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

Hi!

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.
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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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