Tube Amp Archive

Smoke was white Hey! Another new pope! :D BAWAHAWAHAWA! :lol: I'm glad I didn't have a mouth full of coffee when I read that. Seriously though, OP please don't go beyond you skill level with a high voltage tube amplifier. They can bite hard and stop your heart. :( Ask for advice before going any fu...

White might be good news - treble check the polarity of your electrolytic caps. A common 'gottcha' seems to be installing the caps in the bias supply backwards (as they go + to ground).... Can somebody expand on the topic of bias supply? I've attached the schematic I'm working from. It does look li...

Thanks everyone for the advice, Smoke was white, at this point I guess i'd be surprised if it wasn't the transformer, serves me right for just plugging the damn thing into the outlet. I'll pull out the tubes and place the amp in series with a desk lamp, we'll see if there's any smoke left... fyi yes...

So I just finished recapping a 50's Challenger HF8 mono block hifi. I'd never turned it on before nor had the previous owner, so I don't know what condition the rest of it is in. I replaced all the caps (some values are not identical) and bought new tubes... I didn't test the bias, I have no tools o...