Originally Posted by red58
the coil 'spring' is not coated with anything, it needs to dissipate heat and is mounted on ceramic, one style for example

Bill
Bill,

I'll see if I have a decent switch that still has the ceramic. This is not they right style switch, but some of my 47-55 switches still have ceramic remaining. The coil goes around a ceramic cylinder and there was a coating on the outside (you can some some of the exterior coating chipping off of the coil at the link above).


Maybe Brad or someone has a NOS switch and can post a photo of the resistor coil?