[Milsurplus] Interesting (IMO) Setchell-Carlson Beacon Band Sets

[David Stinson]

These light aircraft sets are a special interest of mine,
especially those with Ferrying Command lineage.
Thanks for this post, Mike.

-----Original Message-----
>From: Mike Morrow <kk5f at earthlink.net>
>Sent: Oct 28, 2010 8:08 PM
>To: milsurplus at mailman.qth.net
>Subject: [Milsurplus] Interesting (IMO) Setchell-Carlson Beacon Band Sets
>
>The AN/ARR-13
>
>http://cgi.ebay.com/NOS-WWII-Military-Radio-R76-ARR-13-Receiver-/370450559026
>
>This is the seldom seen R-76/ARR-13, a.k.a. the Setchell-Carlson Model 512.
>
>This is definitely NOT a common BC-1206-C (S-C Model 524) type of radio.
>
>1.  It has a pull switch for the common 278 KC tower frequency.
>2.  It does NOT operate from a 28 vdc supply.  The filaments are wired for
>    12 vdc, and a separate B+ HV supply is required.
>
>This was intended to mate up with the common RCA AVR-20A/AVT-112 HF set that
>was on L-5 observation aircraft.  It provided beacon band coverage, and got
>its HV from the AVA-126 vibrator supply that served the AVR-20A and AVT-112.
>This set was a much better choice (smaller, lighter, with RF stage) than the
>AVR-15 (same size and weight as the AVR-20A) that RCA offered for beacon band
>coverage. 
>
>The AN/CRR-1
>
>(No auction URL to show.)
>
>Writing about S-C beacon band sets with military pedigrees, I'll cite another
>interesting but rarely seen unit...the AN/CRR-1, a.k.a. S-C Model 591.  It is
>a dry battery (AB-194) powered receiver that was intended to be paired with the
>SCR-578 (BC-778) "Gibson Girl" 500 KC transmitter to provide two-way comms
>between the distressed party and the rescue aircraft.  The AN/CRR-1 covered
>195 to 405 KC, so there was a frequency split.
>
>Military documents say that 420 were ordered in 1944 for use on Arctic ferry
>routes.  The SCR-578 and AN/CRR-1 combo is an interesting concept, IMO.  I
>wonder if any actually got used that way.
>
>I have all these sets in my accumulation, but I can't remember where I got
>the AN/ARR-13 or the AN/CRR-1.
>
>Mike / KK5F
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