PR1553A Professional Receiver Regeneration - Repairs and Modifications
Technical article describing the complete restoration of a Plessey PR1553A triple conversion professional receiver. Details reconstruction of modules 10 and 11 containing 48 MHz and dual 10.6/10.8 MHz oscillators, power supply repair, and conversion of the Nixie tube display to seven-segment LED display. Includes circuit diagrams, PCB layouts, photos of completed work, and testing results. Appendix contains detailed logic circuit descriptions for the display system.
