Diy gmrs colinear antenna
WebSep 9, 2013 · Antenna 1 Priorities are: low cost, ease of build, low swr. Antenna 2 Priorities are low swr, durability, max range in one direction. Antenna 3 This antenna … WebJul 15, 2024 · A coaxial Collinear antenna for 2m and 70cm mostly made from junk bits and pieces for less than £1 Oxford Shortwave Log 7.43K subscribers Subscribe 86 7.9K views 2 years ago Hi …
Diy gmrs colinear antenna
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WebAug 27, 2024 · Didn’t take much to trim one down using the antenna analyzer. Also doing some simulations it looks like a 1/4 wave could be made to cover the Ham 2M band and the MURS channels. The same with the Ham 70cm band and GMRS. The later I built using a cheap BNC circuit board socket and stiff bus wire. WebA dipole for the GMRS frequencies would only be ~35cm long. You'd be better off with a J-Pole or a ground plane at home. paazig • 5 yr. ago. There's a good Android app called …
WebSep 28, 2013 · Colinear with good performance almost for free Here is the performance graph of my almost costless colinear 10 element antenna made from RG59 cable ends.The cable setting is occupied in a leftover 3/4 inch PVC water pipe and my device is a RTL 1090 DVB-T dongle from China.The RG59 cable costs about 1 $.The two ends of the pipe are … WebUse the string to pull the antenna up inside the shell. There will be some resistance as the foam spaces pass the first opening. Work it. Then remove the string. You now need to secure the top of the antenna with the top …
WebDon Murray W9VE Building a Dual-Band Antenna Mentorfest 10/23/04 13 Steps to Success 1. Drill the bracket. 2. Measure and Saw the all-thread. 3. Mount antenna mount on … WebEnter the required frequency in MHz, the velocity factor of the coax (if known) and antenna designer will calculate the dimensions of the elements as shown below. Enter Frequency (MHz) Coax velocity factor Velocity Factor = FACT: RF …
WebNov 8, 2011 · Here is the Blueprint ( Download .PDF with the plastic parts detailed prints RIGHT CLICK -> SAVE AS) to make this antenna. The blue print contains just the basic step and directions assuming you know how to fabricate antennas or know your way around metal fabrication and/or machining.
http://clackamasares.org/wp/wp-content/uploads/2024/12/MENTORFEST_ANTENNA.pdf mouth swabs to moisten mouthWebDIY GMRS base / repeater antenna prototype ElfNet Designs 1.95K subscribers Subscribe 83 Share 6K views 5 years ago Ok so this is my first prototype build of a UHF GMRS … mouth swab test for life insuranceWebThe first collinear antenna is built from the 75 Ohm coaxial line and is balanced with the 75 Ohm resistor, the second collinear antenna is built from 50 Ohm coaxial line balanced with the 50 Ohm resistor. They are applied to themselves as close as possible with the mutual half element shift. mouth swab test marijuanaWebJul 9, 2016 · The Copper Cactus J pole antenna design is a simple amateur radio antenna model that will allow you to operate both bands with good performance, it is easy to make and the web offer several projects and examples we have collected here below for your reference. The Copper cactus antenna Copper Cactus multiband J-Pole antenna (by info) mouth swabs testWebNov 1, 2003 · Antennas. 5/4 Wave 2 Meter Antenna 70cm Collinear Antenna From Coax Home Brew A 4 To 1 Balun Copper pipe dipole antenna construction for 2 Meters … mouth swab test for marijuanaWebThe collinear J antenna improves the Super-J by separating the two radiating half-wave sections to optimize gain using a phasing coil. [29] The resulting gain is closer to the optimum 3 dB over a conventional J-pole or halfwave antenna. [29] The approximate gain in the H-plane of the Collinear J antenna is from 4.6 to 5.2 dBi (2.4 dBd to 3.1 dBd). heat changing mug microwaveWebNov 14, 2024 · I ran GMRS for a many years, as well as 70cm ham on the same radio. For my application, it was hard to beat a basic NMO mount 1/4 wave antenna. 1/4 wave antennas are very broad banded, and will easily cover 462-467MHz, and can often do it without having to pull out an SWR meter or antenna analyzer. mouth swab test weed