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#1
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Compact VHF fox hunting antenna
Is anyone aware of a small directional antenna that is useful for direction
finding at VHF? My understanding is that Doppler antennas work only while moving (true?) and what I need is a directional antenna that can be used while at rest. Low efficiency and relatively broad main lobe are OK as long as physical size is small. Thanks, George K6GW |
#2
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Build Moxen Rectangle. Search Google for "moxen calculator".
KF On Wed, 10 Mar 2004 16:41:20 GMT, "George" wrote: Is anyone aware of a small directional antenna that is useful for direction finding at VHF? My understanding is that Doppler antennas work only while moving (true?) and what I need is a directional antenna that can be used while at rest. Low efficiency and relatively broad main lobe are OK as long as physical size is small. Thanks, George K6GW |
#3
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On Wed, 10 Mar 2004 22:12:51 -0500, Stevens
wrote: Build Moxen Rectangle. Search Google for "moxen calculator". KF On Wed, 10 Mar 2004 16:41:20 GMT, "George" wrote: Is anyone aware of a small directional antenna that is useful for direction finding at VHF? My understanding is that Doppler antennas work only while moving (true?) and what I need is a directional antenna that can be used while at rest. Low efficiency and relatively broad main lobe are OK as long as physical size is small. Thanks, George K6GW George, You can find a Moxon at this site, as well as a ton of other great antenna info. http://www.cebik.com/radio.html Howard |
#4
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George wrote:
Is anyone aware of a small directional antenna that is useful for direction finding at VHF? My understanding is that Doppler antennas work only while moving (true?) and what I need is a directional antenna that can be used while at rest. Low efficiency and relatively broad main lobe are OK as long as physical size is small. Thanks, George K6GW Have a look at the HB9CV designs. The physical size is quite small and mechanical construction is not difficult. I have a commercial one for 70cm at it works well and is small and easy to work with. Here a link to a fellow ham who publishes instructions and drawings: http://www.davidkearns.co.uk/g8tti/HB9CVdetails.htm Markus -- Markus Baertschi Phone: ++41 (21) 807 1677 Bas du Rossé 14b Fax : ++41 (21) 807 1678 CH-1163, Etoy Email: Switzerland Homepage: www.markus.org |
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