This is the predecessor series to the R-1051, T-827, RT-618, URC-35, WRC-1 line of equipment.

Thanks to an eBay find, I have scanned and added manuals for many of these as well as General Dynamics' report on the development of the URC-35 and WRC-1

I've also added GD's proposals to add 100cps tuning (original R-1051/T-827 was 500cps) and to add 12kc bandwidth (to support 4ISB operation).

Cheers,