View Single Post
Old 1st Dec 2021, 3:21 pm   #21
Gabe001
Octode
 
Join Date: Oct 2019
Location: Stockport, Greater Manchester, UK.
Posts: 1,612
Default Re: Bush DAC90A hum - AGAIN!

If you disconnected the lead from IFT to VC and the hum persists, it's not that lead.

It's probably something in the output stage (from VC onwards) too close to an AC supply. This could be from mains, heater, or scale lamp circuits. You may need to do some careful prodding with a chopstick -move things a bit and see what happens to the hum. A quick test to see if your vc is the problem is to bypass it.
Gabe001 is offline