Seymour Duncan Hot Mod Preamp Module

I have been able to complete this page thanks to Alan Ezersky who has sent me the factory schematic for this module. Thanks!




The Hot Mod has two controls mounted on top of the module, a volume and a gain control.

There is a high power MOSFET mounted on the back side of the module, and a 1-3/4"x5/8" heat sink to cool it.

The PCB is double sided, with most of the components surface mounted on the internal side of the PCB. Volume and gain controls are 250K trim pots. The module is apparently powered by B+ voltage, which is approx. 360 to 400 VDC.

Overall, I am impressed with the quality and design of this module, compared to the workmanship on some of the other modules I have seen. Nice piece of engineering on Seymour Duncan's part.
Due to the complexity of this module, I have not attempted to make a PCB layout or schematic, as it is not a DIY-friendly module.