[R-390] R-390 and CV-157 timeframe

[wb5uom at hughes.net]

I guess I was born a little too late to get to DO any of that neat stuff
back when.
 I wont bore you guys with how I got involved with hf radio, but YOUR
stories here are great.
keep it up.

David/WB5UOM
----- Original Message ----- 
From: "Roy Morgan" <k1lky at earthlink.net>
To: "Sheldon Daitch" <sdaitch at mor.ibb.gov>
Cc: <r-390 at mailman.qth.net>
Sent: Tuesday, May 20, 2008 4:15 PM
Subject: Re: [R-390] R-390 and CV-157 timeframe


>
> On May 20, 2008, at 9:03 AM, Sheldon Daitch wrote:
> > The CV-157 has an AFC circuit,
>
> I seem to remember someone who WAS there telling that the CV-157 came
> out after the R-390/URR but before the R-390A/URR. It was used in a
> diversity setup with two R-390/URR radios.
>
> > someone in systems design recognized a need for the AFC
> > circuit in the CV-157.
>
> I would guess that use of multi-channel, independent sideband RTTY
> broadcasts came after the R-390A was in use and available.
>
> The R-1051 and that monster National receiver with two cabinets
> joined above one another were designed with the needed stability
> built in.
>
> Also, Nike missile sites were equipped with transmitters (and
> presumably receivers) fed from a then state of the art master
> oscillator, known as The Sulzer frequency standard.  I'd guess that
> the Nike sites were silent, and maybe the central control stations
> were also, and they needed the transmitters and receivers to come up
> ON frequency, without doubt or any pre-broadcast frequency checks or
> tune-up periods.
>
> Roy
>
>
> Roy Morgan
> k1lky at earthlink.net
> Lovettsville, VA 20180
>
>
>
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