Wireless Set No. 52 Canadian - Project

[David Dunlop]

First thing this morning, I started cleaning the lower left and right front panel mounting brackets and hardware and get them into the zinc plating bath. Once that was out of the way, I installed the Right Side Mounting Plate to the bottom of the coil case.

In the second photo here, you can clearly see the longer front 8-32 machine screw used at the front of the plate in order to fit the grounding strap. There is a depression in the countersunk ho;e here which gets filled by a flat washer that gets dropped down over the machine screw before the grounding strap is fitted. If that space is not levelled off, the brass grounding strap will get pulled down into the depression when its hardware is run home. Under the stress, the brass strap eventually fails and snaps. The one on this coil. did because no washer had been fitted, but the grounding strap on my parts coil was in perfect shape and had the missing washer.


David

[David Dunlop]

The installation of the grounding strap and lower right front panel bracket were pretty straight forward. The one thing to be wary of, however, is that over 80 years, the holes in the wooden case for the hardware have dried out and this results in slightly larger holes the hardware feels a bit sloppy in. I used a small square block of wood held against the face of each front panel bracket to keep the brackets square to the case at the hardware was tightened. this will ensure the holes in the brackets line up properly with the front panel hardware when that assembly gets reinstalled.


David

[David Dunlop]

The centre upper and lower front panel mounting brackets have now been cleaned, re-plated and reinstalled.

The last two for this part of the project are the upper left and right brackets and hopefully;;y I can get them done on the weekend.


David

[James D Teel II]

Beautiful work as always.

[David Dunlop]

Thanks, James. I am happy I can still at least muddle along.

Today I got the last two front panel mounting brackets cleaned, zinc plated and reinstalled in the upper corners, so I am now finished with that bit, but still have a little new research to sort out, hopefully in the next week or so.

In the meantime, I plan to work on the two Aerial Input Terminals, located on the lower rear sides of the case. Both seemed OK when I disassembled and removed them last year, but it's time for a closer look.


David

[David Dunlop]

I got the right side Input Aerial Terminal disassembled cleaned and re-plated this afternoon. The main component of this assembly shows up in the Master Parts List as:

STUDS, Brass, Special, ANF 10-32, 1-21/32 inches long, No. C1 ZA/CAN 8048

It is machined from 1/4-inch brass bar stock and once the wing nut is fitted, the end of the threaded shaft is mushroomed slightly to prevent loss of the wing nut. It would have been easier to deal with the shaft being drill through and a small D-Ring fitted, as you have to carefully press this stud assembly out of the brown phenolic resin plate it is fitted to in order to get the entire assembly free from the coil case.

I discovered the rear edge of the resin plate showed signs of the bcd saw blade bucking when the plate was cut, leaving some light tan marks on the edge. A thin coat of clear nail polish reduced the visibility of these marks by about 50 % so I was pleased you can still notice the damage but not so glaringly any more.


David

[David Dunlop]

I was able to reinstall the right side Aerial Input Terminal last evening and once the Stud assembly with its captive wing nut was back in place, made an interesting discovery.

I had assumed the mushroom effect applied to the tip of the shaft the wing nut moves on was simply achieved by a sharp rap with a hammer. However, as you can see in the photo of this assembly back in place, the newly cleaned and re-plated tip of the shaft revealed it had been struck with a small cross punch to achieve the mushroom effect. I was pleased another little detail finally came to light...literally.

Hopefully, I will be able to clean, re-plate and reinstall the Aerial Input Terminal on the left side of the coil case today.


David