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Author Topic: Metal plate with suction cups for mobile magmount antenna  (Read 1053 times)
N2LWE
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Posts: 104




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« on: November 13, 2012, 02:40:27 PM »

Ok, I've been trying to figure out a way to install a 2m/440 mobile antenna to my new car with a glass roof. The gutter or lip mounts won't work, there is no edge to the glass roof to mount to and don't want to crack the glass anyway, so here's what I'm thinking, if I had a square piece of metal with four suction cups I can place this on top of the glass roof and simply put my magmount on top of the metal plate. Does anyone know who might sell such a thing (metal plate with suction cups) that can sit right on top of the roof? I can probaly make one and dip it in a plastic so if it came loose it wouldn't scratch the car, but if I can simply buy one I'd rather do that.
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AC4RD
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« Reply #1 on: November 13, 2012, 03:00:54 PM »

You might want to ask on eham's "Mobile" forum--lots of experienced mobilers there!

I
73 GL!
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N2LWE
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« Reply #2 on: November 13, 2012, 03:17:41 PM »

Sorry, I re-posted it there.
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WX7G
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« Reply #3 on: November 13, 2012, 04:48:11 PM »

Good idea! If the suction cups are tacked to the glass with super glue I think it will stay on. Auto stores sell this for gluing rearview mirrors to the windshield.

The metal plate should have a radius of 19 inches to form a proper counterpoise. This is a bit large. Instead, it can be 6" x 6" with two opposing radials attached that measure 38" from the end of one to the end of the other. Number 10 solid copper wire radials might hold up at highway speeds.

This would make a nice article for eham.net.
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KG4RUL
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« Reply #4 on: November 14, 2012, 09:45:55 AM »

If you do this, make sure you have a lanyard firmly attached to antenna and the car for when it comes loose (it will).
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N6AJR
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« Reply #5 on: November 14, 2012, 11:56:08 AM »

Go under the back end of the car and attach a bar or plate sticking out from under the bumper, bolted or welded to the frame.  mount your antenna on this. 

if you are only using a small 2 meter antenna you could use a license plat mount, which set in behind the reap plate, or even a light weight trailer hitch and mount your antennas on the stinger.
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