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Why is volume disappearing?

My cj Premier 11A and ET3SE start up just fine.
After 5 minutes or so, the volume disappears. It's like some one is turning down the volume pot down.
All tubes have been replaced with NOS tubes from a trusted vendor.
Problem still exists.
After restarting the system the same problem come back.
Suggestions appreciated.
bogeybuster49
rcprince
3,073 posts
 
From your description it sounds like a protection circuit may be kicking in. A lot of things could cause that. If the original tubes don't correct the problem, I'd contact CJ.
metro04
222 posts
 
Just to confirm. Is it happening gradually, or almost instantaneously after approximately 5 minutes?
bogeybuster49 OP
18 posts
 
Metro04:
It happens instantly after approximately 5 minutes.
As for contacting CJ... I bought a new ET3SE/phono and took delivery two days before Christmas. I sent CJ an email January 2 regarding issues with the pre. I'm still waiting for a response. I sent another email last weekend about this issue and still haven't heard anything from CJ. Guess I won't be buying CJ again let alone recommending their products to anyone.
Post removed 
bogeybuster49 OP
18 posts
 
Jea48
What an enlightened response.
Very informative and helpful.
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