[R-390] Space diversity reception

[Nick England]

Not specifically R-390A, but several guys on our 40m RTTY net have
experimented and found space diversity really helps a lot.
Not sure what your application is, but continuous signal RTTY is a good
test case.

A standard military setup for RTTY was dual-diversity R-390A receivers with
the FSK converter selecting the strongest signal.

The Navy AN/FRR-49 used the AN/URA-8 AFSK converter (two converters plus a
comparator)
http://www.navy-radio.com/commsta/r390-cv89-01.jpg

The Army AN/FRR-38 used two R-390 plus a CV-116 converter/comparator
http://www.navy-radio.com/rcvrs/images/frr38-03.JPG
http://www.navy-radio.com/rcvrs/images/frr38-02.JPG
http://www.navy-radio.com/rcvrs/images/frr38-01.JPG

Some more diversity receivers at
http://www.navy-radio.com/rcvr-div.htm

Nick England K4NYW
www.navy-radio.com


On Sat, Feb 15, 2025 at 12:40 PM Byron Tatum <bjtatum1 at att.net> wrote:

> Hello-   I have been searching for some additional info regarding space
> diversity reception using a pair of R-390A's. Does anyone know of someone
> who has experimented with this and has some information?Thanks,Byron W5FH
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