A while back I was in my F2-B preamp to fix what ended up being a broken solder joint on one of the power supply filter caps. I really wanted to replace them altogether at that time, but the only high voltage electrolytics that I could find from my usual component vendors would have cost upwards of 80 bucks for the set(!).
Forward to just recently, and this thing's started humming something fierce. I figured these 30+ year old caps finally gave up the ghost, so I went looking again and found a place called Just Radios (
http://www.justradios.com/) who specialize in restoration parts for old tube radios. Found a set there for just over $13, and their turnaround on the order was really fast.
Well, that fixed the hum and the old preamp sounds mighty fine once again! Honestly I wasn't sure if/how these "cheapie" caps would compare to the rather expensive Cornell Dubilier replacements. If any of you amp gurus have opinions on that, you won't offend me- might be good to know for future reference.
Anyway, just thought I'd share that source in case it helps anyone else.
