Many times the knob is causing it to be stiff when it touches the nut.Karl wrote:Hello guys,
I got on my bench today a reissue Marshall Bluesbreaker. When it came to me it was losing all power after it had been running for 10-20 minutes. First thing I checked was all electrolytic caps. All elytic caps tested OK.
Next I replaced 3 potentiometers volume 1 and 2 and bass. The old ones were very stiff and almost impossible to rotate. After this I tested the amp and played it for 2 hours without having any problems.
My question to you guys is since I am only 21 years old and have limited experience.
Has anyone had similar problems with pots failing when they get hot?
Is it a common problem for pots to get extremely stiff in amps with the controls facing up?
Thanks
Most failures are a cracked wiper or loose crimp which can be hard to see or diagnose.