Admiral 19A11

[Electronic M]

Originally Posted by MadMan

Actually if it's arcing inside the pot, the resistance wire winding inside is likely broken. Open to look anyway.

Unrelated, what is the radio in your avatar? I have one that looks exactly like it... except it's a 1970s reproduction and it's made of plastic. lol

Isn't the set they are working on electrostatic? Electrostatic sets typically use all carbon comp potentiometers because none of the control circuits are high current/power. Wire rheostats are typically limited to high current applications like electromagnetic focus, centering, and cathode resistance vertical linearly in mag deflection sets.

[Trainradio]

Originally Posted by Electronic M

Isn't the set they are working on electrostatic? Electrostatic sets typically use all carbon comp potentiometers because none of the control circuits are high current/power. Wire rheostats are typically limited to high current applications like electromagnetic focus, centering, and cathode resistance vertical linearly in mag deflection sets.

I got it apart. It's carbon. I don't see any burned or damaged areas. I'll clean it with deoxit, replace the two resistors attached to it that have drifted high in value and then reinstall. Wish me luck.

[Trainradio]

I reinstalled the control and everything seemed to be ok. For a while I had sound and a picture. The picture was out of focus but stable. Then something arced again and the raster disappeared. I guess I no longer have any high voltage. If anyone has thoughts or ideas they would be most appreciated.