[R-390] Royalty and R-390A

[Roger Ruszkowski]

Dave,
 
You ask, Why two?
 
Diversity. Two different antennas to cover fade.

Diversity. Two different frequencies maybe mega hertz apart to cover fade.
 
Too listen to both ends of the conversation.
Back when things were rock bound the exchange may have been on two different frequencies that were not even close together.
 
Base control and subordinates often worked on different frequencies.
 
If there were only receiver then the position was for intercept work.
Once you found a station you went to the other receiver and went looking for his buddies.
Maybe up the chain of commend or down the chain of command on another frequency.

We still work dual frequency on assigned nets for duplex operation.
Lots of RTTY with both ends sending and receiving at the same time.

Lots of relay operation where it was received and then retransmitted on an adjacent frequency.
 

Roger AI4NI

 
-----Original Message-----
From: Dave Merrill <r390a.urr at gmail.com>
Cc: R-390 HF Receiver List <r-390 at mailman.qth.net>
Sent: Sat, Nov 22, 2014 3:07 pm
Subject: Re: [R-390] Royalty and R-390A


Appears that the cabinets can hold two CV-591s in addition to the R-390A -
neato setup!  Begs the question - why two?

Dave
N9ZC

On Sat, Nov 22, 2014 at 1:53 PM, Nick England <navy.radio at gmail.com> wrote:

> 1960 - King Olaf V of Norway is introduced to a couple of R-390As aboard
> USS Northampton.
> http://www.navy-radio.com/ships/cc1/clc1-1960-book-03.jpg
>
> Cheers,
> Nick England K4NYW
> www.navy-radio.com
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