[Milsurplus] Navy Badged Collins Receivers

[Mike Morrow]

Phil wrote:

>The Air Force used A-4's and KWS-1's.  They had a slightly different
>band arrangement than the stock rigs.

Phil provided reference to an ebay picture and description of the USAF 75A-4:

http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=160311755914

It appears that the USAF version eliminated the two 10m bands, substituted
a 11 to 12 MHz band for the 11m band, and shifted down slightly the 1 MHz
coverage around the 15m band.

This animal is different from the ham 75A-4, but it is clearly labeled as
75A-4.  Still, this seems like it was a stop-gap solution to USAF SSB needs.

I supposed that the R-388/URR (51J) and R-390(*) were not used instead
by the USAF because they lack the "designed for SSB" capability of the 75A-4.

But, why wouldn't the USAF use the the R-390A with, say, the CV-591 SSB converter?
Too large and expensive???  I wouldn't think that would be an issue for the
Strategic Air Command.  I was in the USN ballistic missile submarine force and
funding in support of operations was never an issue.

Mike / KK5F