[Milsurplus] Elcetronic schematic for a Plessey PTR175 Transceiver

[gm0kzx at blueyonder.co.uk]

I wonder if any of your readers could point me in the direction of
obtaining a Electronic Schematic for the Plessey PTR 175 aircraft
Tranceiver. They are quite old about 1960 and I believe that thye were a
copy of a Collins ARC52 tranceiver
Thanking everybody

Barrie P Spink GM0KZX