12-07-2011, 07:01 PM
The Westector will require a fixed minimum voltage level in order to overcome forward resistance and conduct - as any diode will. We are not talking huge amounts here, but I'd guess around a volt or more. AFAIK the device is based on metal-oxide rectifier principle. A more sensitive diode might be a germanium type. However, before doing anything with the detector I'd check the HT voltage level, then the valves up the front end (voltages, emission) and see if decouplers and resistors are within spec. Also look to see if alignment has been tampered with by persons unknown wielding screwdrivers. I've restored several of these sets and in no case has the Westector been at fault. Not that it can't be this time, of course.
-Tony
-Tony
