- August 27, 2020 at 11:24 pm #1466
I have a TA-20 coming this week and have a question about tubes for this. I own another tube amp that accepts 12AX7 and 12BH7 preamp tubes. I understand that the TA-20 comes with 12AU7 tubes but I have quite a few matched pairs of other 12xx7 around for my other amp. It sure would be nice to be able to use a few of the tubes I already have on hand.
Can 12AX7 and/or 12BH7 preamp tubes can be safely used in the TA-20 without causing damage?
Thanks.September 1, 2020 at 10:18 pm #1507xDuoo OfficialSenior Moderator
It won’t be damaged. It can be used, but the output power may be differentSeptember 1, 2020 at 11:37 pm #1506
I guess it is safe to assume at this point that nobody has ever tried using different 12xx7 tubes on the TA-20 amp. I suppose I should just sell the TA-20 rather than chance damaging it.
Thanks anyway.September 2, 2020 at 9:44 pm #1515
Thank you very much for the response. This is comforting since I like the amp but I also didn’t want to damage it from trying different tubes. I appreciate you taking the time to respond.September 15, 2020 at 4:09 pm #1536
I have one more question please.
Are the tube filaments running at 6 volts or 12 volts? Thanks.September 16, 2020 at 10:00 pm #1637xDuoo OfficialSenior Moderator
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