[ARC5] eB Item 181264751336 ATA transmitter

[WA5CAB at cs.com]

Les,

Not exactly.  The Navy briefly use a modification or subset of their two 
and three letter electronic equipment nomenclature system in use since WW-I 
which started off with three letters instead of two.  AFAIK, it was only ever 
applied to aircraft sets and only remained in use for two or three years 
before the Navy nomenclature system was mostly superceded by the JAN system.

The first letter identified the environment in which the equipment was 
used.  A = Aircraft.

The second letter identified what the equipment did.  R = Receiver and T = 
Transmitter.

The third letter was the sequence number, A = first set, B = second set, 
etc. 

FWIW, under the original system, set nomenclature of ground and shipboard 
transmitters began with "T" and aircraft transmitters began with "G".

In the first two designated sets, ATA went with ARA and ATB went with ARB.  
But ATC has nothing in common with ARC and ATD has nothing in common with 
ARD.  ATE/ARE through ATK/ARK were similar glide bomb transmitters and 
receivers, with each letter pair having a different operating frequency band, and 
virtually never turn up.  It doesn't appear that many were built and those 
that were must have been pretty quickly superceded by AN/APW-nn sets.

ATA/ARA was redesigned and redesignated AN/ARC-5.  ATC was redesignated 
(with no or only minor changes) AN/ART-13.  ARC was replaced by ARC-1 which at 
the second redesign became AN/APR-1.  ATB/ARB, ARD and ATD were dead ends, 
with all but ARD serving under their original nomenclature through the end of 
the War.  ARD and ARD-1 were replaced by AN/APR-1.

Robert D.

In a message dated 11/24/2013 19:08:42 PM Central Standard Time, 
vk2bcu at operamail.com writes: 
> Hello Carl,
>   You may well be correct.
>   I rely on other sources - and here my source is Wikipedia.   See
>   http://en.wikipedia.org/wiki/AN/ARC-5
>   The items in the "command" series of equipment are shown in a table.
>    Three columns in the table list the particular "class" of transmitter
>    or receiver.
> 
>   These are given as ARA-ATA, SCR-274-N and AN/ARC-5.
>    This is what I understand.  The designations ARA and ATA are acronyms
>    for "aircraft receiving apparatus" or "aircraft reception apparatus"
>    (as I understand, but I could be wrong).
>    This designation refers to an early system of nomenclature used (as I
>    understand) by the US navy to identify a particular type of
>    equipment.
> 
>    ATA is rather the same - transmitting apparatus.  In other words this
>    represents a particular class of apparatus.  The transmitter itself
>    is "CCT-52232" and from this I understand a transmitter made by
>    Stromberg Carlson, operating between 2.1 and 3.0 MHz. 
> 
>    Finally, I understand AN/ARC-5 is a later development of the
>    "command" equipment used jointly by both the US (army) Air-Force and
>    the Navy.
>    
>   But all this is only "my suppose".  There are people on this list who
>   know about the naming conventions.
>   You may well be correct.  I know nothing about Collins equipment.
> 
> 
>   73 de Les Smith
>   vk2bcu at operamail.com
>