[ARC5] Command set nomenclature ATA, ARA, AN/ARC-5 and so on ...

Mon Nov 25 00:34:10 EST 2013

  Hi Robert,
  Thank you.  It's always good to get a helpful correction.
  However, looking at what you wrote below, and at the Wikipedia page
  there is still some uncertainty in my mind.

  It seems that ATA/ARA  (as I see on the Wikipedia column heading)
  applies to a complete CLASS of transmitters (first) and receivers
  (ARA).
  To repeat this idea, using transmitters as an example: according to
  the Wikipedia page that individual items in the "ATA"  list include
  the following transmitters:  CBY-52232,  CBY-52208 ... and so on.
  So CBY-52232 is an example of one item that has the nomenclature ATA -
  is that correct?

  Now to give the conflicting idea (which I NOW believe is wrong)
  If I didn't have the Wikipedia page in front of me I'd conclude that
  there was but a SINGLE item identified by ATA (not a set of
  transmitters as I suggest above).
  When some clever designer finished the SECOND transmitter was ATB.  So
  one letter per item.  
  It seems this understanding  is wrong (i.e. one letter of the alphabet
  does not go with a SINGLE type of receiver)

What I DO understand NOW is that ATA does NOT mean "aircraft
transmitting apparatus".  It means a specific CLASS (the first class) of
transmitters.

  How am I doing?

  73 de Les Smith
  vk2bcu at operamail.com

On Mon, Nov 25, 2013, at 15:07, WA5CAB at cs.com wrote:
> 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 before the Navy nomenclature system was mostly superceded by the JAN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
> > 
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