I have searched RAS for this topic and could not find specific answers so ...

The local club here in Northern Utah has acquired a new Grob Twin Astir with a Terra TX720 radio installed. The radio is working but the On/Off and volume switch has flat spots and we would like to replace it.

Does anyone have the schematics for this radio? Or does anyone know the exact switch that is needed (no markings on the existing switch).

Thanks in advance

Ron Gleason