Just read the bias sticky thread. Looks like the trim pot added to the amp is definitely a bias adjust. Still wondering about the hot glue blob. I’ve been looking at some photos of other rectors and they appear to show a solid wire bent at a right angle in that spot. Mine appears to be sticking...
I just bought this ‘93 Dual Rectifier on Reverb and when I looked in the back I noticed that the Power Transformer has been replaced with a Mercury Magnetics Axiom (10/08). The listing for the amp didn’t state this of course.
https://i.imgur.com/UkCLpYd.jpg
https://i.imgur.com/FN5ZlG2.jpg...