Well, I set the bias OK on the left channel this morning, but just hit a snag setting the RH channel. I put the RH power tubes in and powered up: the rectifier tube flashed, there was a hum and I pulled the power immediately. The fuse had blown, I guess right as I was pulling the power.
Nothing seemed wrong underneath. I thought it might be a bad power tube, so I put in a new fuse and plugged in the power tubes from the LH channel. It powered up fine and I set the bias on the front tube, but the rear one is dead. I know the tube is good and the amp is running: no blown fuse: but the right rear tube doesn't glow and there's no bias voltage.
Any ideas would be MUCH appreciated. I looked again at the solder joints etc and all looks good to me. Everything on the amp is new, even the tube sockets, except the tubes and output trannys. I tested the rectifier tube (NOS RCA) but couldn't check the JJ KT66 tubes.THANKS!!