Slim Jim and J Pole calculator – M0UKD – Amateur Radio Blog
WEBThis 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.
SLIM JIM ANTENNA PROJECT - hamuniverse.com
WEBThe Slim Jim is a vertically polarized omnidirectional end-fed antenna having considerable "gain" and this is concentrated almost parallel to ground toward the horizon rather than skyward making it more efficient than a ground plane …
How To Build A DIY 2M Roll-Up Slim Jim Antenna (Including How …
WEBMar 1, 2022 · How To Build A DIY 2M Roll-Up Slim Jim Antenna (Including How To Crimp A PL-259 UHF Connector Onto RG8X Coaxial Cable): Step-By-Step Instructions
Dual band 2M / 70CM Slim Jim Antenna with 10' or 16' Cable.
WEBMany have tried to copy this antenna over the years but none compare to the Authentic N9TAX antenna. Features: Frequency range 144-148mhz / 440-450mhz Handles up to 100 Watts! Base Antenna performance. Sealed from the weather. Quality connectors.
WEBJ-Pole or Slim-Jim Antenna: A J-Pole or Slim-Jim antenna consists of a vertical ¼-wave element and a vertical ¾-wave element. With the way these two elements are fed with your coax, no horizontal radiator elements are needed. The radiation pattern of this antenna is also omnidirectional and perpendicular to the plane of the antenna.
WEBConstructing the Slim JIM. According to references, this antenna can be constructed from anything such as; twin lead 300 ohm TV antenna lead-in, copper and aluminum tubing and solid copper wire. I opted for the first for my experiments and finally choose the solid copper wire for the final construction project.
WEBantenna which covers the VHF (2 meter), 220 MHz, and 70cm amateur band. Matching is excellent on all three bands and can be tuned independently. This antenna meets the demands set by ARES/RACES group for ruggedness, easy deployment, and performance. It requires no radials, is totally weather protected, and only 5 ½ feet tall. References 1. E.
WEBantenna which covers the VHF (2 meter), 220 MHz, and 70cm amateur band. Matching is excellent on all three bands and can be tuned independently. This antenna meets the demands set by ARES/RACES group for ruggedness, easy deployment, and performance. It requires no radials, is totally weather protected, and only 5 ½ feet tall. References 1. E.
2 Meter Slim Jim Antenna - KB9VBR Antennas
WEBThe Slim is an end-fed folded dipole antenna that has a gain of 6 dbi and a nice low RF take off angle. This makes the 2 Meter Slim Jim antenna a great solution for repeater sites, data and packet stations, APRS, and even every day communications.
J POLE ANTENNA DESIGN CALCULATOR by K4ABT - hamuniverse.com
WEBDesign your J Pole for hf, 2 meters, 220, 440 and up! J-Pole Antenna Design. SAVE TIME BY USING THE CALCULATOR BELOW. NOTE: Coax center conductor attaches to the. "Long section" feed point. Shield attaches to the short section feed point. Enter The Operating Frequency.