It isn't though... more like a question about two transformers. I am planning a blackface vibrochamp build for my dad for christmas. I have two PT's hanging around from old radios that seem like they would be in the ballpark of ok. One is a 275-0-275, and the other is a 325-0-325. Any thoughts on which would be preferred? The latter would certainly end up running a lot hotter b+ than the schematic, but I have heard some argue that it may actually be driving an old amp with modern outlet voltage that makes people love vintage gear so much. Others have argued using lower spec PT's to get the b+ back down results in a sweeter sound. Looking for general input.