[GreenKeys] CV-483

[Bob McConnell]

Larry Tighe wrote:
> Got my second CV-483 today from eBay...worked great.  Now to hook it up 
> for diversity.  Looks pretty simple to do.
> 
> Anyone running a pair in diversity these days?  W1AW comes thru so 
> strong here in NJ on 80 meters, there's seldom a fade.
> 
> What's the procedure for diversity....receive on 40 and 80 or receive on 
> 80 with two different antennae?  I suspect the latter.

Larry,

I'm stretching the memory cells here, but the basic idea the Navy taught 
me about diversity was to receive the same signal on two frequencies. 
The diversity units actually worked on signal strength. We set all 
receivers' output to 0 dBm, so when one faded, the other would still 
provided clean copy. It was very seldom that both would fade 
simultaneously. Although, if you weren't paying attention, the second 
might fade out after the first was long gone. You could also QSY one 
receiver while the other kept copying the signal. It was standard 
practice to keep two receivers up on the multi-channel broadcasts, which 
were commonly transmitted on five frequencies simultaneously. Diversity 
on single channel signals wasn't as common. Of course, it was relatively 
easy with synthesized receivers locked to a stable frequency standard. 
The R-1051B was the most common HF receiver of that era in the tin-can 
service.

Bob McConnell
N2SPP
Ex-RM2, NFIT 1970-74, NLM 74-77