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700 trunking antenna on a fiberglass boat roof

Posted: Mon Aug 19, 2019 2:53 pm
by Jim202
Looking for some information feedback on installing a standard mobile 700 trunking antenna on the roof of a boat? My thoughts are to use a thick NMO mount with a metal plate on the underside of the roof. Roof is about 3/16 to 1/4 inch thick.

Jim

Re: 700 trunking antenna on a fiberglass boat roof

Posted: Tue Aug 20, 2019 9:37 am
by Karl NVW
Same rules still apply that you used to follow on HB, UHF, or 800 MHz in this situation. A thick NMO with metal foil tape (or an 11" aluminum pie plate) on the underside of the roof will get you there. If you are installing on a vessel that runs in rough water, use only the quarter-wave "spike", not a 3 dB pigtail or other gain models.

Re: 700 trunking antenna on a fiberglass boat roof

Posted: Fri Aug 23, 2019 8:44 am
by Jim202
Sorry for the delay in posting a reply. There was a lightning strike that took out my Internet connection. Made it back to operational status.

Thanks for the confirmation of my plans.

Jim

Re: 700 trunking antenna on a fiberglass boat roof

Posted: Fri Aug 23, 2019 10:25 am
by Karl NVW
And I too am sorry that as usual I was overthinking the math. Adjust the size of the aluminum foil pie plate to USA food industry standard size of NINE inches. When you squash it flat and duct-tape it to the underside of the cabin roof it will be almost perfect. Or you can use a metal pizza pan 12" or larger.

Re: 700 trunking antenna on a fiberglass boat roof

Posted: Sat Aug 24, 2019 8:29 am
by wd9cms
The PCTEL K332 is a ground plane intended for mounting antennas to fiberglass vehicles and are usable from 406-1000 MHz. this is a link to the K332:

https://www.talleycom.com/viewProduct?rlProdNum=MXRK332

This should provide a professional installation on the boat with a thick mount cable assembly...

Bill

Re: 700 trunking antenna on a fiberglass boat roof

Posted: Tue Sep 17, 2019 8:03 am
by wavetar
FYI, PCTel also offers no ground plane antennas. We have found the 700MHz version to work very well:

https://www.pctel.com/antenna-product/n ... gp-series/