Re: [TowerTalk] DF Antenna

[Jim Lux <jimlux@earthlink.net>]

At 08:20 AM 1/25/2005, joe sloss wrote:
> This may be stretching "antennas" a bit but....    I'm in need of 
> small  "one-hand" carried portable antenna that can be used in the 3-4 MHz 
> range to hunt down a persistent noise at my QTH.  I'd prefer to use it 
> with my Davco DR-30 rather than buy a small portable SW radio.  Any design 
> ideas?
>
> Thanks, Joe k7mks


Since you want some directionality, and it's not for Tx, why not a tuned 
loop?  Wind a bunch of turns of some fairly small wire on a suitable frame 
(a square a few feet on a side) and tune it with a 365pf cap.

The advantage of a loop in this situation is that it has a very sharp null 
(broadside to the loop), which makes DF'ing a bit easier.




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