Homemade j pole scanner antenna, Assembly On one end of the 3⁄4” EMT pole, measure down 56. The j-pole antenna will yield slightly less than 3 DB of gain omnidirectionally. NET. Homemade 2M/440 J-Pole for $35 2m/70cm Dual Band J-Pole by KK4ICE If you have any questions about this project, contact KK4ICE@ARRL. of the pole. Jan 10, 2011 · Hello Everyone! I'm looking at putting up a base antenna for my Pro-197 digital scanner. I don't have a whole lot of space, so the smaller the better. Scanner Antenna: This is a simple but sensitive Home Made J-Pole Antenna that works great when You are limited as to a place to mount an external antenna !What You Will need: 1 ( 48 1/4 " twin lead wire2 ( Measuring tape3 ( Exacto knife or similar cutting tool4 ( electr… The j-pole antenna is basically an end fed half wave dipole that uses a 1/4 wave shorted matching stub as an impedance transformer. 5:1 across the whole range For small adjustments, tap the bracket up and down on the EMT with a screwdriver handle If the SWR is high, open the range to 120 MHz to 160 MHz and see where the dip is. Sweep the antenna from 144 MHz to 148MHz – the SWR should be under 1. ) This is an excellent performing J-Pole type antenna, constructed from readily available Aug 7, 2015 · The J Pole antenna is a popular antenna design among amateur radio operators because it is effective and easy to build. Jul 24, 2021 · Greetings!!! Anyone make their own antennas for the field or for home? I cut an old homemade dipole down to 470mhz and am using it as a scanner/gmrs antenna in my shop (stapled to the outside of my shop) right now but am gathering materials to make a copper pipe/pvc vertical dipole that I can rai. 5” and mark a line with an ink marker. Using the 2 (or 3) stainless-steel hose clamps, line up the top surface of the bracket assembly with the ink line you previously marked, and tighten the clamps. If it’s below 144 MHz, the rod can be trimmed shorter. Many scanner aficionados prefer the discone antenna, but the J-Pole has some distinct advantages over discones for scanner monitoring. It’s basically an end-fed omnidirectional half-wave antenna, matched to the feedline by a quarter wave transmission line stub. Mount the antenna in the location of your choice using the lower 5 ft. Are these "copper pipe" J pole Scanner Antenna: This is a simple but sensitive Home Made J-Pole Antenna that works great when You are limited as to a place to mount an external antenna !What You Will need: 1 ( 48 1/4 " twin lead wire2 ( Measuring tape3 ( Exacto knife or similar cutting tool4 ( electr… Jan 17, 2011 · The J-Pole antenna is an excellent choice for a low cost scanner antenna that is capable of picking up signals from a wide range of frequencies. Jul 1, 2008 · Anyone know of any good plans for a homebrew scanner base antenna? I'm mostly interested in 100-200mhz and 400-500mhz. The material I chose to build the j-pole antenna was 3/4 inch copper pipe used for plumbing. (Step-by-step instructions with photos can be seen below, following the project description and safety disclaimer. How to Build a DIY 2 Meter J-pole Antenna If you are looking for an inexpensive, and easy to construct antenna, the J-pole antenna is a great one! In about an hours time, and about $15 worth of materials, you can have a great performing omnidirectional j-pole antenna. I already have a Diamond D-130J discone antenna, but since the majority of the listening in my area is now digital in the 850MHz area, a dedicated antenna might be better.
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