One operating position is ready – position B which has the control unit for all antennas. Some work remains, dressing cables, installing computers and building brackets for Bandpass Filters etc.
I have a few of these high power relays, but the relay voltage is unknown and it is not marked.
The relay coil measures 10 ohms.
I intend to use them for Rhombic direction switching.
Measurements with a variac revealed that the relay switches around 60 VAC and is comfortable at 110VAC drawing 0.8A without coil heating.
I acquired a Philco Construction Handbook on Communications Antennas, dated 1951 on eBay.
Inside is this wonderful drawing.

Completed Rhombic
