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

[Kenneth G. Gordon]

Concerning the BC=1206 and variants, there was a long, 2 part article in the most recent two 
issues of Electic Radio Magazine on this very subject.

I suggest that those interested in this receiver take a close read of that article.

Ken W7EKB

On 25 Feb 2023 at 18:59, Mike Morrow wrote:

> >  The manual shows a Detrola LF receiver mounted
> > on the lower right side of the cockpit.
> 
> That's the Detrola 438.  There are at least six different BC-1206 models...A, B, C, CM, CM2, D.  The  BC-1206-A model is the same as the Detrola 438.
> 
> > 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.
> 
> The R-76/ARR-13 has other very significant differences.  It is wired
> for 12 vdc filaments and requires an HV B+ supply of about 150 vdc. 
> It was made for use in light observation aircraft like the Stinson
> series that had a 12 vdc electrical system.  It was most commonly
> paired with the RCA/Continental AVR-20A1 HF receiver, AVT-112 HF
> transmitter, and AVA-126 vibrator power supply.  The instruction
> manual for the R-76/ARR-13 instructs how to wire it to the AVA-126. 
> It is no surprise that the R-76 beat out the RCA AVR-15 beacon band
> receiver. 
> 
> The national standard LF tower frequency (often paired with 3105 kHz)
> that the pull swich on the R-76 normally selected is 278 kHz.  It
> tunes all three front-end circuits to allow instant swap between 278
> kHz and the frequency set on the dial. 
> 
> There is a very interesting JAN nomenclatured beacon band receiver,
> the AN/CRR-1 (Setchell-Carleson Model 519).  It is powered solely by
> dry cells and uses 1.5 v filiment tubes.  It was to be packed with the
> SCR-578-* Gibson Girl 500 kHz emergency transmitter for North Atlantic
> flights from North America to Europe.  The AN/CRR-1 potentially
> allowed two-way comms from rescue aircraft (on a different frequency)
> to a downed crew.  The only set I've seen is the one I have, but it is
> described in USAAF documents of the late WWII era. 
> 
> > 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.
> 
> That does not apply to the R-76/ARR-13, which requires a 12 and 150 vdc power supply.
> 
> Mike / KK5F