TMR-1-V Receiver


Type: Receiver #48745
Frequency Range: 565 to 1750 KHz per nameplate. Actually higher as note on the front panel tuning chart.
Circa: ?

TMR-1-V Receiver  (Photo by Bruce MacMillan)
TMR-1-V Interior view. (Photo by Tom Brent) 

Nameplate. (Photo by Bruce MacMillan)
"Houston - we have a problem "- The frequencies on the tuning chart do not match the frequency range stamped unto the nameplate. Does anyone know why? If so,  .This example is held by the SPARC Museum in Vancouver BC . Those dots in the Dial setting column are red, blank, yellow , green and blue. SW denotes the position of the bandswitch. The Dial setting colour corresponds with similarly coloured dots on the logging scale.  (Photos by Tom Brent)
This receiver has a two position bandswitch. The coloured dots observed in these photos were not Canadian Marconi factory standard. It appears they were added by a former operator of the receiver.
Stations of repeated interest were marked with coloured dots on the logging scale. In this example, there is a blue dot atop the numeral one. and a green dot to its left. These correspond to 5420 and 5555 KHz. as shown on the tuning chart.
The frequency chart indicates that this receiver was used to receive transmissions from station CZO. Around 1951, some 2,800 vessels operating in B.C. coastal waters, had radiophones which communicated with station CZO  It was operated by  the Northwest Telephone Company which was headquartered in Vancouver. At the time, it was the greatest coastal radiotelephone system in Canada, serving approximately 1,800 vessels.
A tug boat skipper anywhere within  the range range of the Vancouver station , could call a Vancouver telephone number by accessing an available transmit channel and then setting up a call with the marine operator.

The chart on the front of the radio lists a frequency of 2558 KHz for CZO and that was still in use by this radiotelephone service in the early 1970's

The North-west Telephone Company we are talking about here was started as a division of BC Telephone in 1929 in order to experiment with radiotelephone as a way of providing a near equivalent of landline telephone service to remote areas of British Columbia that were not served by wire. Note there are numerous examples of "Northwest" being used in naming  telephone companies, both in Canada and the United States.

Interestingly, the Department of Transport also provided a "High Seas" marine telephone service through VAI (Vancouver). As well, VAI took over the ship-to-shore long range radiotelegraph service that had been provided by the Canadian Armed Forces via CKN in Aldergrove/Matsqui. Finally, there was also a D.O.T. Coastal Marine Telephone service from the Vancouver, Alert Bay, Tofino and Victoria stations for ships sailing within coastal waters

Contributors and Credits:

1) Bruce MacMillan <bruce_macmillan(at)>
2) Tom Brent <navyradiocom(at)>
3) CZO - Google Books

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Jan 16/18