MLU FORUM  

Go Back   MLU FORUM > GENERAL WW2 TOPICS > The Wireless Forum

Notices

Reply
 
Thread Tools Display Modes
  #31  
Old 14-01-18, 01:19
David Dunlop David Dunlop is offline
Registered User
 
Join Date: Feb 2006
Location: Winnipeg, MB
Posts: 1,593
Default

Hi Chris.

Downloading the 2/4 EMER for the 52-Set is on my Must Do list Monday evening when my 2 week probation is up. I have the equivalent 19-Set publication which also covers the same Flick Assy and I know I have disassembled quite a few on the 19’s years ago. I used that publication as my reference and ‘I think’ it covers reassembly, but it has been a while.

With regards to the Connector on the rear of the receiver missing its R-Clip, if you have spares to spare that would be a big help. Thanks.

I must revisit my parts bins again soon. I am sure I have other items tucked away, but cannot recall what. Never know what common items from the 19-Set might fall out of a bin and be shared with the 52-Set.

David
Reply With Quote
  #32  
Old 14-01-18, 20:11
David Dunlop David Dunlop is offline
Registered User
 
Join Date: Feb 2006
Location: Winnipeg, MB
Posts: 1,593
Default

A couple of Sunday morning observations.

It appears these receiver chassis were inspected at a standard inspection station that used a steel stamp punch to verify the inspection. I have found this 5/16 inch stamp on the outer left and right chassis side panels on both the main set receiver and the remote receiver. these two units are roughly 2,000 apart by serial number in Marconi's 1944 production.

The other interesting discovery relates to the Crystal Calibrator chassis in the upper left corner of the receiver. If you check back at the photo in Post #4, you will see a large daub of blue paint on the calibrator chassis at the left end of it. I found the remains of a similar daub on the Remote Receiver calibrator chassis.

This mark was applied at the factory to denote that all the valves in the calibrator have been 'aged'. That means they have been run for 12 hours to ensure the electrons will feel right at home in the valves when they are put to work. In addition, the receiver manual notes that Marconi has aged all essential and spare calibrator valves issued with the set. These valves have also been marked with a blue dot of paint on the end of the locating pin.

Whenever a valve has been replaced in the calibrator, the calibration test needs to be performed. With an aged replacement valve, this test can be done straight away. If the valve has not been aged, the calibrator needs to be run for 12 hours before the test can be performed.

David
Attached Thumbnails
WS-52 CMC 22 Inspection Stamp.JPG   WS-52 Calibrator Valve Aged Mark.JPG  
Reply With Quote
  #33  
Old 14-01-18, 23:37
Chris Suslowicz Chris Suslowicz is offline
Junior Password Gnome
 
Join Date: May 2007
Location: England
Posts: 428
Default

Quote:
Originally Posted by David Dunlop View Post

With regards to the Connector on the rear of the receiver missing its R-Clip, if you have spares to spare that would be a big help. Thanks.
David
Consider it done.

Looking at the photo of the broken screw, I suspect the culprit attempted to undo it using a screwdriver. This is a mistake, as all the screw slots are in-line with the contact slot (twisting the screwdriver would deform the contacts) and the obvious assembly/disassembly method is with a box spanner or nut spinner on the rear of the connector. (Also the nuts are sealed with varnish, so may be very hard to undo without applying a suitable solvent (or heat) first.)

Chris.
Reply With Quote
  #34  
Old 15-01-18, 01:19
David Dunlop David Dunlop is offline
Registered User
 
Join Date: Feb 2006
Location: Winnipeg, MB
Posts: 1,593
Default

Thanks, Chris. Much appreciated. PM me if you need my address.

I was wondering about that broken screw as I could see they were visible inside the clips, but a screwdriver would have to be forced into the clip to access the screw, which struck me as a very unfriendly thing to attempt to do to the clips.

You have now confirmed my suspicion that the back door to the Connector Plug is the best avenue of approach.

David
Reply With Quote
  #35  
Old 15-01-18, 08:54
Bruce MacMillan Bruce MacMillan is offline
a Canuck/Brit in Blighty
 
Join Date: Jul 2004
Location: Hell Fire Corner, Kent UK
Posts: 524
Default

When I restored my Canadian Marconi CM11 I noticed it used the same connectors. Males were on the cabinet back & females on the equipment.

Jerry Proc restored the same equipment on HMCS Haida and may have or know of where spares may be on your side of the pond. http://www.jproc.ca/
Attached Thumbnails
CM11_connector.jpg   CM11.jpg  

Last edited by Bruce MacMillan; 15-01-18 at 19:54.
Reply With Quote
  #36  
Old 20-01-18, 00:26
David Dunlop David Dunlop is offline
Registered User
 
Join Date: Feb 2006
Location: Winnipeg, MB
Posts: 1,593
Default

A nice surprise today. I was giving the innards of the Remote Receiver a closer look and a bright, shiny object suddenly caught my attention. It was the Gas Filled Discharge Gap that was missing from its clips at the Aerial terminals, stuck between two of the calibrator valves.

Cleaned it off and took the attached photo before clipping it back into its proper place. It measures 2-5/16 inches long and 7/16 inch diameter at the caps. The only markings on it are "PATT. 3841" stamped into the sides of each end cap.

David
Attached Thumbnails
WS-52 Gas Filled Discharge Gap B.JPG  
Reply With Quote
  #37  
Old 20-01-18, 02:18
David Dunlop David Dunlop is offline
Registered User
 
Join Date: Feb 2006
Location: Winnipeg, MB
Posts: 1,593
Default Modification Card Holder

While giving a closer look to the Remote Receiver today, a piece of beige paper revealed itself trough a circular hole on the left side of the chassis. While looking at it, I noticed a pattern of four screws, above and bracketing this hole. I had seen that pattern before and it took a while to register exactly where. It was on either the side, or rear B-Set chassis plate on my 19-Sets. It was a Modification Card Holder and this one on my Remote Receiver clearly held a card.

I was delighted when I removed the card to find it confirmed the Serial Number of the Remote Receiver as being '7746'. Three modifications were done to the receiver on 10/03/61 (I can never remember the Military Day/Month sequence on these things but interesting the work was done in 1961).

'F257' is probably the reference code for the 52-Set Cdn, and if that is correct, at least six modifications exist and the three noted relate to the receiver.

This prompted another look at the Main Set receiver. Sure enough, the Modification Card Holder was there, but I could not see a card initially. However, when I shone a flashlight down into the top of the holder, I could see something was there. This resulted in a quick raid of my lovely wife's sewing room. A possible tool was found. A return to the receiver and an insertion of the tool pulled out a modification card. (Who knew a crochet hook could be so handy!) A different pattern mod card than the other one. Much stiffer paper and when folded over in the holder it stayed put. Interestingly it shows the chassis Serial Number to be '8356', as opposed to the plate on the front of the receiver being '8349'. At the moment, my gut is going with the Mod card. It was firmly in place in its holder and invisible. More likely the data plate was replaced or the entire upper front panel of the receiver.

Only one modification was performed on this receiver on 01/12/52 - F257/#1.

Be interesting to find a record of these modifications.


David
Attached Thumbnails
WS-52 Mod Card Holder Mounts B.JPG   WS-52 Mod Card Holder Mounts C.JPG   WS-52 Remote Receiver Mod Card.JPG   WS-52 Mod Card Holder Mounts A.JPG   WS-52 Main Receiver Mod Card.JPG  


Last edited by David Dunlop; 20-01-18 at 03:18.
Reply With Quote
  #38  
Old 20-01-18, 03:35
Wayne Hingley's Avatar
Wayne Hingley Wayne Hingley is offline
Registered User
 
Join Date: Aug 2015
Location: Water Valley, Alberta
Posts: 396
Default

Quote:
Originally Posted by David Dunlop View Post
...Three modifications were done to the receiver on 10/03/61 (I can never remember the Military Day/Month sequence on these things but interesting the work was done in 1961).
Nice couple of finds David. I believe the date format is dd/mm/yy. That was the format used on the RCEME engine rebuild tags anyway (at least the ones I have seen).
__________________
1953 M37 CDN
1953 M38A1 CDN
1967 M38A1 CDN2
Reply With Quote
  #39  
Old 20-01-18, 19:56
David Dunlop David Dunlop is offline
Registered User
 
Join Date: Feb 2006
Location: Winnipeg, MB
Posts: 1,593
Default

Does anyone have an original condition Carriers No. 4, or Remote Receiver Case in the No. 2 Brown colour?

My Remote Receiver case has been refurbished in postwar NATO Gloss Green, and was completely painted inside and out. I am curious if these two items were completely painted, inside and out, at the time of manufacture, or if the interiors were only painted as far back as the overhang that protrudes beyond the face panels of the main components.

And while I think of it, was the C-Broad Arrow stamp applied anywhere on the outside of these two items? And in what colour?

David
Reply With Quote
  #40  
Old Yesterday, 18:30
David Dunlop David Dunlop is offline
Registered User
 
Join Date: Feb 2006
Location: Winnipeg, MB
Posts: 1,593
Default

Thanks for the date confirmation, Wayne.

On looking at the two Mod Cards again, I realized two different numbers were referenced: F527 and F257. One of those has to be a brain fart.

Looking at my two receivers over the weekend, I have decided to focus first on restoration of the Remote Receiver. Foremost, it is electronically intact and also cosmetically very good looking. The chassis will need a cleaning and an inspection/testing of all valves and should then be ready for a careful feeding of electrons. The case needs a few repairs but they can wait until I get the correct painting information sorted out. I will also benefit by becoming more familiar with the receiver chassis before I have to tackle the more serious switch damage repairs in the Main Set Receiver.

I was able to download and print out a copy of the Parts Identification List for the set on the weekend. An absolute goldmine of information for a project like this.

David
Reply With Quote
  #41  
Old Today, 00:59
Tim Bell's Avatar
Tim Bell Tim Bell is offline
Registered User
 
Join Date: Oct 2012
Location: Tamar Valley, Cornwall
Posts: 514
Default

Epay - not mine... ws52 remote receiver psu...

https://www.ebay.co.uk/itm/WW2-Canad...wAAOSwDFBaS4UL
Reply With Quote
  #42  
Old Today, 02:56
David Dunlop David Dunlop is offline
Registered User
 
Join Date: Feb 2006
Location: Winnipeg, MB
Posts: 1,593
Default

Thanks, Tim. I will check it out.

David
Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
Canadian staff car wireless: World War 2 Canadian R103 Receiver Demo Mike Kelly The Wireless Forum 5 24-07-16 16:20
Found: CMP Wireless body project Jim Burrill For Sale Or Wanted 7 05-04-15 01:02
Canadian dehavilland mosquito restoration project David Dunlop WW2 Military History & Equipment 9 10-07-14 01:51
Canadian project David Ellery The Carrier Forum 9 28-04-07 02:36
FOR SALE/TRADE: 1944 CHOREHORSE PROJECT for Signal Corps Wireless Power Unit Project Alain For Sale Or Wanted 1 21-02-07 01:11


All times are GMT +2. The time now is 21:55.


Powered by vBulletin® Version 3.8.4
Copyright ©2000 - 2018, Jelsoft Enterprises Ltd.
Copyright © Maple Leaf Up, 2003-2016