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J-pole antenna - Wikipedia The J-pole antenna, more properly known as the J antenna, [1] is a vertical omnidirectional transmitting antenna used in the shortwave frequency bands It was invented by Hans Beggerow in 1909 for use in Zeppelin airships [2]
KB9VBR J-Pole Antennas - KB9VBR Antennas Reliable and affordable VHF UHF Antennas for Amateur Radio‚ Public Safety‚ Business‚ Scanning‚ NOAA Weather, and FM Broadcast
J POLE ANTENNA DESIGN CALCULATOR by K4ABT - hamuniverse. com 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
J-Pole Antenna Calculator Have fun designing your own J-pole antenna for any band with our J-pole antenna calculator It allows you to build a J-pole antenna for the chosen frequency band
Slim Jim and J Pole calculator – M0UKD – Amateur Radio Blog This calculator can be used to design a Slim Jim or a J Pole antenna The Slim Jim, designed by the late Fred Judd, G2BCX, can be a great portable 'roll up' antenna, if made out of 300Ω or 450Ω ladder line twin feeder
A New Take on the “Simple” 2m 70cm Dual Band J-Pole - W8WKY Why This Again? Many people, including me, have passed around plans for a “simple J-Pole” As I was giving out a link to one for the Ohio VHF+ Simplex Contest I wondered how easy it really was to build since I’d never actually done it Every plan I looked at had one of two deficiencies:
INTRODUCTION TO THE J POLE ANTENNA - ka3pmw. com The transformer is a 1⁄4 wave length matching stub, located at the bottom of the 1⁄2 wave length section, and becomes part of the antenna, forming the “J” shape