Tape Measure Yagi Construction & RDF stuff
Constructing a Tape Measure Yagi Antenna
For Hidden Transmitter Hunting
or Fox-Hunting
For Hidden Transmitter Hunting
or Fox-Hunting
Construction plan written and photographed by Tom Niderost, K4TMN
Original plan found on Joe Leggio's (WB2HOL) website
Additional design modifications (handles on each end) by Andy Woolard, AA4XS
Original plan found on Joe Leggio's (WB2HOL) website
Additional design modifications (handles on each end) by Andy Woolard, AA4XS
Check out this item for you T-hunt equipment! It can be found on E-Bay for around $20
Search --- "Fox Hunt Offset Attenuator ASSEMBLED"
Search --- "Fox Hunt Offset Attenuator ASSEMBLED"
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Use this little device along with your beam or phased antenna to help locate a hidden transmitter within a few feet. The device works by mixing a variable amplitude 4MHz oscillator with the incoming antenna signal to generate a weaker signal at +/-4MHz intervals from the original signal. Makes a great club project by using this offset attenuator with a tape measure beam!
This is the same as our Fox Hunt kit but FULLY ASSEMBLED and ready to use. Assembly does not include case, antennas, cables, or power supply(battery). Instructions can be downloaded at KC9ON. |
Watch the video for all the scoop!
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Radio Direction Finding Stuff Page by Joe WB2HOL
RADIO DIRECTION FINDING PROJECTS
Hidden Transmitter Hunting has been one of the aspects of amateur radio which always interested me. I have built many projects over the years and have placed construction details for a few of them here. I will add to this collection as I find the time to build the web pages (and the projects). I hope you enjoy these as much as I have.
If you construct any of these projects or improve on any of my ideas, feedback is desired. I would love to hear from other RDF fans. If you find anything which is either incorrect or misrepresented, send me a note and I'll make the corrections as appropriate.
73, Joe WB2HOL
Compass by
Wilderness Elite
Send E-mail to me :wb2hol@theleggios.net
Hidden Transmitter Hunting has been one of the aspects of amateur radio which always interested me. I have built many projects over the years and have placed construction details for a few of them here. I will add to this collection as I find the time to build the web pages (and the projects). I hope you enjoy these as much as I have.
If you construct any of these projects or improve on any of my ideas, feedback is desired. I would love to hear from other RDF fans. If you find anything which is either incorrect or misrepresented, send me a note and I'll make the corrections as appropriate.
73, Joe WB2HOL
Compass by
Wilderness Elite
Send E-mail to me :wb2hol@theleggios.net
An Offset Attenuator for Radio Direction Finding
Near the end of a transmitter hunt, when the hunter is within a mile or so of the hidden transmitter, the signal
level will often exceed the maximum level that a receiver's signal strength indicator can register. The S-meter
is "maxed out" and is useless for indicating changes in signal strength. When this occurs a passive resistor
network is often used to knock the signal strength down to a useful level.
By Charles Scharlau, NZØI
Revised: Wednesday, February 28, 2001
level will often exceed the maximum level that a receiver's signal strength indicator can register. The S-meter
is "maxed out" and is useless for indicating changes in signal strength. When this occurs a passive resistor
network is often used to knock the signal strength down to a useful level.
By Charles Scharlau, NZØI
Revised: Wednesday, February 28, 2001