Here are Diagrams PC500-PC1000.
See also the main chassis diagram here.
To save any of these diagrams, right -mouse-click on it and choose "save picture as..".
PC500. The infamous PA!
PC600. Carrier oscillator.
PC800. Rx front-end filters (180).
PC900. Tx bandpass filters (180).
PC1000/1020. Tx output filters (180).
