Wireless Set No. 52 Canadian - Project

[David Dunlop]

The second step in removing the Coil chassis from its case is to find the three leads, pointed out at the end of the last post. They are all 3/16-inch braided and tinned copper loom with ring terminals on the ends connected to the two wing nut terminals at the bottom, either side of the case, and the Lead In Terminal on the upper left side of the case (when viewed from the front). All of the electrical items on these three fittings are zinc, or cadmium, plated brass. A 3/8-inch spanner is probably the best tool for removing the hex nuts on these three fittings. The access to the Lead In Terminal is quite tight and the refitting of the hardware will be the most challenging with it.

I am not certain what sort of lock washer is supposed to be used on these three terminals. There was none on the Lead In Terminal, probably because of the limited access. The wing nut terminal below the Lead In had an external toothed lock washer that looked a bit too large to do the job. The wing nut terminal across from it had an internal toothed lock washer that seemed quite at home there. And, of course, none of this hardware has survived on my parts Coil assembly.

The first two photos show the before and after views of this hardware removal.

The last photo today shows the locations on the bottom of the Coil case where the three screws with flat washers are to be found. these come into play with the third step.

While we are here, however, take a look at the set of brass gears in the tuning mechanism on the centre left side of these photos. They have accumulated a coating of green copper salts since the sets 1966 overhaul, but the rest of the chassis and interior of the wooden case appears remarkably free of any other oxidation, or damp rot in the wood, and as I noted before, this Coil assembly performs perfectly electronically.


David