Slim Jim Antenna Calculator

Slim Jim Antenna Calculator by M0NWK - Easy to use online Slim Jim antenna calculator. The development of the Slim JIM Antenna.

Ham Radio Shortwave Radio Ham Radio Antenna

J-Pole ¾ λλλλ F Balanced Feed Point Slim JIM ¾ λλλλ ½ λλλ ¼ λλλλ F F Added parallel element Capacitance gap ½ λλλλ ¼ λλλλ F F DU1ANV Fig.

Slim jim antenna calculator. 2m Slim Jim Antenna for SOTA 4 Jun 2013 2m Slim Jim portable antenna for SOTA activations The 2m band offers a range of voice and digital transmission modes suitable for SOTA activations. Note the added parallel element beside the main radiator. Calculate the required dimensions for a Slim Jim antenna construction for any given frequency.

The dimensions are crucial and here Id highly recommend M0UKDs Slim Jim Calculator. I used this calculator for my 220MHz J pole and got decent results a 151 SWR ratio and that antenna works just fine. After researching and looking at antenna models I do not agree.

The main category is Antenna design calculators that is about Antenna design calculators. I have been using this one indoors my hobby room and outoors in my shop. See below the Slim-Jim antenna design.

Input your frequency to automatically calculate the lengths of the different antenna parts. This antenna design does not need a ground plane and is ideal for mounting inside PVC piping to protect it from the elements. Find this Pin and more on Hamradio by Jorge López.

I purchased an N9TAX dual band slim jim antenna for MursGMRSFRS used from a guy. Slim Jim Antenna dimension calculator Back to Antenna calculator overview. Is the frequency and the length of the antenna The choke balun consists of around 9 close turns of the coaxial cable around a 40mm former pvc pipe etc or taped up and hung freely.

Do not install ANY antenna over. Speed of light is used to determine the speed at which radio waves. Ppg Near Me Window Tinting Near Me Diy Car Wash Near Me Restaurants With Live Music Near Me Auto Body Repair Shops Near Me Mirror Stores Near Me Craigslist Rochester Ny Pets Bath Showrooms Near Me Nail Supplies Near Me Fruit Stands Near Me Subway Near Me Now Herbal Shops Near Me Polish Deli Near Me How.

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. Saved by Everythings Experimental. My personal preference is SSB 144200 MHz however.

The formula for calculating wavelength in metric system is 300 freq MHz Using the formula from the figure we have. Slim Jim J Pole antenna calculator. Enter the required frequency in MHz and the antenna designer will calculate the dimensions of the elements as shown below.

This link is listed in our web site directory since Saturday Mar 5 2011 and till today Slim Jim antenna calculator has been followed for a total of 8673 times. Wavelength x copper wire velocity factor 2055 cm x 094. Input your frequency to automatically calculate the lengths of the different antenna parts.

Diy Tv Antenna Ham Radio Antenna Electronic Circuit Projects Electronics Projects Arduino Projects Radios Radio Amateur Dipole Antenna Communication Methods. I used the M0UKD online antenna calculator to get my dimensions. Wavelength 2055 cm.

This is an Imperial version of the calculator. The conductive material user for the antennas radiating element will affect how well RF propagates through it and certain materials can slow the RF. Slim Jim and J-Pole calculator by John M3UKD.

The J Pole antenna is a simplified version of the Slim Jim antenna using the same matching stub principle. The Slim Jim can be a great portable roll up antenna if made out of 300Ω or 450Ω ladder line twin feeder. It can be built for almost any frequency.

Input the frequency for calculations Velocity factor. A slim jim is an easy to make. Frequency MHz Velocity Factor see text vf Actual wavelength inches Wavelength considering velocity factor inches A.

2m Portable Slim Jim Antenna. I need another coax pigtail to test SWR with my new antennas so I have not actually yet done any kind of formal electronic testing. This calculator can also be used to make the J-Pole.

The length of the antenna is three quarter wavelength. SAVE TIME BY USING THE CALCULATOR BELOW. Add a loop of string to the top and hang it on a tree branch use it with your handheld transceiver then roll it up and put it in your pocket when done.

This calculator can be used to design a Slim Jim or a J Pole antenna. Slim Jim J Pole Antenna Calculator. I bought it because I had tried making them and I am having a hard time getting them to resonate with the online calculators.

Gallery of Dipole Antenna Calculator. It radiates and receives in an omni-directional pattern. This page shows you how to make a simple but effective Slim Jim antenna.

145500MHz and the calculator gives you all of the values you need. Calculate the dimensions for a Slim Jim or J Pole antenna for HF VHF or UHF - Including velocity factor. Coax center conductor attaches to the.

See the main page for more information. Building the Slim Jim antenna. One benefit most agree on is that the Slim Jim has more bandwidth or a larger range of frequency with a usable SWR level.

300146 2055 M. The Slim Jim Antenna The 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 type antenna by about 50 percent better. So far received 73 votes for a total.

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. It includes below a calculator to work out all the mesurements for the frequency you require. You put in the frequency youre after eg.

Convert a J Pole to a Slim Jim More Antenna Projects. Signal wave shape of a J-pole A and the Slim JIM B. Many claim the Slim Jim Antenna has quite a bit more gain than the J-pole.

Slim Jim and J-Pole calculator M0UKD Amateur Radio Station Information Page. What we must understand before making Slim Jim antenna is the calculation formula and relationship between antenna length and frequency. The Slim Jim Antenna is a relative of the J-pole Antenna.

Overall length inches J. This guide assume you want to build a slim jim antenna that centered on 146MHz. Just ignore B and E and.

A Slim Jim for 2m 145MHz.

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