A friend of mine just acquired a '65 Princeton Reverb amp, which, he plans to use for harp, but primarily acoustic instuments/general use. He knows little about amps, and asked me 2 questions, and i promised I'd ask u amp experts out there. He asks, and i quote:
" 1) The tubes are Mullard GZ34, RCA 6v6, Mullard 12AX7, and RCA 7025. Do these sound like original tubes? The specs show 3 12AX7's and 1 7025, but the amp has 2 12AX7's and 2 7025's. What gives? 2) If these are the original tubes, should I replace them with something new and store the originals, or does it matter? And what should I replace them with (brands, sources)?
I want to protect the integrity of this amp, but I also want to use it. "