I'm in the process of getting parts together to build an integrated Mark III and PAS 3X. I have a schematic for a modded Mark III and a PAS 3X. I've mostly repaired antique radios, and now want to try making an audio amp. I tried designing an OTL with 12-6AS7s, but never could get it to work.
I plan on using an Antek 4TK400 power transformer and a set of EDCOR's CXPP60-MS-4.2K output transformers. For tubes, I was looking at JJ KT88s, 5U4s for rectifiers (I have about 20), but I'm lacking 12AX7s. I've read alot about the 12AX7A, but not about the 6AV6 being used in audio, I have plenty of 6AV6s and 6AT6s.
I talked to our local metal fabricator and got a price to make the chassis. It will cost alittle more to use 6AV6s (two more holes), but not as much as 2 new 12AX7s.
What should I use for a chassis, stainless?
Should I get the 12AX7s or just use the 6AV/AT6?