Ham Radio Antenna

VHF/UHF Slim Jim J-Pole Dual Band MURS / GMRS Antenna jpole Survival kit

VHF/UHF Slim Jim J-Pole Dual Band MURS / GMRS Antenna jpole Survival kit

VHF/UHF Slim Jim J-Pole Dual Band MURS / GMRS Antenna jpole Survival kit

Dual Band Slim Jim J-Pole More gain than a standard J-pole! Here we have a dual band Slim Jim that still has that great Slim Jim gain but allows operation on the GMRS band also. The secret is in the coax stubs that act as traps at high frequencies and shorten the electrical length of the antenna.

Length - 6 Feet tip to connector. 1.5:1 Bandwidth > 4mhz.

Gain - Approx 6dbi MURS 5dbi GMRS. Connector - so-239 / N-Female.

Construction - 450 ohm ladder line with short Coax stub. You can see from the illustration that the half wave radiator folds back on itself.

This essentially creates an end fed dipole yet still retains the j match system. The traps isolate the bottom of the antenna at high frequencies to allow dual band use. The lower half of the antenna becomes a GMRS j-pole. At MURS frequencies the wave doesn't see the traps and acts as a regular Slim Jim antenna. This antenna can be supported by many things including trees, ceilings, curtain rods and pretty much anything else you can dream up that will support 6oz of weight and keep the antenna a couple inches away from solid objects.

These antennas are great for E-COM activities, field expeditions, hotel rooms and base station use too. I use one as a base antenna myself as it performs better than my 1/2 wave vertical. If there is no note the default connector is the female UHF. The matching section is soldered then sealed with double wall adhesive type Heatshrink to protect it from the weather. The antennas are set up for optimal resonance on the frequencies 151.820 - 154.600 and 462.575 and 467.725 The SWR is less than 1.5:1 in these ranges when mounted in free space and not touching any solid objects.

I use Amphenol N connectors they cost more than double my normal connectors. Please request an invoice if you require an N so I can adjust the price.

Item pictured is not actual antenna but all are built the same. Most of the cabling on this antenna is made in the USA. See the reviews at E-Ham and Hamuniverse! The item "VHF/UHF Slim Jim J-Pole Dual Band MURS / GMRS Antenna jpole Survival kit" is in sale since Saturday, June 30, 2012.

This item is in the category "Consumer Electronics\Radio Communication\Antennas\Ham, Amateur Radio Antennas". The seller is "n9tax" and is located in Hebron, Indiana.

This item can be shipped worldwide.

  • Brand: Custom
  • Frequency Band(s): MURS
  • Directivity: Omni-Directional


VHF/UHF Slim Jim J-Pole Dual Band MURS / GMRS Antenna jpole Survival kit