Hi
I recently built a ST120 amplifier.
When I first started using the amp, the amplifier seemed to be ok.
Recently, I noticed what was initially a faint buzzing noise when I placed my ear close to the amp, not the speakers.
Tonight, after a few hours of listening, I turned down the volume and I noticed the buzzing noise was louder.
I think it’s coming from the solid state rectifier, wz68. I also noticed the power transformer was almost hot to the touch.
Output transformers were fine, same for the BIAS voltage.
I’m not certain if I should be concerned.
Regards
Gabriel
