1944 C-15A-Wire-5 Restoration

[Robert Bergeron]

Our common friend and contributor par excellence David Dunlop had asked the question back in 2017 : How do you know where to drill the holes in the table top to install the different radio carriers ? A : A Masonite board came screwed to the top with all the possible holes pre-drilled to accomodate the different carriers . No written instructions in the installation manual . The Masonite acts as a mask or template . Much better than words ! I recently acquired this original table from another unit that was located in New Brunswick but that came from Ontario originally . The Masonite is in good enough condition to reuse it . Underneath is a perfectly sound 3/4 inch plywood . Voilà ! Mystery solved.

[Robert Bergeron]

No joke , this is a long standing mystery that is now solved .

[Robert Bergeron]

These are the rubber supports made by our friend and contributor Jordan Baker . I have made steel strips to prevent them from spreading under the weight of the 95 + Lbs of the No 23 carrier and the WS No 19 . I will use 2*inch bolts . When i get the mountings , carrier No 1 i will update the installation . I can’t wait for the postman to come by with them !

[Bruce Parker (RIP)]

Originally Posted by Robert Bergeron

These are the rubber supports made by our friend and contributor Jordan Baker . I have made steel strips to prevent them from spreading under the weight of the 95 + Lbs of the No 23 carrier and the WS No 19 . I will use 2*inch bolts . When i get the mountings , carrier No 1 i will update the installation . I can’t wait for the postman to come by with them !

And they will arrive with four original metal strips, two for the table top and two for the bottom.

[David Dunlop]

Posts 592/593 is a VERY hard to find RCA AR88 Loudspeaker. It is only rated at 2.5 Ohms. This was a late production run for Canadian and British Contracts as it had the Pocket Watch Holder predrilled and capped off so one could be added if needed. Earlier versions lacked that feature. The AR88 Series of receivers were a very highly regarded Intelligence Gathering piece of kit still in use in remote northern areas of Canada well into the Cold War Era.

You would be better off sticking with the Gunnery Speaker designed for the 19-Set/Tannoy System.

David

[Chris Suslowicz]

Originally Posted by David Dunlop

Posts 592/593 is a VERY hard to find RCA AR88 Loudspeaker. It is only rated at 2.5 Ohms. This was a late production run for Canadian and British Contracts as it had the Pocket Watch Holder predrilled and capped off so one could be added if needed. Earlier versions lacked that feature. The AR88 Series of receivers were a very highly regarded Intelligence Gathering piece of kit still in use in remote northern areas of Canada well into the Cold War Era.

You would be better off sticking with the Gunnery Speaker designed for the 19-Set/Tannoy System.

David

Control Unit 190 (as used in the Sexton 25pdr SP Gun installation) is intended to drive a Tannoy speaker (with transformer) direct, so that's probably the way to go - the circuit diagram should exist in one of the EMERs. (FZ256/3 has the exploded view but not the circuit diagram of the 190 box - it's possible they used the IC amplifier as a driver for the speaker rather than use the 6B8 'A' set output stage.)

Best regards,
Chris.

Chris.

[rob love]

Do you have those artillery speakers Robert? If not, they are somewhat common out this way....I think I saw a few sets at my favorite surplus store.



Personally, I am looking for the control unit.

[Chris Suslowicz]

Originally Posted by Robert Bergeron

Our common friend and contributor par excellence David Dunlop had asked the question back in 2017 : How do you know where to drill the holes in the table top to install the different radio carriers ? A : A Masonite board came screwed to the top with all the possible holes pre-drilled to accomodate the different carriers . No written instructions in the installation manual . The Masonite acts as a mask or template . Much better than words ! I recently acquired this original table from another unit that was located in New Brunswick but that came from Ontario .The Masonite is in good enough condition to reuse it . Underneath is a perfectly usable 3/4 inch plywood . Voilà ! Mystery solved.

That masonite sheet needs to be preserved (and documented) for posterity!

I wonder if anyone has a plan or map scanner big enough to produce a 1:1 copy on paper? (Then you just need to work out which holes correspond to which set carrier!)

Chris.

[Robert Bergeron]

Thank you again David . Your contributions are very appreciated . A spook Leitrim / Alert / Masset speaker , interesting . Chris , i thought of removing that Masonite sheet to copy it just this afternoon . We had that thought almost at the same time . It would indeed be important information to save .Rob , i don’t have them and i would appreciate any help getting those artillery speakers . I am more and more inclined to make the truck out as an artillery command post anyway . Bruce i can’t wait to put my hands on those carriers . This is starting to look like a group effort men .

[Robert Bergeron]

Hole patterns for undetermined carriers . Underneath this Masonite sheet i found a single piece of jointed plank . I had to look twice because i did not believe my eyes . It was 1 inch thick . I saw pencil marks where it was cut to size . A single piece of plank ! It was in perfect condition so i did not have to replace it with plywood .

[Robert Bergeron]

Hole patterns for the two sets of rubber feet on the left of the No 23 carrier . Notice the numerous other hole patterns .

[Robert Bergeron]

Found the measurements to install the mountings carrier No 1. So ,from the back of the table near the wall , the first hole is 1 5/8 inch . The second hole is 3 3/4 inch from that one , The third one 3 3/8 from it and the forth 3 3/4 inch from that one . Repeat 34 3/4 inch to the other side . The instructions talk of 5/16 holes to accommodate 1/4 inch bolts .

[Robert Bergeron]

Here is the reference to the holes in the table of the wireless truck .