Canadian CH-113 Labrador helicopter HF set question

[yahya]

I'd like to ask for help in identification of the HF set from the mid-1960s used on the Canadian CH-113 Labrador helicopter (a version of the CH-46 Sea Knight). The control unit of the HF set is visible on the photo below under #8. Is this a Canadian ARC-508? Or a variation of the Collins' HF rig?

 

[merlin]

Not quite identical, but the Collins like this was/is used in the HH-60G. Talking the entire panel. #5 would be the transponder.

 

[WA8ZTZ]

Not quite identical, but the Collins like this was/is used in the HH-60G. Talking the entire panel. #5 would be the transponder.

Just curious, which Collins set do you reference?

btw... #5 looks like the UHF comm control head to me... notice the volume control, the T/R+G (guard), and the ADF modes (airborne UHF direction finder).

 

[yahya]

Meanwhile I established that the HF radio #8 was made by the Canadian Marconi (CMC). Its type and specs still remain unknown.

The rest of the sets shown on the sketch above are the two ICS (either AIC-10 or AIC-18), Bendix VHF CNA-21C(N) control unit, Collins ARC-52 derivative (ARC-552 or ARC-522) UHF, ARN-501 (i.e. ARN-21) TACAN, and ARC-59 ADF. But the HF set remains a sole mystery.

The CH-113 notably used the SARAH homer to find a downed airman.

 

[merlin]

I don't know the specs for the Collins but consider for every type of aircraft application there can be a few different pannels.
Like the Labrador, there are mix and match sets for their use and laid out very similar so a pilot doesn't have to wonder what a given panel does. IE: the Bendix VHF nav/com is the same in the same location. The SARAH in the HH60, the same but perhaps newer.
Both aircraft were tailored for SAR and rescue.

 

[yahya]

The CH-113 used the Collins 618T HF radio with the Collins 437R "vertical tube" antenna aft the cockpit but only later. The initial HF set that was used on the CH-113 was the above mentioned CMC radio of unknown type with an LW antenna.