[ARC5] BC-453 in the SCR-274N Configuration

[Mark K3MSB]

The P-51 Pilot Training Manual dated 15 Aug 1945 mentions only the SCR-522
(which makes sense as by that date it would have replaced the SCR-274N).
The manual shows a Detrola LF receiver mounted on the lower right side of
the cockpit.     “The Detrola is a low-frequency receiver.  It operates
between 200 and 400 Kc, which covers the transmission band for towers and
range stations through the United States.”

I have no doubt that a BC-1206 could be used in place of the Detrola as
visually they look to be about the same size.

The BC-1206 was Setchell Carlson Model 524.   The Model 512 was the
R-76/ARR-13.   It was similar to the 1206 but had a switch that when pulled
out set the radio to 276 Kc.  See attachment.

Another important use of the BC-1206 and R-76 was they were used for ferry
flights from the factory to the facility that installed the radios.  It was
a temporary installation.

73 Mark K3MSB

On Fri, Feb 24, 2023 at 11:07 AM <releazer at earthlink.net> wrote:

> Before WWII and even up until the 1970's to a limited degree, AN ranges
> were used on low frequencies.  These featured signals that gave a
> continuous tone if you were headed toward the station and an A (Dit Dah)
> tone or an N (Dah Dit) tone if you were off to one side.  Light aircraft
> without even an electrical system could use the AN ranges for navigation,
> and also receive control tower instructions by employing battery powered
> receivers.  Fighter aircraft generally did not have an ADF or even a loop
> antenna and so were equipped with LF receivers for the same reasons.  When
> SCR-522 replaced the SCR-274-N  or SCR-283 equipment small LF receivers
> were often installed in the cockpit to preserve the LF capability, such as
> the BC-1206 series made by Detrola, Setchell Carlson and others.  It is not
> clear to me how often the BC-1206 equipment was retained for overseas use
> or how USAAF fighters in the UK homed in on their airfield beacons.
>
> Postwar the BC-1206 was replaced with BC-453 in many refurbished P-51's
> that had ARC-3 fitted and can be seen perched high above the ARC-3
> equipment under the bubble canopy.
>
> Wayne
> WB5WSV
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