Princeton Reverb Problem

[gls500]

Gents-

I have a '71 Princeton Reverb that I've been working on lately, and today at lunch I decided to replace the reverb transformer that was causing some nasty fizzy/distortion issues the amp had at high volume. I was relieved that when I powered it back up, the reverb sounded great, and no distortion issues.

The catch - I somehow took out the tremolo on it. When I have both tremolo knobs set off, the amp sounds fine. Once I turn one up, I get a quick drop in volume and brightness, a slight hum, and a barely-noticeable volume modulation. I tried replacing the tube for the tremolo (which the reverb uses half of, and didn't make sense anyway) with no luck. I also noticed that the power tube closest to the phase inverter started to turn bright red. I quickly shut it off.

I looked over things and don't know what I could have screwed up. It worked fine before I replaced that reverb transformer. Any ideas?

Thanks for any help.

[gls500]

Well it looks like it was the power tubes. I popped in some older tubes, and it works fine. I must have banged around the tubes in there while working on it - dangit! I put the first ones back in, heard a good "pop" then a fizz, and that was the end of that. :)