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View Full Version : High pitched squealing in reverb tank?


JDW3
01-01-2006, 05:47 PM
I decided I would finally get rid of the squeal thats been plaguing my '68 Traynor Custom Reverb for years. With volumes above 5 it would start squealing very loudly. I thought it was a tube and replaced each section with a known good tube. When this didn't work I simply unplugged the tank; no noise.
I really want the reverb, and I did notice that unplugged, it is now a gain knob, giving a small gain boost.

Does this show that the tank is bad? It works great at low volumes; tons of huge reverb. Possibly a bad cap inside the amp? I figured the tank was fine as the verb actually works.

VintageJon
01-01-2006, 06:00 PM
The two causes I've seen for this are 1: a bad ground connection at the plug to or from the tank
and 2: a dried-out cathode bypass cap in the reverb driver or recovery amp.

-Jon

JDW3
01-01-2006, 10:44 PM
Thanks Jon, I'll check those out.

Any other ideas?