[Milsurplus] Collins 75A-4 Receiver Coverage

[Al Klase]

WA5CAB at cs.com wrote:
> I thought someone else would have asked this err now but the obvious 
> question is why buy the limited coverage 75A variant instead of the 
> 51J?.......
Hi Robert,

I think the answer is that the 75A was introduced in 1946.  (per Moore, 
3ed Edition)  This was the first commercial double-conversion superhet 
with a crystal controlled first oscillator.  This gave it unprecedented 
frequency accuracy.  The 51J was developed from the 75A and wasn't ready 
until 1949. 

Like someone said:  The 75A was a stop-gap measure for the military.  
They really wanted general coverage.

Regards,
Al

-- 
Al Klase - N3FRQ
Jersey City, NJ
http://www.skywaves.ar88.net/