Repair of two Hammond Leslie tube amplifiers (22H & 122) - part two

Here's part two of the repair of the Leslie amplifiers. The oldest one needed a new electrolytic filter capacitor, some old paper capacitors replaced, some defective resistors replaced, the diode in the relay control circuit replaced, the fuse and fuse holder replaced, the motor control relay replaced, the voltage regulator tube replaced, and an original style 5U4 rectifier tube was used to replace the solid state plug-in replacement that someone had previously used. The reason for this is because the B+ voltage was much too high with the solid state diodes and solid state diodes are more likely to short than a tube rectifier. I also cleaned the top of the chassis, as well as some burnt junk from where a resistor went up in smoke from under the chassis.

The newest amp was not in as bad of shape as the first. It had a blown fuse, a burned 470 ohm resistor, a leaky 50V zener diode (both 50V zener diodes were replaced for safety), a defective cathode bypass capacitor on the output tubes, and the cathode resistor on the output tubes was crumbling and was replaced.

All voltages in both units seem to be fine and the units seem to be working OK. The final test will be when they are installed back into the cabinets. If you see another video on these, you'll know there was a problem. Otherwise, everything will be fine.