[ARC5] PS Hum in BC-453-B (solved!)

[Roy Morgan]

On Jan 30, 2015, at 10:44 AM, Bill Cromwell <wrcromwell at gmail.com> wrote:

> The OP is still very much in the conversation which is still about hum in the audio output….The hum I have is not a real problem but it is still there and so I have pointed it out. Possibly a small amount (it *IS* small) is being picked up on my (external) wiring. It won't be hard to determine. Caps and twists - enter stage left.

An interesting test to find where the slight hum is in the system would be to short the audio tube grid to ground while listening carefully.

Roy


Roy Morgan
RoyMorgan at alum.mit.edu
K1LKY Since 1958