[Milsurplus] Before the 75A1, there were ...

[Al Klase]

Nick,

Thank you for this link.  Raymond Moore in "Communications Receivers"  
had the 51J not appearing until 1949, after the 75A (1946).  This never 
made sense to me.

Moore does identify some other pre-75A receivers:

51F    1939         Fixed frequency

51Q    1940        a.k.a. TCS - COL-46159        Standard 1930's 
superhet architecture.

51H    1944        a.k.a.   R-105/ARR-15          PTO local oscillator.  
Harmonics thereof used fro higher bands

51J      1945        (corrected date)                    Double 
conversion.  Xtal controlled 1st osc.   PTO 2nd osc.

Of course, the 51J established the architecture used in the R-390, 
R-383, R-648/ARR-41, 51S1, etc.

Al

On 11/30/2012 10:25 AM, Nick England wrote:
> AN/ARR-15 (is that the ART-13 mate you were thinking of?)
> http://www.radiomilitari.com/arr15.html
>
> I thought the 51J came before the 75A? - there is a web site that
> claims the 51J was used during the war. There is also an 11/45 ad
> listing the 51J
> http://www.museumofbroadcasting.org/Collins51j.html
>
> Cheers,
> Nick K4NYW
>
> On Fri, Nov 30, 2012 at 9:45 AM, John Hensley <w5jv at hotmail.com> wrote:
>> I'm wondering if anyone can list the receivers that Collins made prior to the 75A1which came out immediately after the war.
>>
>> Other than the 70E8 PTO & dial kit, I'm not aware of any civilian type sets.  There was of course the mate to the ART-13 and perhaps the TCS set.  There was the ARC-21 (transceiver) and its update the ARC-65.
>> If anyone has a list in mind of the Collins receivers prior to the A1, please share with the list.
>> Thanks in advance
>> John W5JV
>> ______________________________________________________________
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-- 
Al Klase - N3FRQ
Jersey City, NJ
http://www.skywaves.ar88.net/