Posts

Showing posts from November, 2021

3 Easy Multi-Band HF Antennas You Can Build

Image
In this video from Callum McCormick (M0MCX), we learn how to add multi-band capability to basic loop, vertical, and dipole antennas. If you can't see the video, please insert this title URL into your browser search box: https://www.youtube.com/watch?v=SGctGaY0Cbk This is post 2825 in a continuing series of simple ham radio antennas. Here are some comments from Callum: Loops, Verticals and Dipoles for Ham Radio. Let's build them - then discuss how to multi-band them. Callum. #dxcommander #hfAntennas #hamradio ----- Thanks for joining us today. Aloha es 73 de Russ (KH6JRM).  

An unusual JPole Antenna

Image
Thanks to Dave Casler (KE0OG) for this interesting J Pole Antenna.  The original design comes from Jerry Bustin (KR7KZ), who made these antennas in the 1970s. If you can't see the video, please insert this title URL into your browser search box: https://www.youtube.com/watch?v=Pp3PsWz_vII This is post 2824 in a continuing series of simple ham radio antennas. Here are a few comments from Dave: Here's an unusual Jpole antenna sent me by Jerry Bustin, KR7KZ. He first made these in the 1970s while stationed in Okinawa. Interesting feed arrangement. To get the pdf drawing, go here: https://dcasler.com/wp-content/upload... Subscribe: https://youtube.com/user/davecasler . Ask Dave Playlist: https://goo.gl/inaQeB . Tip Jar: http://ke0og.net/tip-jar To learn more about me, visit: http://www.dcasler.com/about/ Tip jar (on my website): http://www.dcasler.com/tip-jar/ (provides a method to use your credit card via PayPal, Also describes Patreon) To pose an Ask Dave question: http://w

Stealth HOA Antenna

Image
  Here's another fascinating HF antenna for those living in deed-restricted apartments and homes.  Although the antenna from TN07 Engineering is a bit expensive, it could be what you need to stay on the air. If you can't see the video, please insert this title URL into your browser search box: https://www.youtube.com/watch?v=vHcxmSdvfqA This is post 2823 in a continuing series of simple ham radio antennas. Here are some comments from the video: Another way to beat the HOA commandos when you want to operate ham radio. This antenna can be very hard to notice at all if you set it up in a stealthy way. 80-6 meters, SWR less than 2:1 across 80-6m, and handles 100 watts. Links are below SUBSCRIBE https://tn07.com/ www.hamradioconcepts.com (Join the newsletter) www.facebook.com/hamradioconcepts www.patreon.com/hamradioconcepts Interested in obtaining your ham radio license? The best way to get started is at https://hamradioprep.com/ Use the code eric20 at checkout to save 20%.

Using a Below Ground Level Antenna

Image
  Here's an interesting idea for portable operations--using an antenna below ground level.  In this video, "Outdoors On The Air" shows us how a nearby body of water can enhance HF signals. If you can see the video, please insert this title URL into your browser search box: https://www.youtube.com/watch?v=u2SKuQMzCu8 This is post 2822 in a continuing series of simple ham radio antennas. Here are a few observations from "Outdoors On The Air": We all know that deploying a ham radio antenna as high above ground as possible is the best choice, but would deploying an antenna below the surrounding terrain work at all? Join me as I put this idea to the test. N9SAB antenna store: https://www.ebay.com/str/n9sab ----- Thanks for joining us today. Aloha es 73 de Russ (KH6JRM).

The random length end fed HF antenna and you

Image
Thanks to Bret of the "SurvivalComms" youtube channel for this simple, easily deployable HF antenna.  You may have most of the materials at your home station, thus reducing the cost of this project. As with most random length antennas, you'll need an antenna transmatch (i.e. "tuner") and a good counterpoise/ground system to get maximum efficiency from this antenna. If you can't see the video, please insert this title URL into your browser search box: https://www.youtube.com/watch?v=a0hCtmbD5as This is post 2821 in a continuing series of simple ham radio antennas. Here are some comments from Bret: Short video on a simple multiband HF antenna (w/tuner) you can put on the air with a few mulitpurpose items in less time than it takes to watch this video. ----- Thanks for joining us today. Aloha es 73 de Russ (KH6JRM).  

Loop Antenna for 40 meters to 10 meters

Image
If you need a "super multi-band antenna", then this "Lazy-Loop" from Tim (G5TM) and Rick (DJ0IP) may be for you.  The time spent in designing, building, and testing this loop antenna is well-worth the effort. If you can't see the video, please insert this title URL into your browser search box: https://www.youtube.com/watch?v=6ycBtbIKOqI This is post 2820 in a continuous series of simple ham radio antennas. Here are a few comments from Tim (G5TM). Thanks again to Rick, DJ0IP for publishing details of this antenna which he says provides great gain at higher angles for 80 and 40 metres as well as very good gain 20 metres through 10 metres. Let’s use MMANA-gal modelling to see if this agrees. Check out Rick’s website here: https://www.dj0ip.de/my-favorite-ante... Connect with my channel by subscribing and commenting ----- Thanks for joining us today. Aloha es 73 de Russ (KH6JRM).  

Ham Radio Portable Antennas

Image
Thanks to Kyle (AA0Z) for these interesting antennas suitable for both portable and home use. The video features a good discussion about Windom, End-Fed Half-Wave, and Random Length Wire Antennas. If you can't see the video, please insert this title URL into your browsers search box: https://www.youtube.com/watch?v=qNQArO3uj-U Here are some comments from Kyle: In this episode I review the antennas that I use when working expedition style and also what I use when running portable for POTA and SOTA activations. RadioWavz Windom - https://www.radiowavz.com/product/dx-... Random Wire Website - http://www.hamuniverse.com/randomwire... Adam K6ARK End Fed Antenna - https://youtu.be/kSQzUETRMlk EARCHI End Fed - http://www.earchi.org/proj_homebrew.html Big Shot Amazon Affiliate Link - https://amzn.to/34LZUVr Throw Line Affiliate Link - https://amzn.to/2HUcb0O Throw Bag Affiliate Link - https://amzn.to/3oJqPsR ----- Thanks for joining us today. Aloha es 73 de Russ (KH6JRM).  

Antenna Length Chart in Feet and Meters

Antenna Length Chart For Radio Amateurs (Hams). Views expressed in this post are those of the reporters and correspondents. Accessed on 23 November 2021, 1335 UTC. Content supplied by W7LK via qsl.net. Source:  https://www.qsl.net/w/w7lk/site/antennachart.htm Please scroll down to view the antenna length chart. Thanks for joining us today. Russ Roberts (KH6JRM). https://www.simplehamradioantennas.com. Antenna Length Chart in Feet and Meters Antenna Length Chart in Feet and Meters   Ham Band Frequency (Mhz) 1/4 λ (Feet) 1/2 λ Dipole (Feet ) 1 λ Loop (Feet)   1/4 λ (Meters) 1/2 λ Dipole (Meters) 1 λ Loop (Meters)   160 1.800 130' 0'' 260' 0'' 558' 4''   39.6 79.3 170.2 1.850 126' 6'' 253' 0'' 543' 3'' 38.6 77.1 165.6 1.900 123' 2'' 246' 4'' 528' 11'' 37.5 75.1 161.2 2.000 117' 0'' 234' 0'' 502' 6'' 35.7 71.3 153.2   80 3.500 66' 10''

A Balloon Based Repeater For Emergency Applications

Image
Thanks to Evan Markowitz (KD2IZW) for this innovative approach to launching a balloon-based antenna for portable or emergency operations. If you can't see the video, please insert this title URL into your browser search box: https://www.youtube.com/watch?v=G4eaChIjk8E This is post 2817 in a continuing series of simple ham radio antennas. Here's a description of the project from Evan himself: Evan Markowitz, KD2IZW, presents at the 2017 Dayton Youth Forum, a solution for facilitating communication in emergency situations where line of site communication is not viable. Thanks to Carole Perry, WB2MGP, for hosting the Youth Forum at the Dayton Hamvention. License Creative Commons Attribution license (reuse allowed) ----- Thanks for joining us today. Aloha es 73 de Russ (KH6JRM).  

160 meter vertical antenna slideshow

Image
If you have the space and energy to build and erect a 160 meter vertical antenna, then this video is for you. Even if you can't imagine such an antenna, this slideshow from WE6Z is worth watching. If you can't see the video, please insert this title URL into your browser search box: https://www.youtube.com/watch?v=C7U_-CTrfQU This is post 2816 in a continuing series of simple ham radio antennas. Here are some comments from WE6Z along with some interesting links: Here are a bunch of build pictures of my 160 meter vertical antenna project. Completed in 2019. Here it is completed: https://www.youtube.com/watch?v=Yn_Bf... ----- Thanks for joining us today. Aloha es 73 de Russ (KH6JRM).  

How to make an Amateur Radio stealth wire antenna support

Image
Thanks to Callum McCormick (M0MCX) for this easy way to get height for your stealth wire antennas. The secret is to buy a few "aluminum scaffold poles" for antenna support. If you can't view the video, please insert this title URL into your browser search box: https://www.youtube.com/watch?v=4KQEQJ5qeuw This is post 2815 in a continuing series of simple ham radio antennas. Here are some comments from Callum: Great tip for getting stealthy height for your wire antennas. Particularly useful for folks who don't have trees strategically placed. Aluminium Scaffold Tubes slip inside Sail Board / Wind Surf Masts. Then you can paint to suit. Cheap, economical and structurally sound. Background: My name is Callum, callsign M0MCX. The whole DX Commander brand was a bit of an "accident" since I already have 2 day-jobs (I own a couple of tech companies). Everything I make, I use myself. My products are the answer to *my* problems so I made stuff that worked for me. I

Best Ham Radio Antenna For Small Spaces

Image
If you have limited space for HF antennas, then this tutorial from "TheSmokinApe" you tube channel is for you. The antenna featured in this video is the "Shorty Forty", an End-Fed Halfwave (EFHW) that is simple to build and delivers good performance. If you can't see the video, please insert this title URL into your browser search box: https://www.youtube.com/watch?v=v6U8jBEtWs0 This post 2814 in a continuing series of simple ham radio antennas. Here are some comment from the author: In this video, I show a Ham Radio Antenna that I built for small spaces. The antenna is referred to as a "Shorty Forty" which is a shortened End Fed Half Wave Antenna for 40 Meters (EFHW). Please consider supporting TheSmokinApe Channel on Patreon Here: https://www.patreon.com/TheSmokinApe Here is the video where I built the Induction Coil: https://youtu.be/6WXp29yxCEM Check out my Ham Radio for Beginners Playlist: https://youtube.com/playlist?list=PLm... Check ou