View Single Post
Old 22nd Nov 2020, 8:17 pm   #9
GreasedMonkey
Pentode
 
GreasedMonkey's Avatar
 
Join Date: Feb 2019
Location: Worcester, Worcestershire, UK.
Posts: 115
Default Re: GEC Junior Fineline - yet another fault.

Forgive me if it is my misunderstanding, but I would take the word ‘hum’ to mean a low frequency noise of mains derived origin propagating through the circuit. Is there a differing description of ‘hum’ in the TV world. Sorry, but my background is not tv or even AV based.

Surely if it were mains hum causing the issue, it would be evident in the audio as well? There is no noticeable buzz from the loudspeaker, and running the set up from a bench supply would eliminate any mains derived issues.

I know when one leg of the rectifier packed up it played merry hell with both picture and audio. This is different to that, though I understand that that would have been an extreme example.
GreasedMonkey is offline   Reply With Quote