I picked up a fully loaded Zenith Chancellor roundy combo

[kvflyer]

Originally Posted by Electronic M

So ...
Before I verify my work I need to hunt down an issue where after 15 minutes the audio gets distorted.

...

Surely you have considered grid emission of the output tube? However... that is usually with tubes in radios which have a very high filament voltage, like a 50C5 etc. But not unheard of with other "output" tubes.

Hope you "Gitter Going".