[Milsurplus] Alexanderson alternator on Xmas eve

[Al Klase]

Agreed! My loop works better than any wire I have 
room for. -Al

C. Whitaker wrote:
> de WB2CPN
> In USAF at Andrews AFB we began the project to copy
> Marion MA on 25.8, sending 60 WPM teletype, in order
> to experiment with receivers along the northern edge of
> Alaska and Canada. First we used an RBA we got from
> the Navy, and a very long antenna which went into the next
> county. Then the RCAF gave us a "Hinge Pulse Detector"
> which worked much better. It was a 1 meter square shielded
> loop with built-in tuneable RF Amps followed by a up
> converter that give an output of around 250 KHz. This was
> fed to a modified BC-779 in the main operating area,
> and then to a teletype demodulator that went to the printer.
> Sometime after this I was transfered to Elmendorf AFB
> in Alaska, and naturaly got back on the project. The
> engineers did extensive signal measurements 24/7. This
> was during the building of the Dew Line, and for all I know
> the equipment could all be in some surplus shop to this day.
> TRIVIA What I'm hinting at: you can do it without a large
> outside antenna if you can make a good tuned loop with
> built-in amplifiers. (Max signal is in the plane of the loop.)
> 73 Clete
>
>
>
>
> ______________________________________________________________
> Milsurplus mailing list
> Home: http://mailman.qth.net/mailman/listinfo/milsurplus
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:Milsurplus at mailman.qth.net
>
>

-- 
Al Klase – N3FRQ
Flemington, NJ
http://www.skywaves.ar88.net/