|To:||"joe sloss" <firstname.lastname@example.org>, <email@example.com>|
|Subject:||Re: [TowerTalk] DF Antenna|
|From:||Jim Lux <firstname.lastname@example.org>|
|Date:||Tue, 25 Jan 2005 09:23:05 -0800|
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?
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.
See: http://www.mscomputer.com for "Self Supporting Towers", "Wireless Weather Stations", and lot's more. Call Toll Free, 1-800-333-9041 with any questions and ask for Sherman, W2FLA.
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