[Boatanchors] Receiver Antenna Input Question
Kenneth D. Grimm, K4XL
grimm at sbc.edu
Mon Mar 2 15:55:57 EST 2009
I guess I still don't understand the following:
WA5CAB at cs.com wrote:
> >> >It was never anyone's designation.
Carl wrote:
> No one is saying that "ARC" wasnt an early Navy designator. However
> except for the purist it confused no one after the war.
>
> The rest of your post drifts too far off the original ARC-5 subject.
>
> Carl
> KM1H
>
>
>
> ----- Original Message -----
> From: <WA5CAB at cs.com>
> To: <grimm at sbc.edu>
> Cc: <boatanchors at mailman.qth.net>
> Sent: Monday, March 02, 2009 2:16 AM
> Subject: Re: [Boatanchors] Receiver Antenna Input Question
>
>
>
>> No. Technically it was a US military system. Practically, most
>> contracts
>> for components were from the Navy. But in any case, AN/ARC-5 first
>> appeared
>> about four years before USAF even existed.
>>
>> AN/ARC-5 (the nomenclature) is from the Joint Army-Navy Nomenclature
>> System
>> (AKA the AN system or JAN system) for Communication and Associated
>> Equipment.
>> The earliest document I have listing the specifications of the system
>> is
>> dated June, 1943 (six months older than I am) but I've seen
>> indications it was
>> coming into use semi-officially as early as October or November 1942.
>> There are
>> a few low-number sets whose official nomenclature is preceded by an
>> asterisk
>> and one of the associated manuals explained that the asterisk means
>> that the
>> nomenclature was assigned before the system was officially approved.
>> I can't
>> turn up the reference quickly tonight but the official nomenclatures
>> of AN/ARN-1
>> which was changed to AN/APN-1 are *AN/ARN-1 and *AN/APN-1.
>>
>> USAF didn't exist until 1948.
>>
>> I don't have documents to prove it but I'm sure that the reason that a
>> lot of
>> Navy nomenclatured equipment was re-nomenclatured under the JAN system
>> (with
>> no changes other than the nameplates) was that there were a lot of
>> conflicts
>> or potential future conflicts between the two systems. ARC versus
>> AN/ARC is an
>> excellent bad example. For the most part, this was not true of the
>> Signal
>> Corps nomenclature system and many items first procurred under that
>> nomenclature
>> system in the 30's or 40's continued to be procurred without change in
>> nomenclature into the early 80's at least. I've had GC-7's made in
>> the 70's and
>> BA-38's and BA-48's made in the 80's. Which isn't to say that no
>> Signal Corps
>> equipment was re-nomenclatured. Quite a bit was. But it didn't have
>> to be, it
>> just was.
>>
>> In the Navy system, ARA was the first aircraft radio receiver system
>> procurred after the change from two-letter to three-letter
>> nomenclature. ARB was the
>> second. ARC the third and ARD the fourth. Suffix numbers (as in
>> ARC-1 or
>> ARD-2) indicated modifications. Under this system, the first two
>> letters meant
>> Aircraft and Receiver. The third was just the next unused letter in
>> the
>> alphabet. Suffix numbers (as in ARC-1 or ARD-2) indicated
>> modifications. AFAIK,
>> the three-letter system went up to ARK, a glide bomb receiver. Under
>> the AN or
>> JAN system, the three letters indicated where used (aircraft), type of
>> emission (radio) and function (communication). The suffix number was
>> assigned
>> sequentially for differing equipment types (AN/ARC-1, AN/ARC-2,
>> ...AN/ARC-58, etc.).
>> Modifications were indicated by a suffix letter following the number.
>> Such
>> as AN/ARC-5X or AN/ART-13B. Use or not use of hyphens was also
>> generally
>> specifically specified in the controlling documents for the
>> nomenclature systems.
>> The JAN system has no hyphen in front of the mod letter. The Signal
>> Corps
>> system does. The Navy system, which used suffix letters to indicate
>> modifications to components (not systems) is indeterminent. Sometimes
>> the hyphen is
>> there and sometimes it isn't. Even in the same document.
>>
>> Anyway, probably more than you ever wanted to know about US Military
>> radio
>> system nomenclature. But as I said at the beginning and can support
>> with
>> (literally) tons of documentation, there was never any US Military
>> radio set or
>> receiver nomenclatured "ARC-5". ARC-1 is as far as that set ever got.
>> What
>> millions of lazy or simply misinformed people call "ARC-5" is actually
>> AN/ARC-5,
>> SCR-274-N, ATA or ARA, RAV, RAT or RAT-1.
>>
>>
>> In a message dated 3/2/2009 12:03:20 AM Central Standard Time,
>> grimm at sbc.edu
>> writes:
>>
>>> WA5CAB at cs.com wrote:
>>>
>>>> It was never anyone's designation. Never existed. But ARC is from
>>>> the
>>>>
>>> Navy
>>>
>>>> system for aircraft electronics, not the later JAN, etc.
>>>>
>>>> In a message dated 3/1/2009 10:52:57 PM Central Standard Time,
>>>> km1h at jeremy.mv.com writes:
>>>>
>>>>
>>>>> ARC-5 was not a Navy designation.
>>>>>
>>>>>
>>>> Robert &Susan Downs - Houston
>>>> wa5cab dot com (Web Store)
>>>> MVPA 9480
>>>>
>>>>
>>> I thought AN/ARC-5 was an Air Force designation.
>>>
>>> 73,
>>>
>>>
>> Robert & Susan Downs - Houston
>> wa5cab dot com (Web Store)
>> MVPA 9480
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--
Ken K4XL
k4xl at arrl.net
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