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??
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.
I had Jadis Ja80 some years ago on B&W Silver Signature Great looking amps but they never sounded I think Jadis sound is dead with the ending of true-original UK Golden Lions KT 88 tubes.
It is a tube failure, but the original JA-80, which I owned, was VERY hard on tubes because of the high bias current. The original MO Valve KT-88 could last several years, but other tubes would not. The secret is to lower the bias by increasing the value of the cathode resistor (the output stage is cathode biased, not fixed bias).
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