ARC R-22

[n5ama]

I recently acquired a R-22 (AM broadcast band radio), the control box and a splined cable. I got a 12 pin connector for the R-22 and a 6 pin connector for the control box. I was able to locate a poor quality schematic for the receiver and don't see the connection information between the two pieces of equipment. They are apparently not directly connected but maybe through a wiring harness somewhere else on the aircraft.

This loctal tube receiver was apparently used on the early post WW2 jets. I don't have any info other than that. The R-22 looks somewhat like the WW2 ARC 5 receivers but has a 12v dynamotor versus 28v. Is there more info out there somewhere?

Thanks in advance for any additional information and happy new year!!
Tom N5AMA

[KA3EKH]

ARC Built a ton of stuff that was used for Military and Civil aircraft. Do not know the R-22 but have seen the 190 to 550 KHz versions a lot. That more then likely was used with a ADF system. Would suspect civil aviation being twelve volts. Here is a link to the 1960 ARC Catalog:

http://www.bunkerofdoom.com/lit/ARC_1960_cat.pdf

[n5ama]

Hi Ray,
Thanks for the reply. I will try to run down a manual/tech sheet or at least a better copy of the schematic. My copy is so blurry it’s hard to read numbers and component values.

I couldn’t make the connection to the 60s catalog using the link you provided but if there are some other receiver model numbers out there (either military or civilian), it might give me a better idea of what I got and how to hook it up.

I really appreciate the help.
Tom N5AMA

[WB6NVH]

That receiver is part of the ARC Type 12 line (not ARC-12) and was an RDF receiver mainly for light aircraft that would use broadcast stations in addition to NDB's and Adcock low frequency ranges.  They are supposed to be a really good broadcast receiver.  They seem rare and getting the control head is a real bit of luck as those are harder to find, and with no dial on the receiver, very helpful.  As I recall, the composite Type 12 manual has the wiring harness diagram for radio to head and so forth.  The catalog mentioned above is newer than the receiver here and by then they were only selling a couple pieces of Type 12 gear.

[n5ama]

Hi Geoff,
Thanks a ton for this info. Using your reference to the “Type 12” nomenclature opened a lot of information about this type of gear. My receiver isn’t listed but there is a lot of great information here that isn’t on the usual ARC-5 equipment.

My receiver has only one multi pin connector on the front but by the process of elimination, I should be able to connect the receiver to both the control head and DC power.

I would also like to find the loop antenna but put that in the “not a snowball chance in hell” category. The extra info in the article at least puts a model number on this piece of equipment.

Thanks again!!
Tom N5AMA