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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

Showing 2 responses by mofimadness

mofimadness's avatar
mofimadness
5,723 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.
mofimadness's avatar
mofimadness
5,723 posts
 
If you are getting a "pop" instead of a "click", that might be the mute relay. When you turn the preamp on, the mute relay stays on for the first 30 seconds or so to stabilize the electronics and tubes. Then it clicks off to allow the signal to flow through.

I was a cj dealer back in day and we had alot of problems with faulty mute relays. I'm not sure how old your preamp is, but I'd give a call the cj tech support and see what they have to say.
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