Antena J Pole Uhf

Jan 15 2019 explore jafitek s board j pole antenna on pinterest.

Antena j pole uhf. Model sederhana tidak ribet tetapi memiliki pancaran rf yang bagus tidak kalah dengan antena antena vertikal lain yang sudah banyak dikenal. See more ideas about antenna ham radio antenna ham radio. Rated 4 86 out of 5 41 00 45 00. The j pole is an excellent solution for me and it will get me on the air from 80m to 10m rather than just 40m.

The design is based on an article which originally appeared in cq magazine 1987 and a version of this design is produced by arrow antennas of the usa not. 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. It is likely that any real world tests that show the slim jim to have better low angle. Almost 8mhz of 2 1 bandwidth double that of the j pole antenna more rf energy aimed at the horizon.

Being a half wave antenna it provides a small gain over a. Antena super j pole bisa untuk dual band vhf dan uhf. With a take off angle of about 7 degrees for the slim jim compared to 20 degrees for the j pole compact size. John huggins kx40 covers this question on this page.

Antena ini sudah banyak dikenal dan sangat populer di kalangan breaker negara paman sam amerika. 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. Compared to a standard j pole the slim jim has about 6dbi of gain wider bandwidth. Categories antennas tags inductance j pole simulation stub uhf vhf.

There are many rumours on the internet claiming that the slim jim has better performance than the j pole. Rated 4 93 out of 5 36 00 40 00. The j pole antenna s long and storied design history is due for one more chapter to mitigate the longstanding mast current and reliability issues. The uhf amateur radio and land mobile slim jim is only 19 inches tall.

For 2 meters the coil is 4 turns of coax at 5 inches in diameter. 2 meter amateur radio j pole antenna. On most of the j pole designs out there a choke should be used as close to the feedpoint of the antenna as possible to help prevent rf on the feedline and creating difficulty with swr readings. Simulation and common sense suggests that they are practically identical.

Vhf uhf antennas for amateur radio public safety business scanning and broadcast. 2 meter break a way j pole antenna. Snap on ferrite beads 11mm set of 3 rated 5 00 out of 5 9 00.