Antena J Pole Dual Band

Make the j out of 1 4 soft copper solder it in place thru the hole and add the cable.

Antena j pole dual band. Convert a j pole to a slim jim more antenna projects. If you have any questions about this project contact kk4ice arrl net. Osj dual band 155 460 mhz search rescue. This value is about 2 3 2 4 db higher than the average gain of a single radiator j pole.

I was so pleased with my results that i purchased enough materials to construct another j pole for portable use. The design is based on an article which originally appeared in cq magazine 1987 and a version of this design is produced by arrow. Step by step instructions with photos can be seen below following the project description and safety disclaimer this is an excellent performing j pole type antenna constructed from readily available materials. The dual band open stub j pole antenna built out of heavy duty 3 16 angle aluminum uhf so 239 connector with 3 8 aluminum elements and all stainless steel hardware.

Heavy duty super sturdy 5 8 coupling nut for added resilience. See more ideas about antenna ham radio antenna ham radio. Osj model osj 146 440 dual band j pole with extra labor charge for two piece element will also fit in the antenna bag if all the elements are removed from the bracket osj business band marine band murs 150 162 mhz. Indeed although many folks like to bandy the gain advantage of a collinear.

Matching to the feed line is achieved by sliding the connection of the feedline back and forth along the stub until an impedance match is obtained. If you need a super j use a piece of 3 4 pvc as the insulator and add the stub and another 38 or so inches of conduit. The copper cactus j pole antenna design is a simple amateur radio antenna model that will allow you to operate both bands with good performance it is easy to make and the web offer several projects and examples we. With a 50 foot length of rg8 and the antenna 20 feet in the air swr was a respectable 1 13 1 for the 147 780 mhz input frequency and 1 01 1 for the 449 650 mhz input frequency.

Being a half wave antenna it provides a small gain over a. A dual band vhf uhf j pole. Jan 15 2019 explore jafitek s board j pole antenna on pinterest. The j pole antenna is an end fed omnidirectional half wave antenna that is matched to the feedline by a quarter wave parallel transmission line stub of lecher system form.

This antenna provides continuous coverage of the 2 metre 144 148mhz and 70cm 430 450mhz bands and is an excellent choice for base station use. We already published in the 9 j pole antenna projects some samples of copper j pole antennas. Here a collection of links to make you own dual band vhf uhf copper cactus antenna. Scarc vhf uhf j pole antenna.