19-Set Vario/Aerial Base Mounting Plate

[Patrick Johnson]

Here are the pictures providing all the dimensions of the retaining ring and bolt. The bolt head accepts a 5/16" socket. The third photo shows the bolts and lock washer combination used to hold the Control Unit to the mounting plate, its bolt head matches a 7/16" socket.
David requested the length of cable connecting the Variometer to the aerial, it measures a clear 4-1/4" between the metal fasteners at each end.
A question: is that likely Cadmium plating midway on the retaining bolt below the threads?

[David Dunlop]

Thanks for the photos, Patrick. That will be a big help.

Yes, the odds are quite high the hardware plating is cadmium. Very common up to the end of the war when zinc plating started to replace it. You can simulate the cadmium plating today with a good zinc plating. Hard to tell the difference when done right. Most shops just go for a quick galvanizing job which leaves an entirely different finish, that frosty dust bin crystal sort of look.

David

[Tim Bell]

My plate... possibly repainted?

WS19-1.jpg

WS19-2.jpg