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Old 22nd July 2009, 09:09 PM   #1
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Question Question - Closest Russian Analog of 12BH7A


Anyone can suggest closest Russian analog/substitute for 12BH7A? Used in push-pull amplifier to drive output stage.

Thanks in advance for any suggestions(s).
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Old 22nd July 2009, 09:41 PM   #2
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I don't think there is anything that could be called a close substitute.

You don't give many details of what you are looking for. Are you looking to sub in a Russian substitute for an existing design that has a 12BH7A? If so, I am guessing that it is a split load phase inverter and many tubes such as 6N1P, 6N6P, 6H8C, with a gm of at least 3100 would work OK. If you want a better answer, you should either identify the design, or at least the phase inverter type, and whether both noval and octal tubes are OK.
The whole problem with the world is that fools and fanatics are always so certain of themselves, and wiser people so full of doubts. Bertrand Russell
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Old 22nd July 2009, 10:01 PM   #3
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It is existing design, schematic attached.
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Old 22nd July 2009, 10:04 PM   #4
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All 3 suggested by Leadbelly will work fine.
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