Silver Supporting Member
If you replace the matched pair of stock GT 6V6 power tubes in a PRRI w/ a matched pair of JJ 6V6 power tubes do you have to re bias the amp?
Does anyone know if the PRRI has a bias pot? If so, it's not too difficult to bias yourself IF you have a bias probe (sold separately).
I did a quick search and it seems that there isn't one installed. One guy talked about installing one in his amp.i don't know if mine has a bias adjust pot. It's a new FSR tweed 65 PRRI 15W model / a 12" speaker.
I'll pl the back panel off when I get a chance and check it out
From the schematic, PRRI does have a bias pot, and 1 ohm cathode resistors.