Anyone had and trouble with Jadis JP 80 amps

I was demoing a pair of JA.80s with KT-88s and on 2 occasions a tube fuse blew. Just wondered if people are having any reliability peoblems or is this just an isolated occurance??

carey111001-17-2010 2:01am

Showing 2 responses by rcprince

rcprince Details Discussions Posts This discussion Message User 3,080 posts 01-17-2010 at 03:59am Copy Comment URL Report Comment Edit Delete The tube fuse on the amps blowing is indicative of a bad tube, not of a problem with the amps. I used to have a few go as my tubes grew older or went ballistic.
rcprince Details Discussions Posts This discussion Message User 3,080 posts 01-18-2010 at 04:00am Copy Comment URL Report Comment Edit Delete Agree with Gmuffley about the high bias and tube failures. The old MO Valve and GEC KT88s lasted well in them, but every 6550 tube I tried started going bad within a year, and EL34s about the same. Too bad I didn't know about the trick with the resistors to lower the bias, might have saved me some money on retubing.

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