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The 'Mule Project'- learning about valve/tube amps on a B25.
#4
I'm not sure how a 12au7 would perform in the b25... have you tried putting the 12ax7 in channel 2 to see if that channel behaves when it has the right tube in it?

the circuits in both channels are the same, so if channel 2 works with the 12ax7... its likely that the b25 doesn't like the 12au7.
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RE: The 'Mule Project'- learning about valve/tube amps on a B25. - by Hangman - 05-10-2015, 11:39 PM

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