ECL82 Massive humming

[Valmond]

@nigelwright7557

Wow, actually your first comment was exactly what was happening, I just hadn't found it / understood it yet

 

[ChrisABC]

here's another:

http://www.americanradiohistory.com/Archive-Radio-Electronics/50s/1953/Radio-Electronics-1953-05.pdf

page 65

 

[Valmond]

That's a really throughout listing, even a 'last ditch measures' with things that seemingly havent changed in a half century!

This should IMO be in a sticky post.

 

[Diego Zordan]

Hi Valmond, I was dealing with a problem of hum with an ecl82 too, I found the solution by separating the HT of the pentode anode from the triode anode and modifying the power supply, I give you the schematics here

 

[Diego Zordan]

I think I had an error uploading the images, here they
just in case