[Premium-Rx] Schematic for PM674 Main IF/AF board - Racal RA1778/RA1772

[John Graham 02]

Hello,

Can anyone provide a scan or photocopy of the schematic and layout for the PM674 Main IF/AF board used in later Racal RA1778 and RA1772 models? 
The RA1772 and RA1778 pdf manuals available online only have diagrams for the older PM364 board, which uses a different chipset.
I did buy an RA1772 manual from Telford Electronics some years ago and that has a description of the PM674 board in Vol 1 (dated 1980), but unfortunately Vol 2 is dated 1976 and only covers the earlier version. If you have Vol 2 (1980) it will probably have the info I  need.

The PM674 has two uA747 chips.

thanks,

John G.