[ARC5] INFO Wanted: R22 receiver BCB NAV

[D C _Mac_ Macdonald]

I suspect it is probably quite similar to the R-24/ARC-5.

73 - Mac, K2GKK/5
Since 30 Nov 1953
Oklahoma City, OK
USAF (Retired) 61-81
FAA (Retired) 94-10

________________________________
From: arc5-bounces at mailman.qth.net <arc5-bounces at mailman.qth.net> on behalf of Kenneth G. Gordon <kgordon2006 at frontier.com>
Sent: Sunday, September 27, 2020 23:08
To: ARC5 at mailman.qth.net <ARC5 at mailman.qth.net>; Bill Cotter <n4lg at qx.net>
Subject: Re: [ARC5] INFO Wanted: R22 receiver BCB NAV

On 27 Sep 2020 at 23:44, Bill Cotter wrote:

> Hello Everyone,
>
> I am trying to locate information on an unusual ARC5 BCB
> (.55-1.5mHz) Navigation Receiver. According to a info source this
> model superceded the R10/ARC-5. It is unique to the traditional
> ARC-5 series that is part of the SCR-274 in the following manner:
>
>       Front Panel: Power connector, LOOP BNC, ANT BNC, TEL Jack
>       Rear Panel: No power connector
>       Tube Lineup loctals: 14A7, 14S7, 14A7, 14F7, 14R7, octal: 12A6
>       Below chassis: Plastic wiring, 5% resistors, 239kHz IF
>
> Picture attached
>
> If you happen to have any info (TM, manual, schematic, alignment,
> etc), I would appreciate a copy by PDF or print.
>
> THANKS - Bill N4LG

Bill:

That is part of the later ARC Type 12 series equipment, and was NEVER part of the
SCR-274N series nor of the Navy AN/ARC-5 series.

I believe I have at least a schematic of that receiver and I think I also own one of those
receivers.

The power for that receiver was attached to the front. Is your front-panel still complete? Do
you have a photo of the front? Ordinarily, there should be a big "snout" in the center of the
front panel for power connections.

Also, those receivers never had a BFO either, but instead had a noise-limiter, nor did they
have a dial.

Hang on for a day or two and I will eventually find the schematic.

Ken W7EKB



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