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Showing posts from 2020

2 element wire yagi for 28 MHz

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https://www.youtube.com/watch?v=8bS1QBH8VwQ&ab_channel=vk3ye
This is post 2361 in a continuing series of simple ham radio antennas.
Do you want to give your 10 meter signal a little boost and better directivity? Then, this 2 element wire yagi project from Australian radio amateur Peter Parker (VK3YE) is your answer.
The antenna is simple, uses locally available materials, and is cheap to build.  Here are some of Peter's comments:
A wire yagi is the simplest and cheapest way to build a gain antenna for the higher HF bands. This video is a description of one for 28 MHz. VE7CA article 1: http://www.arrl.org/files/file/Techno... VE7CA article 2: http://www.ve7ca.net/ANT/MYa/VE7CA%20... VE7CA website: http://www.ve7ca.net/index.php ----- Thanks for joining us today.
Aloha es 73 de Russ (KH6JRM).

MFJ-6120 Zepp and MFJ-6220 Collinear Review

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https://www.youtube.com/watch?v=nyTn4_2xwTk&ab_channel=DavidCasler
This is post 2360 in a continuing series of simple ham radio antennas.
An interesting, concise, and well-produced video from David Casler (KE0OG) about two popular MFJ HF Antennas:  The MGJ-6120 Zepp and the MFJ-6220 Collinear Antennas.  Both antennas require a bit of adjustment before maximum efficiency is attained. Both antennas also give a bit of gain (around 3 dBi).
Here are some of Dave's observations about these antennass:
These are both 20 meter single band wire antennas (also available for other bands). This video reviews the "how it works" followed by tests for each, and explains how I got the Zepp to work. I particularly like the collinear (and, yes, it's spelled with two L's), which performs significantly better than my station vertical.
----- Thanks for joining us today.
Aloha es 73 de Russ (KH6JRM).

Beverage Antennas: Field Installation Techniques

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https://www.youtube.com/watch?v=l91JL2ImEbk&ab_channel=ve6wz
This is post 2359 in a continuing series of simple ham radio antennas.
If you have the space, a "classic" Beverage Antenna will boost your received signals at a modest price.
In this well-paced video, Steve (VE6WZ) discusses the various field techniques used to design, build, and use beverage antennas.
Here are some of Steve's comments:
Various methods for construction and installation of a Beverage RX antenna in the field. Described are methods for wire layout, tree clearing, wire support and both feed-point and termination installation using tree supports. Also shown is how the relay boxes for multiple Beverages, and the broadside phasing boxes are deployed in the field.
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Thanks for joining us today.
Aloha es 73 de Russ (KH6JRM).

Cheap 40 m high-gain aerial...the half-square

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https://www.youtube.com/watch?v=a0i0EazI3O0&ab_channel=DXCommander
This is post 2358 in a continuing series of simple ham radio antennas.
If you want a simple, inexpensive 40 meter antenna with some gain (about 3 dBi), please try the "classic half-square antenna."
In this video, Callum (M0MCX) discusses the theory and construction practices of this antenna.
I've built several of these half-square "aerials" for both 20 and 40 meters, and they work very well broadside to the vertical array.
Callum does an excellent job of outlining the pros and cons of this easily-made antenna.  Here are few of his remarks:
I have not built a half-square yet - but this looks a cracking little antenna, particularly if you might have appropriately spaced trees in your back yard? 50 Ohms means no complex tuning, just coax to your antenna. Here's the Verticals I discussed: https://youtu.be/Qf…

You asked for it: A tour of the NK7J Antenna Farm

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This is post 2357 in a continuing series of simple ham radio antennas.
If you had enough space to erect the HF antenna of your choice, what would it be?  If you're NK7J, you would design, build, and use a 4-Square Antenna.
In this cleverly produced video, NK7J takes us through the entire antenna project.  Of course, such an antenna requires a bit of time and perhaps some additional help from your ham community.  But, the effort will be worth it!
Also included are several other antennas, including a mention of his 3 beverage antennas (great for receiving MF and HF signals).

Here are some general comments from NK7J:
Have had multiple requests to see the antennas here on the homestead. So here is a quick peak at them. The one thing I forgot was the 3 beverage antennas. www.facebook.com/hamhomestead Email: HamHomestead@outlook.c…

How I built a simple 160m top band transmitting antenna for L4.50 that actually works

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https://www.youtube.com/watch?v=LXCaHcGkAEM&ab_channel=OxfordShortwaveLog

This is post 2356 in a continuing series of simple ham radio antennas.
Thanks to Clint of "Oxford Shortwave Log" for this inspiring 160 meter transmitting antenna that doesn't require a lot of wire or real estate. Despite Clint's modest urban lot, this antenna works without causing major tuning adjustments or RFI problems.
If you're confined to limited space or must operate under deed-restricted circumstances, you may find a solution to these issues with Clint's antenna.
Here are some of Clint's remarks:
Hi there, this video demonstrates how it's possible to build a transmitting antenna for top band that doesn't involve 100's of metres of wire or significant height - and it actually works pretty well. Thanks for watching. Keep safe.
-----
Thanks for joining us today.
Aloha es 73 de Ru…

Ham Radio Station Grounding

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This is post 2355 in a continuing series of simple ham radio antennas.
Thanks to "Tinker John" (W5CYF) for this well-paced lesson on Ham Radio Station grounding.  John covers the basics of bonding, grounding, and lightning protection in a nice, comfortable manner.
Although John covers a lot of material in just a few minutes, you may want to check out the latest edition of the National Electrical Code (NEC) for further information.
Here are some of John's comments"
IMPORTANT: Effective and safe station grounding is a complex and often controversial subject. This video is not intended to be a how-to guide for safe and/or effective grounding. It is recommended that you seek qualified advice and instruction for your specific station and environment. ----- Thanks for joining us today.
Aloha es 73 de Russ (KH6JR…

Old TV rabbit ears as a junk box 2 meter antenna

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https://www.youtube.com/watch?v=XdZeY-KihH8&ab_channel=KevinLoughin
This is post 2354 in a continuing series of simple ham radio antennas.
When I "junked" an old TV receiver several years ago, I saved the attached "rabbit ears" antenna for possible future use.  I converted the old TV antenna into a simple, free 2 meter dipole antenna just as Kevin Loughin (KB9RLW) did in this video. 
All you need are a few basic tools and a little time to make this collapsable, portable antenna.  Make a few alterations and soon you'll have a nice antenna for both home and portable use.
Like Kevin, I'm a strong believer is adapting older technology to current ham radio use.  Have fun with this project!
Thanks for joining us today.
Aloha es 73 de Russ (KH6JRM).

PVC Tube Ham Radio Tower Project

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https://www.youtube.com/watch?v=GSDJzDYSW-s&ab_channel=drez20001
This is post 2353 in a continuing series of simple ham radio antennas.
If you need a temporary, inexpensive mast to support your HF/VHF/UHF antennas, then this video from "drez20001" may get you started on an enjoyable and educational weekend project.
PVC tubing is widely available and can be turned into an antenna support with a few basic tools.  "drez20001" does an excellent job of taking us through the steps needed to make a sturdy PVC mast.
Although PVC is useful for masts, it's susceptible to weather and wind damage.  You can guy the mast for more stability and coat the mast with paint for weather protection. ----- Thanks for joining us today.
Aloha es 73 de Russ (KH6JRM).

Build a portable 10 meter Yagi Antenna

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https://www.youtube.com/watch?v=cJ5aYxLzJyM&ab_channel=DaveTadlock
This  is post 2352 in a continuing series of simple ham radio antennas.
Thanks to Dave Tadlock (KG0ZZ) for this simple, 2-element 10 Meter Yagi-Uda Antenna for portable or home station use.  Dave takes us step-by-step through the design, construction, and testing phases of this project.
As Dave suggests,  this antenna would be a welcome addition to the annual ARRL Field Day communications exercise:
A simple 2 element 10 meter yagi antenna ready in time for Field Day weekend.
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Thanks for joining us today.
Until next time,
Russ (KH6JRM).

Field expedient VHF antenna made from TV coax

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https://www.youtube.com/watch?v=CwOATcwHrBo&ab_channel=SurvivalComms
This is post 2351 in a continuing series of simple ham radio antennas.
If you need an emergency VHF antenna, then this "quick, down and dirty" project using common RG-6 coaxial cable will get you on the air in just a few minutes.
In an emergency, RG-6 cable (75 ohm impedence) can be used to feed HF dipole antennas.  Use an antenna "tuner" to drop the SWR (1.5 to 1) a bit.
You can find RG-6 at electronics stores, home improvement centers, and neighborhood hardware stores.
Here are some general comments from the video's author:
The field expedient antenna series continues. A VHF antenna out of RG6 TV coax. duct tape, and sticks. Down and dirty tech to put in the know-how tool box for when all else fails. ----- Thanks for joining us today.
Aloha es 73 de Russ (KH6JRM).

Water's Edge Portable DX: A half-square antenna

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https://www.youtube.com/watch?v=a8Zh1_Mntz0&ab_channel=vk3ye
This is post 2350 in a continuing series of simple ham radio antennas.
Combine a beautiful seaside location with the simplicity of a half-square antenna and you get an effective, inexpensive DX antenna suitable for portable or emergency operations.  With a little creativity, you can erect a half-square hf antenna at your home station for improved results over a basic dipole.
Australian radio amateur Peter Parker (VK3YE) does a superb job of explaining the theory behind the half-square antenna, how to make the antenna, and how to use it in the field.  An excellent introduction for a truly outstanding antenna.
Here are a few of Peter's comments:
Testing a half square antenna on 14 MHz. Comprising a wavelength of wire bent into a wide inverted U, the half square over a good ground can radiate a low angle signal suitable for long dist…

Using a manual antenna tuner: Ask Dave episode 5

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https://www.youtube.com/watch?v=RRkbdTadmUU&ab_channel=DavidCasler
This is post 2349 in a continuing series of simple ham radio antennas.
Antenna "tuners" are a fact of life for most radio amateurs.  These impedance matching transformers enable us to use compromise antennas to their fullest ability while keeping dangerous SWR levels away from out sensitive transmitting gear.
In this well-paced video, David Casler reviews the pros and cons of manually antenna tuners, discusses the theory behind these devices, and shows us how to properly operate these ATUs (antenna tuning units).
Here are some general comments from Dave:
Manual antenna tuners are less expensive than the automatic ones, and are perfectly okay for your station. This video shows how to tune a manual antenna tuner, both with an external SWR meter and with the SWR meter built into your transceiver.
----- Thanks for joining us t…

Building a spiral loop antenna for 20 meters

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https://www.youtube.com/watch?v=ji19-6LPog0&ab_channel=KevinLoughin
This is post 2348 in a continuing series of simple ham radio antennas.
If you live in deed-restricted housing (HOA/CC&Rs) or like to experiment with small antennas, then this "spiral loop antenna" from Kevin Loughin (KB9RLW) may be the "stealth" antenna you're looking for.
Kevin has adapted designs from Harry (SM0VPO) and Frank (N4SPP) for this project.  Here are some general comments from Kevin:
NOTE: SM0VPO is not Richard. He’s Harry Lythall. My apologies to Harry. I've wanted to try out a spiral loop for awhile. I loosely followed Frank, N4SPP's notes on his page linked below. Pretty easy to throw together, broader bandwidth than a traditional magnetic loop. https://www.nonstopsystems.com/radio/... If you like my videos, please subscribe here: http://www.youtube.com/user/loughkb?s... I…

Build a Dipole Antenna Center Insulator

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https://www.youtube.com/watch?v=fY8XaxamIYU&ab_channel=KB9VBRAntennas
Thanks to Michael Martens (Kb9VBR) for this excellent tutorial on making a strong, weather-resistant center insulator for HF dipole antennas.
If you follow Michael's step-by-step assembly process, you'll have a sturdy support for your HF dipole antenna at a fraction of the cost of a commercially made product.
Here are some of Michael's observations: The dipole is a common antenna for the amateur radio operator; and with good reason- dipoles are easy to build and are proven performers. Recently I wanted to build a dipole but didn't have a center insulator. Instead of paying $25-45 and waiting days for delivery‚ I decided to build my own for about $12 using common parts (with the exception of the SO-239) and tools available at your local home improvement store. Parts List: 1 - ¾ x ¾ x 1 inch PVC Tee connector 2 -…

Ground Spike Antenna using the Earth to receive VLF signals

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This is post 2346 in a continuing series of simple ham radio antennas.
In this video, Kevin Loughin (KB9RLW) show us how to make an ultra-simple antenna to receive VLF signals.  Now that radio amateurs can use the 630 and 2200 meter VLF bands, this short explanation of the "Ground Spike Antenna" may be helpful in peaking your interest in the world beneath the medium wave AM Broadcast Band.
Here are some of Kevin's comments:
I've wanted to try this for a long time. Using the earth as an antenna! If you like my videos, please subscribe here: http://www.youtube.com/user/loughkb?s... If you want me to keep making more videos like this, consider becoming my patron at Patreon: http://www.patreon.com/kb9rlw/ Discuss this and other videos on Facebook: https://www.facebook.com/kb9rlw/ Hit me up on the echolink repeater down by my house: W9TE (No…

Wolf River Coils Ham Radio Antennas

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https://www.youtube.com/watch?v=00oTBh9fq5A

This is post 2345 in a continuing series of simple ham radio antennas.

Thanks to Mike (K8MRD) for this excellent introduction about Wolf River Coils and the antennas you can make from them.  Mike does a comprehensive review of these coils and suggests several way to use them for antenna projects.

Here are some of Mike's comments:

In this video we take a look at the Silver Bullet 1000 TIA, Silver Bullet Mini, and Center Loaded antennas, as well as their various configurations. Also looking at the MFJ-1979 17' telescopic whip. http://wolfrivercoils.com Follow me on Twitter. https://twitter.com/k8mrd Here's a bunch of links to stuff I use. Bioenno BLF-1203W: https://amzn.to/3bXsRhP Bioenno BLF-1203AB: https://amzn.to/39OAW74 Bioenno BLF-1206A: https://amzn.to/2XaWQ1L Bioenno 20AH LiFePO4 Battery: https://amzn.to/2XfZPWT Bioenno 12AH LiFePO4 …