is 6R3S /6Р3С/. 6P3C-E /6П3С-Е/ is mono beam tethrode, close to 6L6.
My mistake, I meant 6P3C-1, not 6P3C-E. The link is for the tube I was referring to.

Quote:
Not very reliable tube, make better use of its military analogue ГУ-19 (GU-19)
So I've heard, but to my knowledge the Priboy is the only amp that has used this tube. I wonder how much of this tubes bad reputation is the fault of the amp design and how much is the fault of the tube itself.

GU-19 looks interesting. Seems like a direct swap. Maybe I'll run the 6P3C-1 for now and then replace them with GU-19 once they fail. It appears that GU-29/829B would also interchange if the socket were changed with it.
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Old 9th May 2011, 05:21 AM   #6
SVStube is offline SVStube  Ukraine
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GU-29 is very similar to GU-19, but I like more. See circuit diagram with the article http://lynxaudio.narod.ru/articles/Lynx_VTA39.pdf. Very interesting amp.
You can use the GU-19 (6R3S-1)
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Old 9th May 2011, 05:24 PM   #7
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As I get it, the 6R3S is very unreliable, whereas the transformers in the Priboi amp are overrated. The O/P trannies also are supposed to be used for the 4-tube 75W version of the amplifier.


Quote:
This tube /from link/ is 6R3S /6Р3С/. 6P3C-E /6П3С-Е/ is mono beam tethrode, close to 6L6.
THAT sounds interesting.
I have a spare 6R3S that I want to use for a simple two tube amp in the future.

Be careful when using/transcribing cyrillic letters as especially the Russian equivalent to 6L6 can easily be mistaken for the dual tetrode used in the Priboi amp.
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Old 22nd August 2011, 03:25 PM   #8
tchiwam is offline tchiwam  Finland
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Blast from the past, I still have 8 channels up and running, one of the amps has many, many hundred of hours on it and it still goes on. I used the GU-19 for a while and it works well at around -10V bias.

I think the most important is to keep the priboi bias really well balanced.
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