If anyone is interested, here's another Stoner from the outfit which sold #367 to me:

http://www.ebay.com/itm/Stoner-PRO-4...item2a38643653

Note the blank display - all the actual counter digits are out. The illuminated digits are hardwired, so we can infer the +20, +12 and +5v supplies are working. That leaves the +2v supply for the counter displays and possibly the +9v supply for the balance of the radio. Next to the "H" on the display - which is normally a "-" if the radio isn't being run in 'export' mode - is the decimal point for the PLL out of lock indicator.

The worst thing that could be wrong with the radio is a bad microcontroller - a custom-programmed 'Nitron' chip. I know of a source for them. My SWAG leans toward the latter two supplies being out.

Not a bad deal for an apparently easy fix and the radio looks to be in nice enough cosmetic shape to warrant its purchase.

I'm looking into ways to address the ~1.5KHz drift of the reference oscillator which occurs from the point of power-on until everything comes up to operating temperature.