WS19 - Antenna Base fittings

[Chris Suslowicz]

Originally Posted by Chris Suslowicz

Right now I need sleep, I'm up at Oh God o'clock to go to Beltring.

...and having got up at the appointed time only for the worthless bus company to fail to operate to the timetable (bus missing, next bus will get me to the railway station after my off-peak train ticket has expired, thus wasting 4 hours before it's valid again). I am excessively grumpy this morning.

That said, I have worked out what the 'packing washer' is for: it's square and supplied curved so that it allows the nut that secures aerial feeder to be tightened far enough that you can bend the tab on the locking washer without stripping the thread on the nut or pulling the tube out of the plate.

So, you want (from inside the tank):

Variometer.
Aerial Feeder No.4
Variometer Adapter Plate
Plates, Packing
Variometer Adapter Washer
----- turret roof -----
Mountings, Aerial Base, No.1
Tabbed lock washer from Aerial Feeder No.4
Securing nut (ditto)
Aerial pigtail (fit to aerial base first, then to end of aerial feeder)
Aerial Base No.8 or the rather better No.10
6 hex bolts and spring washers to secure aerial base (1/4-in BSF, I think).

It's possible that the adapter plate and packing plate go on in reverse order, but the adapter washer goes into the large hole in the roof in order to centre the aerial feeder in that hole.

You may have to drill blind holes to take the locating peg for the variometer adapter plate inside the turret and the aerial base mounting on the outside.
(The installation print may have diagrams for this.)

Chris.