Wondering how people deal with PT secondary tolerances when designing from scratch?
I recently rebuilt my 5F1 champ clone I bought off a local builder a few years ago. Lower voltage PT, replaced the cc resistors with cf, larger filter caps, cathode caps, better ground wiring scheme, etc. Overall it made the amp sound better, less noise, but I redesigned it around a 5AR4 with a hammond PT of 500CTVac and when I hooked it up under load it's supplying 533Vac/333Vdc B+ so I went back to using a 5Y3 to get the rails closer to what I wanted, not such a big deal.
However, in the future I'd like to be able to anticipate and plan around it. I've built a few clones (bfpr, 5e4, yba2a...) and they sounded pretty good and the voltage differences on the rails was low enough not to be a big deal, but this is the first time I re/designed a circuit. I have other designs I want to prototype.
I recently rebuilt my 5F1 champ clone I bought off a local builder a few years ago. Lower voltage PT, replaced the cc resistors with cf, larger filter caps, cathode caps, better ground wiring scheme, etc. Overall it made the amp sound better, less noise, but I redesigned it around a 5AR4 with a hammond PT of 500CTVac and when I hooked it up under load it's supplying 533Vac/333Vdc B+ so I went back to using a 5Y3 to get the rails closer to what I wanted, not such a big deal.
However, in the future I'd like to be able to anticipate and plan around it. I've built a few clones (bfpr, 5e4, yba2a...) and they sounded pretty good and the voltage differences on the rails was low enough not to be a big deal, but this is the first time I re/designed a circuit. I have other designs I want to prototype.
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