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Cary SLp05 Preamp noise

recently I encountered a buzz in my right channel and after usual ground loop investigation did not reveal the problem, I looked at maybe a bad tube in my Cary preamp. The tube tester did not reveal a defective tube but what I noticed was that moving the tubes around in the sockets would eliminate the buzz. I'm using Sylvania 6SN7's and this continues to happen. Pins look clean and shinny and I have cleaned them superfiscouly but the problem seems to pop up every once in a while and I'm wondering if there is something that I don't know about pin and pin socket fit up. Can anyone shed light on this situation?
markus1299
jburidan
803 posts
 
Check for cracks on the RCA socket
markus1299 OP
252 posts
 
I found a bad tube that didn't test bad on my tube tester but when replaced, cured the problem. Macdadtexas, I've always admired those Cary's. I'd bet the sound through those maggies is incredable. I've got a CAD200 and see an ad for a similiar unit. I'm wondering how some planars would sound paired with 2 of those.
pedrito
10 posts
 
Hi, Markus
The same problem happen to me (left channel buzzing) which disappeared moving the tubes but appeard again randomly. I bought two matched tubes (russian tung sol) and the problem was gone four days ago. I keep my fingers crossed!
Pedro
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