Help identifying vintage dual resistor MSC...

[b027]

Hey there!

I've been lurking for a while, and have recently gotten back into my RC10's. Now I need some help - I picked up a box of vintage parts locally with RC10, Tamiya, and Kyosho parts, among others, and it included what appears to be a resistor based mechanical speed control, but I am unable to identify it. It appears to be a pretty standard looking resistor setup, except for the attached heat sinks on both ends and the wrapping around a second resistor stacked together. Plus there
s a relay on the end, for unknown purposes... maybe switching directions? Quite an interesting configuration!

My best guess is it is from Parma, and seems to relate to some older slot-car electronics based on the wiper arms and wiring connection points that I've seen elsewhere online.... but I really am unsure. Besides some component coding on the black relay, The only identifying mark is a handwritten "8/10" (or "01/8"...?) on an uncoated part of the resistor.

Any insights???

I'd love to know more - it looks really cool and different from anything else I remember seeing!

Thanks for any help!!!

[radioactivity]

I think you guessed correctly.
https://www.rc10talk.com/viewtopic.php?f=82&t=30774&p=323085&hilit=parma#p323085

Chuck

[morrisey0]

https://www.rc10talk.com/viewtopic.php?t=41548

[b027]

Thanks both! This is great information, especially the wiring diagram and instructions! Amazing

Any idea what the “8/10” might refer to?

Do you know where these were typically used? I don’t think I’d run it, but would consider a shelf build if I had an appropriate project car...

Cheers