MLU FORUM  

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

Notices

Reply
 
Thread Tools Display Modes
  #1  
Old 21-10-13, 19:12
David Dunlop David Dunlop is offline
Registered User
 
Join Date: Feb 2006
Location: Winnipeg, MB
Posts: 3,397
Default RCAF Wireless/Communications Equipment

Does anyone know if the RCAF maintains a museum anywhere dedicated to this equipment, or do they have a Directorate of History anywhere that would have references to equipment used/manuals for same?

I have an ex-RCAF Communications Receiver, which RCA ID'd as an AR88LF for the Army during World War II. The identical receiver in RCAF use was known as the GR-17 Communications Receiver. This set was built exclusively by RCA Canada in their Montreal plant during the war. The set would have been issued with an RCA published manual for the AR88LF, but apparently the RCAF also produced their own manual for the same set. This RCAF Manual was identified as:

EO 35BB-5GR-17-x

GENERAL PURPOSE COMMUNICATIONS RECEIVER INSTRUCTIONS


I haven't a clue how to decode the alphanumeric reference other than it contains the GR-17 ID and the last two characters '-x' would relate to the version/edition.

I have only seen a few very old thermal transfer onion skin photocopy pages from this manual. It would appear to be an 8.5" x 11" looseleaf format that included some update pages from 10 April 1961 and 23 May 1961 coded EO 35BB-5GR-17-7.

The RCAF used some of these sets in an Intercept Monitoring Station close to the Whitehorse Airport during the war and probably into the Cold War at some point.

David
Reply With Quote
  #2  
Old 22-10-13, 17:19
Bruce MacMillan Bruce MacMillan is offline
a Canuck/Brit in Blighty
 
Join Date: Jul 2004
Location: Hell Fire Corner, Kent UK
Posts: 704
Default

Hi Dave,

Have you tried VE3CWM at the Diefenbunker? They have a working GR17 on display and may have a manual.

Bruce
Reply With Quote
  #3  
Old 22-10-13, 18:40
Bob Carriere Bob Carriere is offline
Moderator
 
Join Date: Mar 2003
Location: Hammond, Ontario
Posts: 5,210
Default If you go that route....

Stuart Fedak in Ottawa may be able to facilitate things for you.

Bob C
__________________
Bob Carriere....B.T.B
C15a Cab 11
Hammond, Ontario
Canada
Reply With Quote
  #4  
Old 22-10-13, 21:07
Dean (Ajax) Dean (Ajax) is offline
Registered User
 
Join Date: Jul 2007
Location: Ajax Ontario
Posts: 322
Default

I have been donating RCAF Radio Items to the Canadian War Museum, Aviation division for sometime, perhaps they can help you.

Dean
Reply With Quote
  #5  
Old 23-10-13, 18:06
David Dunlop David Dunlop is offline
Registered User
 
Join Date: Feb 2006
Location: Winnipeg, MB
Posts: 3,397
Default

Thanks for the suggestions, gentlemen. I will look into them. In the past, whenever I needed information on a Canadian Army related topic, I would write to the Directorate of History in Ottawa and they nearly always came through with something useful. I was not sure if they covered RCN and RCAF information as well, or if these two Services maintained their own history sections.

In the meantime, I have now discovered this set was apparently used in it's GR-17 guise by both the RCAF and the Canadian Army, so there must be some GR-17's out there with Canadian Army ID plates on them.

A couple of photos attached of my RCAF Receiver.

David
Attached Thumbnails
RCA AR88LF 1A.jpg   RCA AR88LF 2A.jpg  
Reply With Quote
  #6  
Old 25-10-13, 22:55
David Dunlop David Dunlop is offline
Registered User
 
Join Date: Feb 2006
Location: Winnipeg, MB
Posts: 3,397
Default

While I think of it, the second line of the RCAF Data Plate reads "SEC/REF. No.", which for this set happens to be: 10EU/5479.

Can anyone enlighten me as to what "SEC/REF. No." is and what it relates to? My current guess is that it might be a specific RCAF coding or identification system, and the 'REF." is probably short for "REFERENCE". The "SEC" baffles me.

David
Reply With Quote
  #7  
Old 26-10-13, 08:50
Bruce MacMillan Bruce MacMillan is offline
a Canuck/Brit in Blighty
 
Join Date: Jul 2004
Location: Hell Fire Corner, Kent UK
Posts: 704
Default

SEC/REF is Section/Reference number. In this case it is 10EU/5479.

Section number 10EU refers to valve type radio equipment and Reference number 5479 is the individual stores number for the receiver.

I believe this numbering scheme was began by the RAF and there are some references on the net as to what each section number means. There are quite a few section numbers.
Reply With Quote
  #8  
Old 27-10-13, 23:14
David Dunlop David Dunlop is offline
Registered User
 
Join Date: Feb 2006
Location: Winnipeg, MB
Posts: 3,397
Default

Bruce.

Thanks for that information. The word "section" actually came to mind while I was thinking about that data plate, but for some reason I ruled it out as "too easy" for a piece of military equipment. Silly me!


David
Reply With Quote
  #9  
Old 03-11-13, 16:26
David Dunlop David Dunlop is offline
Registered User
 
Join Date: Feb 2006
Location: Winnipeg, MB
Posts: 3,397
Default Back Cover for the AR88 Speaker Box

I finally located a photo of the back cover, complete with wall mounting brackets. Seems easy enough to replicate, with the exception of the two columns of louvers. The only place I can think of that used to do that sort of work was custom automotive body shops many years ago, but it also looks like the kind of thing any well equipped sheet metal shop should be able to do.

Anybody had this sort of work done?

David
Attached Thumbnails
DSCF0234.JPG  
Reply With Quote
  #10  
Old 11-11-13, 00:02
David Dunlop David Dunlop is offline
Registered User
 
Join Date: Feb 2006
Location: Winnipeg, MB
Posts: 3,397
Default DND 640 Lubricant

I have run across a 17 March 1945 Technical Memorandum from the Director of Signals, Canadian Army advising of proper lubrication of the tuning gear set for the AR88LF. The above noted lubricant is identified in stock as the one to be used for this work.

Does any one have any other references to DND 640, know if this item is still in stock, or what lubricant may have evolved from it in today's world?

David
Reply With Quote
  #11  
Old 11-11-13, 00:47
Mrs Vampire Mrs Vampire is offline
[user name reset]
 
Join Date: Oct 2012
Posts: 392
Default Louvers

http://www.youtube.com/watch?v=ZSnkeVnjE8o

http://www.youtube.com/watch?v=7PsYAJVFBH4

Last edited by Mrs Vampire; 11-11-13 at 00:54.
Reply With Quote
  #12  
Old 20-06-14, 03:04
David Dunlop David Dunlop is offline
Registered User
 
Join Date: Feb 2006
Location: Winnipeg, MB
Posts: 3,397
Default Date format???

A chap in Holland recently sent me some photos of his RCA AR88 speaker. It is a version designed with an open back, no outlet hole on the lower right side for the speaker cable and oddly, no holes on the bottom for mounting the RCA Speaker data plate.

The frame of the speaker element inside, however, has this unusual paint stamp marking. Could this be a date stamp? The middle '44' would certainly be on the money for a valid production year, but how would one read the '3' and the '5'? March 5, or 3 May?

Just wondering if anyone can confirm this would be a date stamp and how it would be read.

David
Attached Thumbnails
image.jpg  
Reply With Quote
  #13  
Old 23-06-15, 02:05
David Dunlop David Dunlop is offline
Registered User
 
Join Date: Feb 2006
Location: Winnipeg, MB
Posts: 3,397
Default Anyone seen these acceptance stamps before?

I finally got around to replacing the finishing hardware on my AR88 Series Loudspeaker today, with a bakelite holder and correct military pocket watch, thanks to the great service from BA Bolts in England getting me the correct hardware.

When I removed the rear cover from the speaker case to work on the hardware, the markings on the rear of the speaker element surprised me. These speakers were built by RCA in their Montreal plant and the bottom of the case has a yellow C-Broad Arrow stamp on it. I assumed the inner speaker element would also be either of Canadian or American manufacture. The idea was sourcing in North America would avoid delivery problems. As you will see in the first photo, there are two stamps on the PM Housing on the back of the speaker element. The upper one is a black ring with R.C.A. at the top and a broad arrow stamp at the bottom. To me, that suggests a speaker element build in England.

The lower stamp, I have seen somewhere before, but cannot recall it's origin. It is a large red Capital P, with a broad arrow fixed to the foot of the P and a single arrow barb fastened to the P in the top left part of the letter.

Can anyone ID this stamp?

The second photo is of the completed speaker together with the AR88LF Receiver.

David
Attached Thumbnails
AR88 Speaker Inside View.JPG   RCA AR88LF with completed Speaker.JPG  
Reply With Quote
  #14  
Old 23-06-15, 11:54
Mike Kelly's Avatar
Mike Kelly Mike Kelly is offline
Fan of Lord Nuffield
 
Join Date: Feb 2003
Location: Victoria Australia
Posts: 5,631
Default Ar88

Hi

Cannot help you with your speaker marking .

I' ve seen a few AR88's here in Aust., never owned one myself but a neat set they are . I had no idea they were made in Canada . I think there was a LF version made somewhere else .

Mike
__________________
1940 cab 11 C8
1940 Morris-Commercial PU
1941 Morris-Commercial CS8
1940 Chev. 15cwt GS Van ( Aust.)
1942-45 Jeep salad
Reply With Quote
  #15  
Old 23-06-15, 13:39
Bruce MacMillan Bruce MacMillan is offline
a Canuck/Brit in Blighty
 
Join Date: Jul 2004
Location: Hell Fire Corner, Kent UK
Posts: 704
Default

I have the same mark on a wooden crate that came with two 34' masts. The lid was marked "Philco Corp. of Canada". It could be an acceptance mark or just identifying the source. It's possible RCA aquired the speakers from Philco. The actual masts inside the crate were made by Campbell Manufacturing so subcontracting was well practiced.
Reply With Quote
  #16  
Old 26-06-15, 02:42
David Dunlop David Dunlop is offline
Registered User
 
Join Date: Feb 2006
Location: Winnipeg, MB
Posts: 3,397
Default

Bruce.

Thanks for reminding me about Philco. Easy to forget sometimes how, as you say, they were often interconnected for production of a particular item, and also that production of many items was either done at more than one company at the same time, or alternatively shifted completly from one company to another over time.

Cheers, David
Reply With Quote
  #17  
Old 03-07-15, 13:32
sapper740's Avatar
sapper740 sapper740 is offline
Derek Heuring
 
Join Date: Oct 2004
Location: Corinth, Texas
Posts: 2,018
Default 1943 RCAF handbook

My 1943 RCAF "WIRELESS MECHANICS/WIRELESS OPERATORS" Students' Handbook contains a brief reference to the GR17 (AR88) - (10D/5479) General Purpose Ground Station Receiver (RCA). There are no schematics but it lists the number and quantity of valves as well as all the chokes and filters and their location in a plan view of the set. There are some maintenance tips but no mention of any lubricant used. If you wish I can scan and email you what info is included on your set.

CHIMO!
Derek H.
__________________
Quis custodiet ipsos custodes?
Reply With Quote
  #18  
Old 09-07-15, 04:25
David Dunlop David Dunlop is offline
Registered User
 
Join Date: Feb 2006
Location: Winnipeg, MB
Posts: 3,397
Default

PM sent, Derek.

Thanks,


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
RCAF CMPs John McGillivray The Softskin Forum 1 26-12-12 19:06
Sold: communications equipment for sale Jim Hodgson For Sale Or Wanted 5 26-03-12 21:29
communications carrier Ralph Volkert The Carrier Forum 0 04-07-08 23:00
Wireless Equipment cletrac (RIP) WW2 Military History & Equipment 35 24-02-07 12:05
RCAF Clothing Geoff Winnington-Ball (RIP) WW2 Military History & Equipment 4 28-06-03 16:36


All times are GMT +2. The time now is 19:24.


Powered by vBulletin® Version 3.8.4
Copyright ©2000 - 2024, Jelsoft Enterprises Ltd.
Copyright © Maple Leaf Up, 2003-2016