Does a Retevis MR300 gmrs antenna need ground plane
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Retevis MR300 gmrs antenna
- Thread starter wpwx694
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Kiwibru
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As shown here: MR300,High gain GMRS mobile antenna.
My conclusion is that it is like many other Off-road type antennas that use the vehicle as the ground plane. Higher up being better than a front or rear bumper mount which will not produce a balanced signal envelope.
My conclusion is that it is like many other Off-road type antennas that use the vehicle as the ground plane. Higher up being better than a front or rear bumper mount which will not produce a balanced signal envelope.
mmckenna
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Those types of antennas are usually a dipole inside the radome and don't require a ground plane.
prcguy
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Looks like the same lineup offered by Midland. They should not need a ground plane. And the gain numbers are a lie, you can't get 6.6dB gain out of a 47" tall antenna at 460MHz. The actual antenna is more like 40" tall if you leave out the spring and mount.
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mmckenna
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GME has joined the GMRS game here in the USA with some of their Australian UHF CB radios reflashed for GMRS. They also sell similar antennas:
Thanks everyone
K6GBW
Member
The Aussies need to figure out that Americans require a jigawatt of power or it won't sell. Still, I love the remote mount idea. Sure wish we'd see more radios of that design here in 'Merica. I can't fit anything in my Subaru!
prcguy
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Sure you can, APX8500 with 03 hand held remote head. Only problem is you would have to sell the Subaru to pay for the APX.
mmckenna
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That's going to keep them from selling here. Too many fall into the "I need more wattzzzz" CB mentality. I watched a few of their videos and they mention the importance of antenna gain over RF power. But I doubt they'll win any of the consumers who will want the negative dB gain ghost antennas.
GME has been at a few trade shows, and they looked like they had some nice public safety oriented products. Some remote mount P25 gear that looked good.
K6GBW
Member
Well, that's kinda what I'm doing. I have an APX7500 with an 03 control head now. Problem for me is I spend more time on DMR than P25!
