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  #1  
Old 22-12-17, 02:03
David Dunlop David Dunlop is offline
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Default Wireless Set No. 52 Canadian - Project

Well I never said I was the smartest person on the planet and waiting over 30 years to even consider starting a project like this definitely pushes me rather firmly to the other end of the spectrum, but…here we go.

The goal of this project is to assemble a complete basic Wireless Set No. 52 Canadian, restore all the bits to working order and then get it back on the air.
The attached photo shows quite clearly what I am starting with in my Wireless Room... nearly nothing. I say nearly, because the observant among you will notice there is a canvas bag hanging on the wall that I only learned recently is actually the Aerial Bag for the 52-Set that holds it's F Rods. It currently holds the two sets of said rods for my two 19-Sets so will soon need a No. 2 Brown set of F Rods added for a 52-Set. In any event, this little canvas bag, for better or worse, is my starting point.

Clearly, updates on this thread have the potential to be few and far between, but it is what it is. May the Wireless God smile upon me!

David
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  #2  
Old 26-12-17, 20:09
David Dunlop David Dunlop is offline
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Well a quick look in the canvas Aerial Bag revealed three 'F' rod Sets. One green and two in No. 2 Brown, so both my 19-Sets and any future WS-Set No. 52 are covered.

I was feeling pretty good about that, and then this arrived in the mail. Yes, it is a Wireless Set No. 52 Canadian Main Receiver.Serial Number on the Data Plate is 8349. I didn't realized they had run that high.

Initial observations show the Slow Motion Drive assembly for the Frequency Dial is missing. I think this item is identical to the one used on the 19-Set Mk III, so I should be able to track down a complete one with mounting screw. Also noticed the PHONES decal that should run vertically to the right of the two phone sockets in the lower right corner was 'missing', but when shining a torch along the face of the panel, I can see it has simply been very professionally painted over.

There is no sign the three pocket watch holder screw holes have ever held a watch holder, front or back of the panel.

The only truly odd thing about the panel at the moment is that it has three chassis pull knobs, rather than the usual two. What appears to be the third pull knob has been mounted between the meter and frequency dial assembly. Further investigation will be needed on that one.

A quick internal look shows the usual amount of dust accumulation, no noticible rust anywhere and all valves are in place, though as yet untested.

The other thing that popped out was I am going to have to identify the correct type of hardware used in the four mounting brackets when the receiver is secured into the Carriers No. 4. The few sketchy photos I have seen suggest that some form of low profile hex headed bolt was used. the heads look about half as thick as a standard hex bolt.

So I guess the adventure has now officially begun.


David
Attached Images
File Type: jpg WS-52 Cdn Main Receiver.JPG (268.9 KB, 12 views)
File Type: jpg WS-52 Chassis Rear View.JPG (367.1 KB, 5 views)
File Type: jpg WS-52 PHONES Decal overpainted.JPG (151.0 KB, 3 views)

Last edited by David Dunlop; 26-12-17 at 20:14.
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  #3  
Old 27-12-17, 19:47
David Dunlop David Dunlop is offline
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The two Zuss fasteners that hold the upper access panel of the receiver in place are made by a company called 'Airloc'. interestingly, the two on this receiver panel are the same shape, but one has the company name stamped into it in capital, block letters, with the number 160. the other one has the company name stamped in a written script style, with the number 150.

David
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Old 27-12-17, 20:00
David Dunlop David Dunlop is offline
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I took a closer look at the crystal calibrator setup in the 52-Set Receiver this morning and compared it to the crystal calibrator Marconi developed for the Wireless Set No. 19. As you can see, a very similar appearance between them, although the one for the 19-Set is much more compact.

Since, as I recall, the Mk I and Mk II 19-Sets lacked a slow motion drive for their tuning, and this finally showed up with the Canadian Mk III production, I wonder if this slow motion drive was adopted directly from the 52-Set design from Marconi, and pushing this curiosity back a bit further, did any of the Wireless Set No.9 series have a built in crystal calibrator and slow motion tuning drive? Just thinking these two items might have been part of the upgrades Marconi had developed for their Wireless Set No. 9 Mk III that became the 52-Set.

David
Attached Images
File Type: jpg WS-52 Calibrator Controls.JPG (202.6 KB, 2 views)
File Type: jpg WS-19 Calibrator Controls.JPG (188.9 KB, 0 views)
File Type: jpg Calibrator Chassis Comparison.JPG (237.3 KB, 0 views)
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  #5  
Old 28-12-17, 01:53
Chris Suslowicz Chris Suslowicz is offline
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Quote:
Originally Posted by David Dunlop View Post

Initial observations show the Slow Motion Drive assembly for the Frequency Dial is missing. I think this item is identical to the one used on the 19-Set Mk III, so I should be able to track down a complete one with mounting screw.
The drive assembly is in multiple parts, and semi-common to a number of sets.

The spring and its mounting bracket is the same as used on the WS18 and WS19 - one of those "multi-purpose part" items.

Either of the drive assemblies (single knob as used on WS19 Mk.I or Mk.II, or the later "dual knob with reduction drive" as fitted to the Mk.III) will fit.

It's somewhat of a fiddle to fit the drive assembly (possibly why yours is missing - once removed it's awkward to re-fit), as there's a actuator rod that is part of the Flick mechanism that needs to engage with the drive mechanism to force it downwards when the flick lever is set to FLICK, thereby disengaging it from the rim of the dial plate.

The "Condenser Drive Assembly" is something of a bugger to work on, and usually was supplied already attached to the replacement condenser to save time, effort, and a lot of swearing on the part of the wireless mechanics.

Chris.
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Old 28-12-17, 02:53
David Dunlop David Dunlop is offline
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Thanks for jogging my memory about those Flick systems, Chris. It has been a long while since I swapped out a 19-Set front panel and I had forgotten about how integrated the tuning drive and flick linkage is behind the panel. Also very hard to see everything in back.

I checked the linkage and noticed the lack of tension in the flick lever, as well as the fact the two frequency indicator flags were not moving fully back and forth. Hopefully, everything behind the scenes is still there and just missing the drive assembly properly installed. Will know for sure once I disassemble the complete dial assembly and get a better look. Hopefully, if anything is found missing, it will match up with 19-Set bits.

Hope Father Christmas was good to you.

Cheers,

David
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  #7  
Old 29-12-17, 06:42
David Dunlop David Dunlop is offline
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Chris. I took a quick look behind the panel and discovered both Arms, Flick Control No. 1 and No.2, with all their related hardware are there and intact.

It is the Arms, Flick Control No. 2 that travels down to engage the dial drive assembly. When the drive assembly is removed, the No. 2 Arm is under tension from it’s Hair Spring which causes it to swing up to the left (looking at the front of the panel) up behind the large dial wheel. If you are not aware of the No. 2 Arm being there in the first place, it is hard to find.

You are correct, it is a bit of a trained octopus job getting the No. 2 Arm back down to the bottom right side of the Drive mounting hole and keeping it there while you get the stud on the drive to engage its slot on the Arm, engage and apply tension to the Drive Spring and keep all of that in place while running the mounting screw home.

Worth at least two pints when you’re all done!

David
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Old 02-01-18, 06:26
David Dunlop David Dunlop is offline
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I have started to notice the vast majority, if not all, of the wiring in this receiver is white loomed, with or without tracers. I have also noticed the circuit diagrams I have so far, show little or no loom identification on them, as compared to the 19-Set circuit diagrams. By comparison as well, the 19-Set wiring was very much multicoloured, with or without traces.

Where colour references show up so far appears to be limited to the terminal layouts for the various switch wafers, and I am assuming these colour references simply mean the tracer colour. Am I correct in this analysis?

There is a lacquer coating over much of the wiring which has yellowed somewhat over time. And of course, some of the wiring has yellow tracers on it. Gets a bit challenging in some locations identifying plain white wiring and white with yellow tracer. Yikes!

David
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