try1256
Super Member
I have recently developed an audible hum coming from my CA-810. Not through the speakers, from the unit. I figured it was transformer hum. I removed the cover and the transformer was pretty hot. A couple of days ago, I opened it up to check and adjust the idle current and I noticed when the amp was sitting on its end, it didn't hum. That night afterward, I didn't hear a noticeable hum. Now it's back. Is there anything else that can cause a hum like that? Thanks