Installed a choke to make the amp more like the Soldano it's a clone of. And since the standby switch on these amps is a little strange, I installed a large resistor across the switch terminals to give the amp a "soft" startup.
I also added a flyback diode across the choke to protect the switch and reduce popping.
These amps tend to come over-biased from the factory, so I stuck a bias adjustment potentiometer in the amp for easy adjustment.
The amp didn't have any screen grid stoppers so I added a shared 470Ω stopper.
The rest of the mods were to the preamp and involved simple components substitutions to improve tone and reduce noise.
