[Premium-Rx] Frederick Electronics, MD

[Terry O']

I have thought of adding a page for manufacturers of receiver 
accessories if I stumbled on some compelling historical incident that 
made them attractive.

Spectrum displays are the main item I am considering as they are sexier 
than modems.  SDUs became an invaluable tool in SIGINT work.

I have a collection of material on Panoramic spectrum displays and 
analyzers, but little source material on their history.  It appears they 
made the first receiver spectrum display unit.  Most of my Panaromic 
material is from the 50s and 60s.  If anyone has anything connected with 
the WWII products like the PCA-2 T-200 (which Hallicrafters rebranded 
and sold as the common SP-44) please contact me.

As for modems and their cousins, multiplexers, I have a small collection 
of multiplexing units, manuals and sales information. They were the rage 
in the days before digital forms of multiplexing.

Up to this point, the CEI designed telephone multiplex receiving system 
is the only one for which I am developing web pages.  I have stories and 
photos of them installed in trucks and used to intercept terrestrial 
phone calls.  They would drive out and find choice spots to sit and 
siphon off signals from Ma Bell's microwave relay system.

Terry O'
http://watkins-johnson.terryo.org
http://BlackRadios.terryo.org




On 2/18/2013 2:52 AM, Peter Ratuschni wrote:
> Hello,
>
> the comrehensive manufacturer list on Terry`s new website makes me ask if Frederick Electronics can be added to the list.
> Maybe the were assimilated to one of the named companies? What I found is a product line called Frederick on the site of nsgdata.com.
>
> What they did in the past was at least FSK equipment but I guess there was a lot more. In my collection there is a dual LF spectrum monitor from Plantronics Frederick that I guess was an accessory to an receiver.
>
> - Peter
> ______________________________________________________________
>