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From: Philip de Cadenet
Subject: Re: More on HF DF (or ADF)
Date: Tue, 12 Nov 2002 20:34:27 +0000
NNTP-Posting-Date: 12 Nov 2002 20:44:00 GMT
User-Agent: Turnpike/6.01-U ()
>Nice for VHF and UHF but not easily scaled to HF due to the long
>The closest would be the No Such Agency's "Elephant Cages" at Udorn
>Thailand, Synop Turkey, etc etc. These were electrically steared arrays
>that took up lots and lots of real estate. I am sure the user interface has
>been modernized to a nice video display vs the old analog scopes.
I'll have to disagree with you there.
30 years ago when I was 16 and still wet behind the ears with regards
radio I dabbled with 807's on the AM broadcast band.
Now with a 1/4 wave inverted L plus waterpipe ground it comfortably hit
the 25 mile marker.
Late one night a local ham turned up on my doorstep (read that as 1am in
the morning). I had a cardiac when he asked if he could come in for a
cup of tea.
To cut a long story short he had a Perdio Marco Polo receiver, a 6 foot
vertical whip used as a sense antenna and a horizontally mounted ferrite
rod clipped to the car roof above the drivers door. All this equipment
went through some kind of phase comparator or whatever it was. He was
able to track stations single handed on any frequency from LF through HF
while on the move.
If this fella could do this in the 70's I'm damn sure you could put
something similar together now.
Philip de Cadenet G4ZOW
Transmitters 'R' Us
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