[R-390] Tell me about Single Sideband Converters

[John Kolb]

The CV-157 wasn't really intended as a voice SSB converter - it was 
intended for applications where
a pilot carrier was transmitted. By phase locking to the pilot, the 
transmitted audio frequencies
were recovered  within a couple of hertz of error. We had a couple 
aboard the USS Providence
in the Navy for use in receiving multiplex RTTY transmissions. These 
had, as I recall, an 85 hZ shift,
so the receiver had to be pretty exact. I believe a set of two CV-157 
and two R-390s in a single
rack was known as a FRR-39. The production numbers for these would have 
been very low. No the
other hand, many of the R-390's I saw aboard ship (early/mid 60's) were 
in a cabinet along with
TWO CV-591's.

John
http://www.jlkolb.cts.com

Craig wrote:

>Hey guys. Thanks for all the replies. I see Rick Mish works on these models - CV-591A, CV-657A, CV-1722A and CV-1758A. Is there a big difference between them in ease of use and reliability?
>
>I was told that the CV-157 was "the best", but that they are impossible to find.
>
>Looks like the CV-591A is the most common and probably easiest to find parts for. Anyone have a picture of the inside of one of these?
>
>Thanks
>
>  --
>
>  Craig Westerman
>  westerman at cableone.net
>
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