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Author Topic: Antenna for Scooter Topcase  (Read 2789 times)
KK4GGL
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Posts: 146




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« on: January 01, 2014, 07:27:52 AM »

I have a 500cc Kymco scooter. I'd like to be able to mount an antenna on my top case/trunk for use with my Baofeng UV-5R.

First the antenna itself. I have a small  antenna for handhelds, but it is magnetic mount. Does anyone know of either an antenna for handhelds that is not magnetic mount, or a smallish 2 meter antenna I can mount on my top case. I am worried that the wind on the antenna may eventually crack the case.

Second, the ground plane. I am thinking of putting copper foil tape strips, or taping wire on the inside of the lid. Does this seem to be adequate for a 2 meter ground plane?

Any and all help appreciated.
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73,
Rick KK4GGL
K1CJS
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Posts: 5889




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« Reply #1 on: January 01, 2014, 07:53:53 AM »

After everything is said and done, you may be better off just getting a good rubber duckie for your HT.  Buy or rig a 'holster' for it attached to your handlebars, and a clip to ground the HT case to the scooter frame.  You won't have to worry about the antenna breaking off, or anyone taking it off that way.
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KK4GGL
Member

Posts: 146




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« Reply #2 on: January 01, 2014, 08:17:09 AM »

After everything is said and done, you may be better off just getting a good rubber duckie for your HT.  Buy or rig a 'holster' for it attached to your handlebars, and a clip to ground the HT case to the scooter frame.  You won't have to worry about the antenna breaking off, or anyone taking it off that way.

That may well be true. I'd also have to remember to remove the antenna before I put the cover on. It's not too easy to attach things to the handle bars on a Xciting 500.

Thanks for the reply.
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73,
Rick KK4GGL
KB4QAA
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Posts: 2298




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« Reply #3 on: January 01, 2014, 10:05:22 AM »

Just order an "NMO" mounting kit from any ham dealer and a 1/4 wavelength antenna.

 Yes, copper foil, or even wire will work as a ground plane. A simple 'X" layout is typical. Length is not critical , but at least equal to the length of the antenna is best.  That is how antennas are installed on fabric covered airplanes since the 1930's. 
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KK4GGL
Member

Posts: 146




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« Reply #4 on: January 01, 2014, 06:32:32 PM »

Just order an "NMO" mounting kit from any ham dealer and a 1/4 wavelength antenna.

 Yes, copper foil, or even wire will work as a ground plane. A simple 'X" layout is typical. Length is not critical , but at least equal to the length of the antenna is best.  That is how antennas are installed on fabric covered airplanes since the 1930's. 

Thanks for the info. I'll look at the NMO mounts.
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73,
Rick KK4GGL
K1CJS
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Posts: 5889




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« Reply #5 on: January 01, 2014, 10:25:19 PM »

Another factor you may want to think about is that top case size.  For a ground plane to work properly, the measurement of the 'x' should be 38" by 38" with the 19 inch antenna mounted in the center.  I doubt if that top case measures 20" by 20"--about half the size that is really needed.  Yes, a smaller size ground plane would work, but not as well as it should.

If you really do want to go the route of an antenna separate from the HT, consider a half wavelength antenna--which won't need the ground plane, but may well be much more expensive. 

Oh yes--You're welcome!  73!
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K0JEG
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Posts: 639




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« Reply #6 on: January 02, 2014, 05:44:57 AM »

Another vote for a 1/2 wave antenna like the Diamond NR770 series:

http://www.eham.net/reviews/detail/2902

I've used one on the back of a bicycle in fringe APRS areas with very good results after having one mounted on my car for decades now. No ground plane needed.

Other manufacturers make them as well. Some people say other brands are better, I've had good luck with anything from Diamond over the years.
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