[R-390] R-390A Cost Reduction and Improvements (was dead horse Hi)

[Llgpt1@aol.com]

In a message dated 6/11/2003 4:32:34 PM Central Daylight Time, 
chacuff@cableone.net writes:

> Adapting an R-390\URR IF deck to an R-390A\URR is not at all unrealistic.
> Seems I remember the Military had it done because of the phase shift
> problems the mechanical filters created in diversity operations.  There is a
> military designation for it...I just can't remember it at the moment.
> Someone on this list did the conversion just in the last few months....I
> remember the posts....
> 
> Les Locklear...Chime in here anytime I know you have the info on it!
> 
> Finding a source for R-390\URR IF decks is the biggest problem! (maybe
> that's what you meant by unrealistic)
> 
> Cecil...
> 

It was the R-725/URR. which used the R-390A and a modified version of the 
R-390/URR if deck. The mechanical filters caused a phase shift in the df 
equipment which was small at the antenna, but when extrapolating it out to the source, 
it could have amounted to hendreds of miles in error. Servo Corp. of America 
manufactured the if decks (interesting fact that they were located in the 
Richmond Hill area of Long Island) this area wa also the home of several other 
defense related industries, such as American Trans Coil.

My good friend Tom Marcotte N5OFF documented this in Electric Radio several 
years ago.


Les Locklear
Gulfport, Ms.


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