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The "Stupendous" 6P1P 4PP amplifier!
The "Stupendous" 6P1P 4PP amplifier!
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Old 8th November 2018, 10:32 PM   #141
Wavebourn is offline Wavebourn  United States
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The "Stupendous" 6P1P 4PP amplifier!
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Originally Posted by Tyimo View Post
Many people say 6P3S is = with 6L6GC.
..while actually it was licensed from RCA 6L6GT, and renamed in 1950'Th to 6П3С.
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Old 9th November 2018, 05:42 AM   #142
artosalo is offline artosalo  Finland
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Do you know about the history of 6П3С-E?
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Old 10th November 2018, 04:35 AM   #143
Wavebourn is offline Wavebourn  United States
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The "Stupendous" 6P1P 4PP amplifier!
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Do you know about the history of 6П3С-E?
No. I know only that it was used in a communications equipment.
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Old 14th August 2019, 12:41 AM   #144
carageae is offline carageae  Romania
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As far as I know, 6П3С is very close to 6L6G (not GT!) and 6П3С-E is very similar to 5881...search practical schematics and you will see the substitute I give are working.
The Russians also state that the 6П3С-E is the long-life version of 6П3С...in fact is very different also in sound. I made an SE amplifier once, with 6П3С and just for curiosity changed (without any other modification) the tubes with 6П3С-E...the sound was completely different, the 6П3С has a warmer sound, very easy to distinguish by ear. If I remember well, the Ua was 360V and Ra of the output trafo was 5K. Not the ideal conditions, but I could have a decent 5W in pentode mode.
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Old 14th August 2019, 05:52 AM   #145
Wavebourn is offline Wavebourn  United States
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The "Stupendous" 6P1P 4PP amplifier!
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Originally Posted by carageae View Post
As far as I know, 6П3С is very close to 6L6G (not GT!)
No. Very close to 6L6G (not GT!) is Chinese 6P3. There was a copy of 6L6 (not G) in USSR as well, but it was called 6Л6С.

Quote:
and 6П3С-E is very similar to 5881...search practical schematics and you will see the substitute I give are working.
They were named 5881 by ebay sellers because they have similar height. It is a different tube.
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Old 14th August 2019, 06:21 AM   #146
Francois G is offline Francois G  United States
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Quote:
Originally Posted by Wavebourn View Post
No. Very close to 6L6G (not GT!) is Chinese 6P3. There was a copy of 6L6 (not G) in USSR as well, but it was called 6Л6С.



They were named 5881 by ebay sellers because they have similar height. It is a different tube.
Wavebourn, thank you for your info-sharing. You are like a Soviet-tube encyclopedia, just not as dry.
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Old 14th August 2019, 01:04 PM   #147
carageae is offline carageae  Romania
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The 6L6 family is a big one...all I can say is that, even if the russians say the only difference is the life time, 500 vs. 2500 (I also read somewhere 5000h), and beyond the physical differences, the tube sound different in SE application. Tested not read.
????? 6?3?, ??????????????, ?????????, ????, ??????, datasheet, ??????????, ?????, ??????????, ???????, ?????????
????? 6?3?-?, ??????????????, ?????????, ????, ??????, datasheet, ??????????, ?????, ??????????, ???????, ?????????
looking at the 5881 parameters, I say they can be replaced...
5881, Tube 5881; Rohre 5881 ID5916, Beam Power Tube
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