My father, who recently passed away, was an avid audiophile and very proud of his stereo. I’ve been taking inventory of his gear, and while most things are easy to identify, I can’t find any distinguishing marks on this power amp. Can anyone help me identify it? The power tubes are 8417s. Thank you!Carlsbad2 - Absolutely Not!!! Never ever do that with vintage tube gear unless you want to risk replacing an expensive and hard to find transformer.
Bring up the voltage slowly on a variac is the right thing to do.
so it may be a GSI modified Dyna Stereo 70 that uses 8417 output tubes