I had further thoughts, and went through the Wireless Set No.52 manual for the Truck & Ground Station, as lots of parts are common to the WS19 Canadian....
Kit No.1 contains "Leads, Aerial No. C7" which connects the WS52 sender and receiver (and is the one David Dunlop had to manufacture for his WS52).
Kit No.2 contains two of "Aerial Lead ASSY C1", which connect the Aerial Tuning Coil No.2A to the Aerial Base C2 in the vehicle, and also Leads, Aerial No. C6 which connects the sender to the Aerial Tuning Coil 2A (that lead (C6) is included with the coil.
Kit No.3 which is mostly accessories for the mast kit contains ZA/C 10318 Leads, Aerial No.5 and a second Leads, Aerial No. C6 - this time to plug in to the socket on Aerial Base C2 and link it to the terminal on the mast when that is used on the vehicle roof.
The section dealing with the setting up of the ground station advises picking the site for the mast first, then erecting the wireless tent, making sure the table is close enough for the Leads, Aerial No.5 to reach from the set to the terminal on the mast. That lead is 6 feet long, so the tent will be tucked up close to the mast and within the circle of guy ropes.
The WS52 manual is an entertaining read, as long as you don't have to carry out some of the steps: the table must be capable of supporting 270 pounds. "Lift the Set onto the table. If it seems that something more than gravity is working on the Set, have courage; it weighs 255 pounds."
Anyway, it looks like the Aerial Leads were common to multiple sets and eventually got redesignated as "Connector, Single, No.?" to make life easier for the ordnance stores and reduce duplication of stock.
Chris.
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