[TMC] GPR-92 Schematic

[Edward Gable]

The museum is fortunate to have gifted a very nice TMC 1kW communication system including a GPR-92 as one of the receivers.  We have documentation for the exciter, PA and antenna coupler, but nothing on the receiver(s).  The GPR-92 doesn't work on the higher frequencies which points to the double conversion circuitry not functioning.  Can anyone help with a source for a GPR-92 schematic ?
Thanks and Happy Holidays,

Edward M. Gable  K2MP/W2AN
Curator, AWA Museum
www.antiquewireless.org