[Milsurplus] R-3A/ARR-2X

[BSugarberg]

 From Electric Radio Magazine #15, July 1990

Electric Radio In Uniform by Walt Hutchens KJ4KV

The ARR-1 and ARR-2
----------------------
"The AN/ARR-1 and ARR-2 are two generations of receivers for an aircraft
navigation and communications system.  There are also two generations of
transmitters, the YE and YG."

"The main purpose of the system was to allow aircraft equipped with either
receiver to find a transmitting station, usually on a ship, having a YE or
YG transmitter without direction finding; such a system is called a homing
beacon."

"The transmitter operated on a frequency between 234 and 258 mcs.  It
transmitted either CW (usually) or voice signals from a highly directive
antenna rotating at 2 rpm....When transmitting navigational signals, the
transmitter was keyed with a different letter of the alphabet for each 30
degree sector....Every tenth revolution, the transmitter sent a two letter
station identifier in all sectors...."

"The ARR-1 (early Navy id ZB) is a 4 tube TRF receiver covering 234 to 250
mcs....Its output (540-830 kc) goes to another receiver of any type which
can be tuned to that frequency (from which it also draws power)."

"The ARR-2 is a self-contained 11 tube receiver.  (No companion receiver
needed)."

73, Bruce WA8TNC
================
laptops wrote:

> I have just aquired 2 of thease my Question is WHAT ARE THEY I have 
> never seen thease before and have asked a couple  people and no one 
> seems to know what they are.I know they are receivers but after that I 
> have no clue.For those who know please tell me
> Carl