As a side note - this "running a single channel problem" won't happen with a stock ST-70 which has a separate bias resistor for each channel or a VTA boarded ST-70 which has a separate bias control for each output tube.
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scott6058 wrote:Just goes to show your learning curve is still healthy.
I'm a newbie to my st35 and have a question.
What could cause my one input tube to glow in the leads below the bottom plate at initial start up. It only happens to this one tube regardless where I place it. If I shut it down and fire it up a minute later it behaves fine.
Thanks for all your efforts Scott
Sal wrote:Hi Bob,
Just wire in the ST35-BCU bias upgrade kit from Dynakitparts.com and that should solve your mono testing techniques... :-)
The ST35-BCU works great on a SCA-35 also.
PS: Might be hard to bias the stock ST-70 with only 2 tubes installed.