Best 2M antenna for atv ?
I want to mount a 2 meter rig on my Honda Foreman ATV. I want a high-gain antenna, either a 5/8 wave or possibly a collinear. I would like to stay around 4 to 5 feet in length, but it is possible that a collinear would be longer. Any recommendations on this ? I know that an atv would not provide much of a ground plane, so I think a 1/4 wave would be out of the question. Any recommended "type" (wavelength, etc) and brand for this use ? Thanks for any comments !! 73 de Jim K4PYT |
Best 2M antenna for atv ?
I use a lakeview colliner at both my home qth and on my truck. It is rugged
but a bit long. http://www.hamstick.com/9007.htm Great 2m antenna.. Joe "James" wrote in message . .. I want to mount a 2 meter rig on my Honda Foreman ATV. I want a high-gain antenna, either a 5/8 wave or possibly a collinear. I would like to stay around 4 to 5 feet in length, but it is possible that a collinear would be longer. Any recommendations on this ? I know that an atv would not provide much of a ground plane, so I think a 1/4 wave would be out of the question. Any recommended "type" (wavelength, etc) and brand for this use ? Thanks for any comments !! 73 de Jim K4PYT |
Best 2M antenna for atv ?
James wrote:
Any recommendations on this ? I know that an atv would not provide much of a ground plane, so I think a 1/4 wave would be out of the question. For optimum performance, a 5/8WL needs a better ground plane than a 1/4WL. I once provided four radial whips attached to the luggage rack on my motorcycle which worked with a 1/4WL vertical. It performed well. Any recommended "type" (wavelength, etc) and brand for this use ? On my bicycle, I use a J-Pole made out of ladder-line. It is attached to a fiberglass bicycle flag pole. It doesn't need a ground plane. This should work well on an ATV. You may even already have the fiberglass flag as is required when riding on many beaches. -- 73, Cecil http://www.w5dxp.com |
Best 2M antenna for atv ?
Hi Jim
Keep in mind that if you are doing a lot of off-road the high gain antenna, normally optimized to radiate towards the horizon, ends up skying or firing most of it into the ground. This is why for example a 1/4 wave is great in city "canyons" and mountainous areas. The "all around" radiation has a better chance of reflecting off something above you. You can always make a wire etc counterpoise for the 1/4 wave. Any effective collinear is going to be big to do well. Its also going to be somewhat whippy. A 1/2 over 1/4 or 5/8 over 1/4 you can work out how big that will be. This kind of antenna will need a ground plane so maybe you could look at a 1/2 over 1/2 voltage fed. This will be over 6ft long! I saw a 1/2 wave voltage fed antenna once made up like a slim jim. It had two parallel spring steel conductors about 4-5ft long and half n inch apart. It was very effective. It was fed about 2" from the bottom (the lower 1/3 of the antenna being the matching section - which also raised the antenna height some) If you want to experiment (with something that will eventually break) consider some 300 ohm ribbon inside 3/4" plastic conduit. Apologies for not giving any specific brand details. I tend to make my own... Cheers Bob VK2YQA James wrote: I want to mount a 2 meter rig on my Honda Foreman ATV. I want a high-gain antenna, either a 5/8 wave or possibly a collinear. I would like to stay around 4 to 5 feet in length, but it is possible that a collinear would be longer. |
Best 2M antenna for atv ?
Thanks to both Merlin and to Cecil. Well, I thought that a 1/4 wave
would rely on a good ground plane more than a 5/8 wave antenna would. I will have to consider that. As for a J-Pole, I really don't think that is a high-gain antenna , is it ? My thinking has been that it is primarily a dipole, mounted vertically. Thanks again !! 73 de Jim K4PYT |
Best 2M antenna for atv ?
James wrote:
As for a J-Pole, I really don't think that is a high-gain antenna , is it ? My thinking has been that it is primarily a dipole, mounted vertically. A 1/4WL is not a high-gain antenna either. Neither is a 5/8WL with a non-optimum ground plane. A J-Pole has essentially the same radiation pattern as a 1/4WL ground plane but it doesn't need a ground plane. If you want gain and are willing to provide an optimum ground plane on your ATV, then there are phased-array gain antennas available, e.g. the Diamond 97 inch NR22L with an advertised gain of 6 dBd. -- 73, Cecil http://www.w5dxp.com |
Best 2M antenna for atv ?
A good choice for vehicles without adequete ground plane would be the
!/2 wave end fed antenna that does NOT require any ground plane. One such antenna he www.comtelco.net A1812A 44 Also can be orderd with the heavy duty .125 dia whip, The whip is about 39" tho. The radiation pattern is the same as a 1/2 wave dipole and much the same as the 1/4 wave whip. |
Best 2M antenna for atv ?
Barry OGrady wrote in
: On Sat, 18 Nov 2006 08:51:28 -0500, "James" wrote: I want to mount a 2 meter rig on my Honda Foreman ATV. I want a high-gain antenna, either a 5/8 wave or possibly a collinear. I would like to stay around 4 to 5 feet in length, but it is possible that a collinear would be longer. Which metre band is it for, and what are the meters used for? Golly Gosh Barry! Mention meters, and you pop right up. FWIW, from the Merriam Webster dictionary: Main Entry: me·ter Function: noun Etymology: French mètre, from Greek metron measure : the base unit of length in the International System of Units that is equal to the distance traveled by light in a vacuum in {frac;1;299,792,458} second or to about 39.37 inches -- see METRIC SYSTEM table Any recommendations on this ? I know that an atv would not provide much of a ground plane, so I think a 1/4 wave would be out of the question. Any recommended "type" (wavelength, etc) and brand for this use ? Thanks for any comments !! Is there amateur TV on 2 metres? 73 de Jim K4PYT dit dit dit dah dit dah dit dit good buddy. Jim's a fairly new Ham, seems like he's asking legit questions to me. - 73 de Mike KB3EIA - |
Best 2M antenna for atv ?
"Will" wrote in news:1163889515.013109.230270
@h48g2000cwc.googlegroups.com: A good choice for vehicles without adequete ground plane would be the !/2 wave end fed antenna that does NOT require any ground plane. One such antenna he www.comtelco.net A1812A 44 Also can be orderd with the heavy duty .125 dia whip, The whip is about 39" tho. The radiation pattern is the same as a 1/2 wave dipole and much the same as the 1/4 wave whip. That antenna is a pretty good choice. I'd add that if Jim wanted to try a 1/4 wave it might work, because he could catch a ground plane through the frame. That is where most mobile antennas get their "ground". - 73 de Mike KB3EIA - |
Best 2M antenna for atv ?
You might want to try a 1/2 antanna which does not require a ground
Adair "James" wrote in message . .. I want to mount a 2 meter rig on my Honda Foreman ATV. I want a high-gain antenna, either a 5/8 wave or possibly a collinear. I would like to stay around 4 to 5 feet in length, but it is possible that a collinear would be longer. Any recommendations on this ? I know that an atv would not provide much of a ground plane, so I think a 1/4 wave would be out of the question. Any recommended "type" (wavelength, etc) and brand for this use ? Thanks for any comments !! 73 de Jim K4PYT |
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