[Milsurplus] WW2 Interception Receivers

[Al Klase]

Gang,

The Super-Pro seems to have been the preferred receiver to US Army 
intercept work, and a lot of other uses that didn't involve being 
outdoors.  I believe there was considerable government input on the 
original design.  The Britts used HRO's because it was what they could 
get.  The gear-driven single-dial does have an advantage when tuning 
back to a logged frequency, but none of the wartime shortwave receivers 
could be reliably set to a desired frequency without an external 
reference.  This problem wasn't solved until the introduction of the 
double-conversion with crystal-controlled first oscillator Collins 
products like the 51J in the post-war period.

Civilian government agencies seem to have had a fair number of SX-28's 
in intercept service, usually with a calibrator right next to the radio.

Al

On 5/14/2012 11:11 AM, C.Whitaker wrote:
> de WB2CPN
> Very true, the BC-779 Super Pro series was nice,
> but setting to a specific frequency<  (in the absence
> of a signal), required a transmitter or a freq meter.
> There was one other way, if a dependable signal
> was on the air.  Calibration was all relative.
> The Sig Corps had various types of National then.
> 73  Clete
>
>
> On 5/14/2012 10:59 AM, Jim Haynes wrote:
>> I read somewhere that the English intercept operation preferred the U.S.
>> Hammarlund HRO over all others.  But the item didn't say what was so
>> superior about the HRO.  I might speculate that being a single-dial
>> receiver rather than a two-dial receiver it was more accurately resettable
>> once a target frequency was found.
>>
>>
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-- 
Al Klase - N3FRQ
Jersey City, NJ
http://www.skywaves.ar88.net/