AR-2 and AR-6 Receivers


Type: Receiver with DF capability
Modes: AM/CW/MCW
Frequency Range: 140 - 400 KHz and 480 KHz to 21 MHz
Circa: 1941-1944
RCAF  REF. No. 10D/1275
Comment :

1) AR-2 was the 14 VDC version while the AR-6 Receiver was the 24 VDC version. . Many units in the AR/AT series were stenciled with the operating voltage on the front panel.  These were labeled this was so as to prevent the installation of the 14 volt version in an aircraft with a 28 volt electrical system. Making this mistake would result in blown tube filaments as well as damage/destruction of the dynamotor, band change motor, function change motor, pilot lamps, microphone, BFO relay, muting relay etc.

2) The AR-2 was paired with the AT-1 transmitter when used with a 12 VDC power source.

3) One application for these radios found its way into the Blackburn Shark aircraft.
In another application,  the AR-2 /radio was fitted into boats of the RCAF marine squadrons.

AR-2 receiver.  To see a variant, click on image.  (Photo by Jerry Proc)

Rear view . (E-bay photo) 
 General view of the chassis. Some of the components are missing. (E-bay photo) 
Bottom view of chassis. (E-bay photo) 

ar2_remote control.jpg
This AR-2 remote control 10D/1277 was built by Northern Electric rather than Canadian Marconi. Perhaps it was a second sourcing.  (Photo by Jerry Proc) 


AR-2 Full schematic
AR-2 Simplified schematic.
AR-2 Notes from Tom Brent
AR- 2 notes from Dave Lawrence VA3ORP


Some of the AR-2/AR-6 receiver technical manuals have the chassis connector incorrectly listed as  Cannon MK-27-32SL

Cannon never made K series connectors in an "M" size. The correct part number for the chassis connector should be  NK27-32SL

Finding the part number for a mating cable plug is now easier. It is Canon NK27-21 (straight) or NK27-23 (90 degree)  (Courtesy Tom Brent) 

Contributors and Credits:

1) Observations on the RCAF AT1/AR2 - General Purpose Radio by Dave Lawrence, VA3ORP
2) Tom Brent <navyradiocom(at)>

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Aug 29/22