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HH With Magnetic Antenna

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gman4661

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How much improvement could I expect using a mobile magnetic mount antenna on my vehicle with a HH? I see that adaptors are available. Also, generally speaking, would a gain antenna really perform much better than a quarter wave?
 

gewecke

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You'll find it make a noticeable difference whether you're simplex or through a repeater.
I would suggest a Larsen NMO/450B. The gain figure is 4db.over a quarter wave antenna. This is what I use with rental cars.
n9zas
 

lmrtek

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Gain antennas can hurt more than help in some situations.
If you live where it's flat, gain antennas may work well
If however you are in hilly terrain, a simple 1/4 wave will outperform the 5 db antennas.

I never install an antenna with more than 3db gain on any police or fire vehicles and I prefer the 1/2
wave designs since they work well in ALL conditions.
 

gman4661

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That is very good information. Now I'm leaning toward a 3db gain antenna. I like the looks of the EM Wave EM-M10003. Anybody have an opinion of this antenna? Is this a half-wave antenna? Thanks!
 

gewecke

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Gain antennas can hurt more than help in some situations.
If you live where it's flat, gain antennas may work well
If however you are in hilly terrain, a simple 1/4 wave will outperform the 5 db antennas.

I never install an antenna with more than 3db gain on any police or fire vehicles and I prefer the 1/2
wave designs since they work well in ALL conditions.
Your theory depends on what band you're operating on. This may be true on vhf but not uhf due to line of sight considerations,FYI.
n9zas
 

gman4661

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I am specifically asking about UHF (GMRS). I live in an average suburban area that is somewhat hilly. Is the best choice a 3 db gain antenna?
 
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