[Milsurplus] WWII Navy radar question

William Donzelli wdonzelli at gmail.com
Sun Nov 26 16:02:09 EST 2006


>  According to SHIPS 242A, the first contract for the SR was in 1944/45.  It
> shows SR through SR-4 but no SRa.  It also shows SA through SD all as 1942.
> So I'm inclined to guess that the "SR" in the early records is gener

Too early for SR. I bet they meant SK. The first installs of SKs could
have happened in late 1942.

> However, the use of the lower case "a" is puzzling in that context.  The
> lower case "a" suffix to equipment set nomenclature usually indicated a
> change from the standard model as opposed to a modification/improvement for
> which the suffix number was incremented (but that was not the only or even
> most common reason that the number was incremented).  The most common reason
> for the "a" was use of a different power source, like 25 cps instead of 60.
> Or I think one or two cases where the frequency range was different from the
> standard model.

SRa is an SR with a new modulator. BB-59 has an SRa.

--
Will
>  Anyway, I can't see how the SR of 1942 could be the same equipment as the
> SR of 1944 and 45.
>
>  "CX" is shown in 242A to be "Commercial Experimental" and covers everything
> from radar to sonar to motorcycle radios.  In some cases the notes say what
> the nomenclature of the production model was, but not in the case of the
> CXAM (1940) or CXAM-1 (1941).  The Notes column just says Obsolete.  And
> browsing the Notes, I don't see any predecessor for the SR.
>
>  In a message dated 11/26/2006 10:28:01 AM Central Standard Time,
> SHAEF1944Returns at aol.com writes:
>
> Hi guys ...  working on the Amer.Veterans Museum site, page about battleship
> fire control, and have run across a stumper ... for me, anyway ... I have a
> list of search radars installed on the pre-war Standard Battleships, and it
> shows a couple got the CXAM radar in 1941,  but most of them an SRa radar in
> 1942.  I have been able to find some info on all the radars, CXAM, SC, SK,
> etc,  but nothing at all on the ' SRa '.   I did find a few pics of the
> reciever/transmitter stuff on a destroyer  or DE website ( I think DE220 )
> that says it is SRa equipment, but no real info, or anything about the
> antennas, etc.  Any of ya'll ever heard of this,  or have any info ?  On the
> list that shows it, could the ' SR ' just be generically used for ' search
> radar ' ?   The navy history site doesnt list any " SRa " among the radar
> used by ships, but who knows,  so I am asking the experts for some help.
> Thanks guys, Richard
>
>  Robert Downs - Houston
>  <http://www.wa5cab.com> (Web Store)
>  MVPA 9480
>  <wa5cab at cs.com> (Primary email)
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>
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