[RFI] 160m ARDF / fox hunt antenna

N1BUG paul at n1bug.com
Fri Nov 30 11:53:41 EST 2012


Thanks! I just threw one of these together and it works! I can hear 
the noise in question re-radiating from my 160 vertical while 
standing 7 or 8 feet away. That's not far, but considering this is 
re-radiation from a source at least 700 feet away (probably more) 
I'm hoping it will be sensitive enough to hear the source when I get 
close enough to it. I have no idea what it is I'm chasing. The loop 
has a nice figure 8 pattern "as advertised".

After a quick lunch I am headed off to see if I have any luck 
finding this noise...

73,
Paul N1BUG


On 11/30/2012 08:50 AM, K1TTT wrote:
> I use a simple loop.  A half dozen turns of leftover insulated copperweld
> about 18" in diameter taped to a fiberglass electric fence rod.  Directly
> attach rg-58 or 8x coax and wind as many turns as possible through a big
> ferrite to make a choke for the feedline.  Gives a nice figure 8 pattern but
> pretty low sensitivity.  maybe add a preamp for weaker signals?   maybe more
> turns would be more efficient?
>
> David Robbins K1TTT


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