cliff Posted November 27, 2020 Report Posted November 27, 2020 Another question...I have my GMRS antenna mounted on my roof rack on my Jeep JL. The roof of the Jeep is fiberglass. The roof rack crossbars are aluminum. I have the antenna mounted to the crossbar on an approximately 8" long 3" wide 1/4" thick piece of steel. Should I run a ground wire from the steel mount to the frame of the Jeep? I know with CBs this helps but not sure about GMRS. Thanks Quote
1URFE57 Posted November 27, 2020 Report Posted November 27, 2020 Another question...I have my GMRS antenna mounted on my roof rack on my Jeep JL. The roof of the Jeep is fiberglass. The roof rack crossbars are aluminum. I have the antenna mounted to the crossbar on an approximately 8" long 3" wide 1/4" thick piece of steel. Should I run a ground wire from the steel mount to the frame of the Jeep? I know with CBs this helps but not sure about GMRS. ThanksYou're good to go no need for ground wire there, aluminium is a conductor so your setup will work just fine. Quote
cliff Posted November 27, 2020 Author Report Posted November 27, 2020 You're good to go no need for ground wire there, aluminium is a conductor so your setup will work just fine. Thanks for the response, much appreciated Quote
dwmitchell61 Posted December 2, 2020 Report Posted December 2, 2020 25-3/4" sheet metal disk atop the roof, properly grounded, and under the antenna mount will provide a one wavelength diameter ground plane for optimal operation. The ground plane "mirrors" the antenna element to create the second element of a "virtual" electrical dipole antenna. Quote
cliff Posted December 2, 2020 Author Report Posted December 2, 2020 25-3/4" sheet metal disk atop the roof, properly grounded, and under the antenna mount will provide a one wavelength diameter ground plane for optimal operation. The ground plane "mirrors" the antenna element to create the second element of a "virtual" electrical dipole antenna.Thanks. Maybe that will be my next project. Working much better with the 6db antenna though. Quote
1URFE57 Posted December 3, 2020 Report Posted December 3, 2020 Thanks. Maybe that will be my next project. Working much better with the 6db antenna though. Just keep experimenting this is what radio hobby is all about playing with antennas, if you have your ham license more antenna to play with. Quote
uplander Posted December 12, 2020 Report Posted December 12, 2020 I have a Jeep Gladiator with an aluminum bed rack. I mounted a 3db ghost antenna to it with no ground and can hit a repeater 58 miles away. Quote
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