WARNING: Tube/Valve amplifiers use potentially LETHAL HIGH VOLTAGES.
Building, troubleshooting and testing of these amplifiers should only be
performed by someone who is thoroughly familiar with
the safety precautions around high voltages.

Russian 6CA4/EZ81 Equivalent?

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I typically use Epay to point me in the direction of optional tubes. I haven't seen a Russian equivalent. Is there one?

It`s no Russion analog EZ81. May be, something like 6C5S (6Ц5С) or 5C4S (5Ц4С) with 5V heater.

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