The tubes arrived, I installed them, let them warm for an hour, biased, then turned on some music. And.....the problem may be fixed. So, interesting thing when taking out the old tubes. All of the tubes had no markings on them but one, which read EL34G. That tube was in the paired channel where I was having the problem, though in a different socket. I only change the "bad socket" with another tube from the other channel, but never changed out that EL34G tube. It seems strange that a neighbor tube, in the same channel, could have been causing the bias light to light up and stay on its sibling tube, but that seems to be the case. So... now I have to find some amazing speakers to try out. Any suggestions for something that isn't super bright, has a high sensitivity and doesn't cost over, say $800? I know that isn't a huge budget. Thanks again for all your help. I have the old RBH speakers hooked up now and the sound pretty good. I have a call into RBH and have sent them pics so they can give me the model number and specs. They are old. No markings. I'll keep you posted.
Conrad Johnson CAV 50
Just acquired this beauty from my father in law. I've never owned a tube amp, so not sure if I should sell it, or keep it and pay him. Anyway, a question for you tube heads. One of the EL34 tubes in slot V7 ( a tube which can have it's bias adjusted, which I assume means the power transmitted) has it's red light constantly on. I turned the bias all the way down and it still flickers. However, I noticed that my left speaker sounded blown/distorted. When I turned the bias up, the distortion decreased. The instructions say to turn the bias down/counter clockwise, until the red light goes out. But, if I do this, it sounds bad. So, my question is this. Is it simply a tube I need to replace to fix that problem, and if I change one tube, should I change them all. Next question is I searched for the EL34 tubes and of course there are a large variety of them. Any thoughts. To me the amp sounds little bright with the Celstion SL6's I am using, so any warmer tubes would be nice. Also, if I were to sell this setup, any idea on what I might ask on pricing? Thanks.
Roly
Roly
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- 34 posts total
- 34 posts total