Simmons SDS 9 refurbishment

So instead of saving up my pennies for the fittings for my novelty clear arcrylic drum kit, I've gone and bought an electric drum kit that was produced the same year Jenna was born (1985). Introducing the Simmons SDS9.

I've really got to get rid of those stickers.

This kit came in pretty unloved condition, and much of the hardware was poked. Still, the brain works fine, though the "mix" knob was broken off, and the headphone and mix output sound like arse. I figured it was time to put my electronic engineering training, and ready access to tools at my work to use, and refurbish this beast during my lunch breaks.

 A very dirty, dinged up SDS 9 brain.

First up, I had to take it apart. I took lots of photos while I did this to make sure I could remember how to put it back together.

I then vacuumed out as much dust as I could.

Below left is the broken mix output knob. Notice how it doesn't have a "shaft" like the one on the right.

I took it off by snipping the legs with wire cutters, and then de-soldering the legs from the board one by one. I identified it as a 100K linear potentiometer. Then it was off to to find a replacement.

This was about all the time left in my lunch hour, though still had enough time to carefully give the faceplate a scrub with some good ol' detergent and water. Next up, soldering in a replacement potentiometer and testing.


  1. Electric resistance welding
    The world owes the invention of electric resistance and spot welding to Englishman Elihu Thomson. This engineer has several patents in the field of spot welding to his name.

    Electric resistance welding consists in assembling by autogenous fusion the parts to be welded under the pressure of two metal parts. Who says welding says heat, with resistance welding the heat necessary for welding is provided by the Joule effect (which is the thermal manifestation of electrical resistance, this heat occurs when an electric current passes through any material conductor) of a current of high intensity and low voltage, passing through the parts to be assembled. Indeed, it takes a lot of amps and little voltage. The application of a forging force makes it possible to ensure the metallic interpenetration.



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