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CJ PV-10 no sound

I installed a couple of GE 12AT7WA's (bp triple mica, aquired on E-Bay)into my CJ PV-10 today, and as soon as it came on, snapping sound and a hum. Now, no sound coming from pre-amp. It appeard as if one of the tubes shined brighter than it ought to prior to this happening. I'm going to go and get a new fuse to rule that out, but it looks OK. (BTW, so much for a the tube tester. Tested very good, no shorts!). On a seperate note, if I'm not able to get it fixed right away, I've tried running my NAK 670zx directly to my Classe 15 amp, and running my X-Ray CD player through the cassette deck. Sounds great (although I ALWAYS miss my tube sound). Any problem with this? Thanks
countryjazz2
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uru975
684 posts
 
Have you tried putting the old tubes back in to see if it works? Assuming they were still working in the first place.
If that allows it to work the problem was a tube only, then it is a matter of finding out which one, which is basically a process of elimination.
Try that first.
countryjazz2 OP
17 posts
 
Yes, I put the old tubes back in. I also replaced the fuse. No sound. A bit of a pop and hum after about 20 seconds (when it would normally come on, then total silence).
mofimadness's avatar
mofimadness
4,977 posts
 
Sounds like you had a faulty tube that took out a resistor or diode. Probably need to send it back to cj for service. Bummer...sorry.
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