Rogers Majestic Parts Numbers and VAOS Numbers
Here is where a find like Chis B. made with his NOS 19-Set HP kit so many years ago in invaluable in trying to make sense of what took place in 1944 wartime production. This equipment and related documentation is still original and untouched, never having stripped, rebuilt or repainted. A gem of a snapshot in time.
The first two photographs are of the data plates on the Amplifier and Vibratory Power Unit. First big discovery is that the RM-SA Numbers on the data plates are actually the Rogers Majestic Part Numbers for this equipment. Who knew!
The Amplifier built by Rogers Majestic is RM-SA 4241
The Vibtrator Power Supply, subcontracted to Electronic Laboratories of Canada Ltd is RM-SA 4214
The No. 5C Mk I Cdn Switchboard is RM-SA 3897
Chris B also provided a photo of the Parts List for the Amplifier. Note even more 'RM' formatted numbers.
Interesting how when we started trying to sort this information out with just one number to work with from the No. 5C Mk I Cdn Switchboard the known logical path led to closely related Air Ministry equipment.
Another interesting tidbit from these data plates. Take a close look at the VAOS Numbers on them. They look remarkably similiar to the block of numbers Canadian Marconi was using in 1944 on an interim basis: C000XX for the 52-Set. Possibly more proof of the overlaid on new equipment entering service in 1944.
David
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