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Your cart is empty. Connector: UHF- Female TO UHF-Male (SO239 to PL259)
Length of antenna: 5.8'' X 3(VHF) and 4.6'' X 3(UHF)
Three Short Gain Rod (4.6'') is used for UHF band (400-480MHz)
Three Long Gain Rod (5.8'') is used for VHF band (136-174MHz)
Wide range of applications, can effectively enhance the signal of your mobile radio transceiver.
Package includes：
3* Short Gain Rod
3* Long Gain Rod
1* Connector
(Magnet base not included)
Brooklyn in Texas
Reviewed in the United States on January 6, 2025
If you need a ground plane for a portable radio situation, I love this product
Jared D
Reviewed in the United States on November 24, 2024
The ground plane kit made no improvement and there was a small shift in swr.
VJ KURVY
Reviewed in the United States on April 4, 2024
Thought it may replace one on my $500 comet antenna. SWR off the charts, took immediately down. Verified after the fact with LMR400/DUMMY LOAD/ SURECOM x 2
George Cullen
Reviewed in the United States on July 19, 2023
As others have written, the spines are very easily breakable.Its either copper or brass and paintef black.I removed the “scarey black Ar-15 color warpaint”LOL 🤪for the required grounding effect of the copper on copper.The whole gadget is small. As in desktop size. I setup with two connected.
C Chocholek
Reviewed in the United States on November 8, 2023
I purchased this kit to use on a service vehicle that has a fiberglass topper. The original antenna I was replacing performed well, but was only a 1/4 wave stubby that utilized a corroded 6" diameter aluminum disk as its ground plane. I upgraded to a 5/8 wave vertical and wanted to replace the corroded aluminum ground plane with something wouldn't require much time to do so. Unfortunately, this unit wasn't a good solution. After installing this ground plane kit and checking the antenna system with an analyzer, I realized that something was definitely wrong. High SWR readings were all I could see on my test equipment. After tinkering with the installation and having no luck lowering the SWR's, I removed the ground plane kit and replaced it with a stainless steel disk. The SWR reading dropped to 1:1.Out of curiosity, I tried the ground plane kit on another UHF system that has no issues, and the same high SWR problem had shown up once again.I'm a professional Electronics Technician that performs RF installations on a regular basis. I've tuned thousands of transmitter antennas throughout my 30 years in the field. I have a service van full of RF testing equipment and multiple antenna analyzers at my disposal. I wouldn't recommend using one of these on a high power UHF transmitter. If you plan on doing so, make sure you use an antenna analyzer or even a cheap SWR meter to verify your installation doesn't damage your equipment.
Customer
Reviewed in the United Kingdom on November 25, 2023
got this for my truck for better ground due to fibre glass cab , an to reduce rf feed back , work a treat highly recomended
Desert Lion
Reviewed in the United States on October 25, 2023
Screw this onto a SO259 antenna base, then screw the PL259 antenna onto this adapter. Select either VHF or UHF operation by attaching the longer or shorter counterpoise whips (respectively) into the threaded holes in the adapter. As the instructions mention, be gentle - the threads are small and soft. Make certain the whips are inserted straight and not cross-threaded, then carefully screw them in with fingertip pressure only. DO NOT FORCE and use no tools. Given that these are for stationary base use, they don't need to be very tight, simply secure enough to make reasonable electrical contact. For mobile use, for example on a motorcycle or plastic top with insufficient metal to provide a suitable ground plane, I would recommend using adhesive or cement after attaching the counterpoise whips to ensure they don't back out with vibration. It should be something removable, however - changing between VHF and UHF frequency ranges requires removing one set of whips and installing the other.Once installed, this does a good job of improving the ground plane of an antenna that does not include one as part of the basic design. That is typical of mobile antennas designed to be installed on a metal vehicle which use the metal surfaces at the ground plane. It's also easy to set up and take down for portable operation, setting up a temporary base operation in support of community service or an emergency. Disassemble, put the parts in a zipper bag, and keep it with the stand used to hold the antenna. You will be ready to support a temporary base operation at a moment's notice.
Sir Jay
Reviewed in the United States on December 25, 2022
Works very after you clean up the paint on the connections so they can make a good connection. Remember to not tighten the rides to tight at first and they wel snug up with out breaking as other have had problems with. Enjoy I sure am
DRL
Reviewed in Canada on August 22, 2021
While installing one of the ground plane rods broke off with very little effort... It came with three shorter rods but the threaded part is broke off in the hole so I can't use the shorter ground plane...
Bob Allen
Reviewed in Canada on November 24, 2021
Made a mag mount ground plane for VHF/UHF Amateur Radio use. Works great, highly recommended.
Pede O’ Biden
Reviewed in the United States on November 14, 2021
Not terribly effective, but well made
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