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I finally got around to installing the VRM today and it seemed to go well. I turned the amp on and the lamp came on and the tubes lit up. I then took it off standby and everything went dead. It blew the fuse. I had seen an image from someone else that had taken the standby off the B+ and ran it straight back to the VRM pot. I didn't see anything that said to do that so I left my standby only wired to the B+. So was I wrong? Do I need to take the standby off the B+ and run directly to the VRM pot?

Ok. So I got home from church today and pondered what to do. I decided to go ahead and remove the wire from the standby switch to the B+ and run it straight from the standby switch to the VRM pot. After soldering everything in and touching up the solder on the transformer ground, I inserted a new fuse and plugged it in. Flick the main switch on...everything good, light on, tubes glowing. Flip the standby switch on...no noise, no smoke, light on and tubes still glowing But something is different, it is very quiet. No hum at all. I'm worried Pick up my guitar and strum...perfect sound I crank up the gain and the volume and back the voltage down and it sounds great! Then I thought I would press my luck and try it on the normal channel which had always produced a hum which I couldn't get rid of. That sounded great too, no more hum! Then I thought I would press it even further and jumper the TMB and Normal channels which had been unusable before above about 1/2 on the volume knob. No noise, no hum!!

Apparently the touch up on the transformer ground was all that was needed to get rid of the hum. I thought I had done that before but I guess not. Now I can honestly say that I have THE perfect amp for what I do!!!