Jump to content
Sign in to follow this  
Followers 0
Lost Brews

Fox Hunting Antenna

Recommended Posts

Does anyone have a simple design for Fox Hunting Equipment that can be built very inexpensivley?


I made a simple 3 element 2 meter beam.


I had some aluminum rod 1/8" or so laying around. Your center element is a dipole - fed it to a pl-259 base mounted on a piece of Plexiglas. The mast or center was 1/2 plastic pipe or conduit.


The other are shorter and longer appropriately.


There are dimensions on the web I'm sure. I did mine when the web was not NEAR as poular as now.


I was going to build one with some old collapsing antennas I got at a hamfest, but never did.


You could also buy a beam - but making one takes less than a 1/2 hour if you have the parts.


If you don't xmit dimensions are not to critical.


Add more elements to be more directional.


http://home.att.net/~jleggio/projects/rdf/tape_bm.htm has one made from a tape measure.


de N8PFF

Share this post

Link to post

Does anyone have a simple design for Fox Hunting Equipment that can be built very inexpensivley?

When I used to T-Hunt with friends we had a 3 element yagi that we mounted on PVC pipe, it was at a slight angle as well. il see if i can find some pics...

Share this post

Link to post

I've had plenty of success with a simple 2m dipole mounted horizontally on a stick at the end of a pole (sort of a T-shaped apparatus with the dipole on the cross-bar).


To DF, I spin the dipole around and look for the null/lowest signal - that's where one end of the dipole is pointing at the transmitter. Do it from 2-4 points and plot the lines on a map (in both directions from my location) and you get a pretty accurate position on the transmitter.


In events we've had around here I was always an early finder.


Total cost - about $5 worth of coax, about $0.25 worth of wire, about $5 worth of dowels and glue, and a $10 1:50000 scale topo map with UTM grid. My original one was built on some prop spear from a cowboys and indians costume set, and was nicknamed "The Tomahawk Special" by local hams. And despite its low-tech origins, I could still beat most of those doppler and phased array boys to the transmitter.


In fact, you can get 3 people with this setup to deploy in a triangle sort of arrangement within your search area, each one taking a bearing, one guy plots the lines and all drive to the resulting intersection (probably ~50-100m circle), then the three spread out with 20dB attenuators on and zero-in on the thing. You'll actually spend more time driving than tracking down the transmitter.

Edited by geoSquid

Share this post

Link to post

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.

Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

Sign in to follow this  
Followers 0

  • Create New...