1966 Ampeg B-15N issue - capacitors

[Jack-Jack]

As a side note to this bias problem, one of my cathode-biased Ampegs had a similar issue, after I got it up and working. Turns out, the wiper on the Hum Balance Pot was grounded. On a fixed biased amp, this would not be an issue. But, as soon as I replaced it with one that had an isolated wiper, the bias fell right into place. As the Plexiglass badge had warped on it, long before I got it, I'm sure that it had this same problem for no telling how long before it died. Glad you found your problem and now have a fine amp.

Jack

It works like a champ.

 

[BurningSkies]

It works like a champ.

 

[Jack-Jack]

I mean, Ampeg champ