Tuesday, February 18, 2020

Linear Loading-Antenna Lengths & Calculations.

If you can't see the video, please insert this title URL into your browser search box:  https://www.youtube.com/watch?v=6-COCfj2D5Q.  This is Post 2149 in a continuing series of simple ham radio antennas.

Another way of getting nearly full dipole performance with a short antenna is to apply linear loading to your antenna.

In this video from Tim (G5TM), we get a good general discussion of both the theoretical and practical applications of this antenna design.

Thanks for joining us today.

Aloha es 73 de Russ (KH6JRM).

Here are some of Tim's observations:

"An overview of the linear loading experiment findings and some information on antenna lengths for you. Here are the other videos in my Linear Loading journey: 1. Shortening a 40 meter quarter wave vertical: https://www.youtube.com/watch?v=cmqEa... 2. Shortening a 10 metre dipole using linear loading: https://www.youtube.com/watch?v=Dcdk4... 3. Short 40m dipole for a small garden: https://www.youtube.com/watch?v=AO9Xj... 4. Getting 80m into a small garden: https://www.youtube.com/watch?v=WWKlj... 5. Using a third wire to linear load an antenna: https://www.youtube.com/watch?v=CxiXz..."

Monday, February 17, 2020

How To Install A Coaxial Cable F Connector

If you can't see the video, please insert this title URL into your browser search box: https://www.youtube.com/watch?v=GhswQ0l3Qvk.  This is Post 2148 in a continuing series of simple ham radio antennas.

Over the past several years, I've used a variety of coaxial cables and even more connectors to complete my antenna experiments.  My best source of coaxial cable has been my neighborhood cable TV installer, who often has suitable lengths of RG-59 / RG-6 cable after a major cable installation.  I've found RG-59 and RG-6 (73-75 ohm impedance) a good substitute for 50 ohm RG-58, RG-8, and RG-8X coaxial cable.  The mismatch isn't too great, and an antenna "tuner" can make the cable suitable for dipoles and inverted Vs.

The only negative side of RG-59/RG-6 is the need for F connectors and adapters to convert F connectors to the common SO-239 found on many coaxial cables and transceivers.

In this excellent tutorial from "Helpful DIY", we get a complete guide to installing F connectors--something that could help you get a decent coaxial feed line at little cost.

Here's a brief explanation of the process involved:
"In this video, I show you how to install a coaxial cable F connector. It is a full tutorial, and although I use some specific tools for the process in the video, the same end result can be accomplished with some regular tools that you have around your house. All that you have to do is strip the coaxial cable to the appropriate lengths, and then install the F connector. I use a compression tool to install the F connector, but you can easily use a twist on F connector if you don't have the appropriate coaxial cable tool! CONNECT WITH ME: Instagram - https://www.instagram.com/mikechimmy/ SUBSCRIBE TO MY CHANNEL: https://youtube.com/subscription_cent... FREE DIY ADVICE EBOOK: https://gumroad.com/l/vFujc Disclaimer: Some of the links in this description may be affiliate links. All opinions are my own."
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For the latest Amateur/Ham Radio news and information, please visit these websites:

http://www.HawaiiARRL.info.
http://www.arrl.org.
http://www.blubrry.com/arrlaudionews/
http://www.hamradioupdate.com.
http://www.southgatearc.org.
https://oahuarrlnews.wordpress.com.
https://hamradiohawaii.wordpress.com.
https://bigislandarrlnews.com.
https://www.eham.net.
https://paper.li/f-1576465810 (breaking Amateur/Ham Radio News).

Thanks for joining us today.

Aloha es 73 de Russ (KH6JRM).

Sunday, February 16, 2020

DIY Discone Antenna.

If you can't see the video, please insert this title URL into your browser search box:  https://www.youtube.com/watch?v=JvSfvrkXAoQ.  This is Post 2147 in a continuing series of simple ham radio antennas.

Thanks to Stuart (KB1HQS), for this imaginative approach to building a simple VHF Discone Antenna.  Other than some audio problems, the video is fascinating, creative, and just plain "cool."

As Stuart explains, you don't need much to get on the air with this antenna:

"This is a brief video showing how to build a DIY discone antenna out of items you may have in your house. While the sound/video quality is terrible due to my camera dying, the content proves a point: you don't always have to buy an antenna to make contacts. 73, Stuart KB1HQS.com ★ FOLLOW ME HERE ★ Website: KB1HQS.com Twitter: @KB1HQS"

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For the latest Amateur/Ham Radio News and Information, please visit these websites:

http://www.HawaiiARRL.info.
http://www.arrl.org.
http://www.blubrry.com/arrlaudionews/
http://www.hamradioupdate.com.
http://www.southgatearc.org.
https://oahuarrlnews.wordpress.com.
https://hamradiohawaii.wordpress.com.
https://bigislandarrlnews.com.
https://www.eham.net.
https://paper.li/f-1576465810 (breaking Amateur/Ham Radio News).

Thanks for joining us today.

Aloha es 73 de Russ (KH6JRM).

Saturday, February 15, 2020

The Mighty Rhombic, The King of Antennas (AD #128).

If you can't see the video, please insert this title URL into your browser search box:   https://www.youtube.com/watch?v=fmWlOisao-I This is post 2146 in a continuing series on simple ham radio antennas.

If you have a large rural property, you may want to design, build, and use a Rhombic Antenna--something David Casler (KE0OG) calls "The King of Antennas."  The Rhombic is excellent for point-to-point communications and exhibits a very low takeoff angle--a definite plus for DX.

Here's David's analysis of this classic DX Antenna:

"There was a time, back in the 1930s and 1940s, when the rhombic antenna was the king. A remarkable antenna that had phenomenal directivity and an extraordinarily low elevation angle made it the antenna of choice for point-to-point HF links. Here's a little history, plus an exploration using EZNEC+. Phenomenal antenna! Subscribe: https://youtube.com/davidcasler. 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://www.dcasler.com/ask-dave/ or http://www.ke0og.net/ask-dave/ To order the old Technician videos on DVD: http://dcasler.com/how-to-buy-technic... To order the most recent and up-to-date Amateur Extra videos on a thumb drive: http://dcasler.com/aevids-on-stick/ Theme music is "Sour Tennessee Red," by John Deley and the 41 Players, courtesy YouTube Music Library. I use drawings from OpenClipArt.org, including the "walking man" Technician training videos, see http://www.ke0og.net/training/ General training videos, see http://www.ke0og.net/general/ Amateur Extra training videos, see http://www.ke0og.net/extra/ List of the Ask Dave videos, see http://dcasler.com/ask-dave/#askdavelist Thanks to my sweet wife, Loretta, KBØVWW, for both audio and video assistance! (Her website is www.aldea-art.com.) My primary website: http://www.dcasler.com The ham radio part of my website (direct link): http://www.ke0og.net My publishing website: http://www.mtsneffelspress.com, where you can find my fantasy and science fiction books, as well as some local history books I publish for the Ridgway Railroad Museum and the Ouray County Historical Society My Amazon author page, which lists my print and Kindle books: http://www.amazon.com/-/e/B00471I0Q4. And I'm now reading (producing) audiobooks! See my first effort here: https://goo.gl/0GTHsW I'm often asked what equipment I use to create the videos. The devices include the Panasonic DMC-G7 camera, Panasonic HDC-TM90 video camera, GoPro Hero2 HD camera, Tascam DR-05 audio recorder, Audio-Technica ATR-3350 lapel microphone, Sony Cyber-shot DSC-W560 digital camera, the Kodak Zi-8 video camera, my iPhone 5S, and Pentax K100D DSLR. Software used: CyberLink PowerDirector 13 on a Toshiba S55-A5294, also using Smoothdraw 4.0.5.0, FastStone Image Viewer 5.3, FastStone Capture 8.0, Audacity 2.1.1, LibreOffice 5.0.4.2, and Ink2Go 1.7.2. You can see how my studio is set up by viewing https://youtu.be/wFSQ8vtNA5A. Twitter: @dcasler"
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For the latest Amateur/Ham Radio News and Information, please visit these websites:


http://www.HawaiiARRL.info.
http://www.arrl.org.
http://www.blubrry.com/arrlaudionews/
http://www.hamradioupdate.com.
http://www.southgatearc.org.
https://oahuarrlnews.wordpress.com.
https://hamradiohawaii.wordpress.com.
https://bigislandarrlnews.com.
https://www.eham.net.
https://paper.li/f-1576465810 (breaking Amateur/Ham Radio News).

Thanks for joining us today.

Aloha es 73 de Russ (KH6JRM).


Friday, February 14, 2020

2 Meter VHF Quarter Wave Ground Plane Antenna. Post 2145.

If you can't see the video, please insert this title URL into your browser search box: https://www.youtube.com/watch?v=Vxft-rYHGDw.

Thanks to Michael Martens (KB9VBR) for this simple, inexpensive, and totally elegant 2 Meter Ground Plane Antenna.  This antenna is suitable for both home and portable use.

Here are some general comments from Michael about this antenna:

"Are you looking for a fun and easy antenna project? The 1/4 ground plane might be just the ticket. This particular ground plane is constructed out of an SO-239 chassis connector, so the radiator is attached to the center conductor of the connector and the radials each come off the base. Resources: SO-239 Chassis Connector: https://amzn.to/2vWrddF Iso-Tip Solderpro 90 kit: https://amzn.to/2PnzRtW Support Ham Radio Q&A by shopping at Amazon: http://amzn.to/2kO6LH7 Read my blog: http://www.jpole-antenna.com Colophon: Camera - Panasonic GH4: https://amzn.to/2GV2Og1 Lens - Panasonic 12-35 f2.8: https://amzn.to/2GWC5zU Microphone: Azden Pro-XD wireless lav: https://amzn.to/2qt3vDc Music by license: http://www.premiumbeats.com "Bossa Antigua" Kevin MacLeod (incompetech.com) Licensed under Creative Commons: By Attribution 3.0 License http://creativecommons.org/licenses/b... #groundplaneantenna #hamradio #emcomm"
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For the latest Amateur/Ham Radio news and information, please visit these websites:

http://www.HawaiiARRL.info.
http://www.arrl.org.
http://www.blubrry.com/arrlaudionews/
http://www.hamradioupdate.com.
http://www.southgatearc.org.
https://oahuarrlnews.wordpress.com.
https://hamradiohawaii.wordpress.com.
https://bigislandarrlnews.com.
https://www.eham.net.
https://paper.li/f-1576465810 (breaking Amateur/Ham Radio News).

Thanks for joining us today.

Aloha es 73 de Russ (KH6JRM).

Thursday, February 13, 2020

Horizontal Loop Antenna Experiments. Post 2144.

If you can't see the video, please insert this title URL into your browser search box:  https://www.youtube.com/watch?v=OLq3nBQppqg

A great multiband HF antenna is the classic "Delta Loop."  The antenna is simple, fairly inexpensive, and offers a small bit of gain over a dipole antenna.

In this well-made video from Rob Wagner, we see several delta loop configurations and and learn how these loops compare to a dipole antenna.

Here are some of Rob's observations:

"This video describes my experiments with a new antenna for me, the horizontal loop a.k.a. sky loop antenna. We talk about the design and installation, and strengths of this antenna in terms of low noise. There are some examples of this antenna in action in comparison to dipoles. For more information go to the Mount Evelyn DX Report: http://www.medxr.blogspot.com.au SUBSCRIBE to this channel. Thanks for watching!"

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For the latest Amateur/Ham Radio news and information, please visit these websites:

http://www.HawaiiARRL.info.
http://www.arrl.org.
http://www.blubrry.com/arrlaudionews/
http://www.hamradioupdate.com.
http://www.southgatearc.org.
https://oahuarrlnews.wordpress.com.
https://hamradiohawaii.wordpress.com.
https://bigislandarrlnews.com.
https://www.eham.net.
https://paper.li/f-1576465810 (breaking Amateur/Ham Radio News).

Thanks for joining us today.

Aloha es 73 de Russ (KH6JRM).

Wednesday, February 12, 2020

So you think you need an antenna analyzer. Post 2143.

If you can't see the video, please insert this title URL into your browser searchbox:  https://www.youtube.com/watch?v=4NJbC1PeMEI

This intriguing article from John Nass ("Ham Radio Crash Course") isn't your usual promotional piece we often find on the internet.

John argues that, while an antenna analyzer is a useful tool for antenna design, it's not required to build a simple, effective antenna.

Here are some of John's remarks:

"A discussion came up on the HRCC facebook page over if an antenna analyzer was needed to setup an amateur radio antenna properlly. The answer is no, most of the time while it might make the job easier, an analyzer is not needed and I'll explain why in this video. Monthly newsletter, stickers, private content: https://www.patreon.com/hoshnasi Links to products in the video: https://www.amazon.com/shop/hamradioc... As an Amazon Associate I earn from qualifying purchases. Current Shack Config: ICOM 7300: https://amzn.to/2sVdpOq ICOM 2730a: https://amzn.to/2JqrASg MFJ-4230DMP: http://www.mfjenterprises.com/Product... G5RV: https://amzn.to/2KfETGv Souncloud................► https://soundcloud.com/hoshnasi Discord.....................► https://discord.gg/xhJMxDT Facebook.................►https://goo.gl/cv5rEQ Twitter......................► https://twitter.com/Hoshnasi Instagram.................► https://instagram.com/hoshnasi SnapChat..................► @Hoshnasi Companies can send demo products to: Josh Nass P.O Box 5101 Cerritos, Ca. 90703-5101"

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For the latest Amateur/Ham Radio news and information, please visit these websites:

http://www.HawaiiARRL.info.
http://www.arrl.org.
http://www.blubrry.com/arrlaudionews/
http://www.hamradioupdate.com.
http://www.southgatearc.org.
https://oahuarrlnews.wordpress.com.
https://hamradiohawaii.wordpress.com.
https://bigislandarrlnews.com.
https://www.eham.net.
https://paper.li/f-1576465810 (breaking Amateur/Ham Radio News).

Thanks for joining us today.

Aloha es 73 de Russ (KH6JRM).

Tuesday, February 11, 2020

Salt Water Dummy Load. Post 2142.

If you can't see the video, please insert this title URL into your browser search box:  https://www.youtube.com/watch?v=Dgm5KwcAzmI.

Every ham shack needs a "dummy load" to test rigs and make adjustments without creating RF interference.

In this video from Darrell ("Radionut63"), we see how simple tools, some wire, and a small amount of salt water can create an emergency dummy load for your shack or portable operation.

Just be aware, however, that dummy loads can radiate RF if you're not careful with the assembly process.

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For the latest Amateur/Ham Radio news and information, please visit these websites:

http://www.HawaiiARRL.info.
http://www.arrl.org.
http://www.blubrry.com/arrlaudionews/
http://www.hamradioupdate.com.
http://www.southgatearc.org.
https://oahuarrlnews.wordpress.com.
https://hamradiohawaii.wordpress.com.
https://bigislandarrlnews.com.
https://www.eham.net.
https://www.paper.li/f-1576465810 (breaking Amateur/Ham Radio News).

Thanks for joining us today.

Aloha es 73 de Russ (KH6JRM).

Monday, February 10, 2020

Building a Doublet Aerial-Antenna. Post 2141.

If you can't see the video, please insert this title URL into your browser search box:  https://www.youtube.com/watch?v=vAYbkVhsSBY.

If you need a simple, efficient multiband HF antenna, please trye the classic HF "Doublet Antenna."

In this well-made video, "One Time Pad" takes us step-by-step through the design, construction, testing, and use phases of this useful, easily built antenna.

Here are some suggestions from "One Time Pad":

ulti –strand Flexweave) Ladder line/Open wire/Ribbon (I used 300Ω ribbon because its neater) x3 eye bolts with associated nuts as washers x1 straight wastewater pipe connector x2 access plugs for above wastewater pipe connector x2 wing nuts and bolts x2 Dog bone Isolators (to isolate end of each antenna leg) x1 spool Rosin core solder (i.e. solder with embedded flux) Cable ties Heat shrink tubing Mast Components: You will need to determine your mast location in advance. You will also need to determine where each (equally sized) leg of your antenna will end and then identify to what you will fix them to. Remember, the legs have to be electrically isolated wherever they terminate. x1 antenna mast (may take more than one section to reach desired height) x2 sets T & K wall brackets (to mount mast) Fixing bolts and Rawl plugs for above brackets U Bolts to fix mast to brackets x1 long bolt to act as antenna boom with fixings to hold pulley x1 Pulley x1 carabineer x1 rope/cord to hoist antenna Fixings to anchor dog bone isolators (dependent on situation) Tools: Screwdrivers (manual/electric) Spanners Socket set/torque wrench Drill (with selectable hammer action) Drill bits for metal (for work on mast) Drill bits for concrete/brick (for mounting mast brackets) Drill stand (with vice) Soldering Iron (need minimum 40W to do large gauge antenna wire) Heat gun (for heat shrink tubing) Permanent marker (for marking antenna length etc) Stanley knife Small file Safety googles Remember Be safe! I needed help with ladders etc. http://southdublinradioclub.weebly.com
SHOW LESS

Sunday, February 9, 2020

Antenna Launchers. Post 2140.

If you can't see the video, please insert this title URL into your browser search box:  https://www.youtube.com/watch?v=xHuzVcfwE28

Tall trees can serve as excellent antenna supports for a variety of HF/VHF/UHF antennas.  The problem with trees is getting your antenna launched successfully without tangling your antenna elements in branches or other obstructions.

In the video, Bob Heil (K9EID) shows you a fairly new antenna launcher that should help you place antennas where you want them without undershooting or overshooting the tree tops.

This video selection can be found here for further information:

https://twit.tv/hn/263.

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For the latest Amateur/Ham Radio news and information, please visit these websites:

http://www.HawaiiARRL.info.
http://www.arrl.org.
http://wwwblubrry.com/arrlaudionews/
http://www.hamradioupdate.com.
http://www.southgatearc.org.
https://oahuarrlnews.wordpress.com.
https://hamradiohawaii.wordpress.com.
https://bigislandarrlnews.com.
https://www.eham.net.
https://paper.li/f-1576465810 (breaking amateur/ham radio news).

Thanks for joining us today.

Aloha es 73 de Russ (KH6JRM).

Saturday, February 8, 2020

Best First Amateur Ham Radio HF Antenna for new operators

If you can't see the video, please insert this title URL into your browser search box:  https://www.youtube.com/watch?v=wG3oS-2QrFE.  This is post 2139   in a continuing series of simple ham radio antennas.

Most radio amateurs remember their first antenna.  Mine was an ungainly 100-ft/30.48 m piece of speaker wire running into a homebrew L "tuner".  I managed to work many DX contacts with this less-than optimum random wire.  Of course, my old Heathkit HW-101 was very forgiving in those days.

In this video, Callum (M0MCX) reminisces about his first HF antenna-a beautiful delta loop mounted about 7 m (23.96 ft) above ground.

Callum takes you back to that day and shows you how to design, build, and test this versatile HF antenna.  An excellent tutorial for both experienced and newly-licensed ham radio operators.

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For the latest Amateur/Ham Radio news and information, please visit these websites:

http://www.HawaiiARRL.info.
http://www.arrl.org.
http://www.blubrry.com/arrlaudionews/
http://www.hamradioupdate.com.
http://www.southgatearc.org.
https://www.eham.net.
https://oahuarrlnews.wordpress.com.
https://hamradiohawaii.wordpress.com.
https://bigislandarrlnews.com.
https://paper.li/f-1576465810 (breaking Amateur/Ham Radio News).

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Thanks for joining us today.

Aloha es 73 de Russ (KH6JRM).

Friday, February 7, 2020

Ham Radio - Get on 630 meters with a bucket variometer!


If you can't see the video, please insert this title URL into your browser search box: https://www.youtube.com/watch?v=jdoaT-nHkfc.  This is post 2138 in a continuing series of simple ham radio antennas.

If you need an inexpensive, easy way to get on the 630 meter amateur radio band, then this video from Kevin Loughin (KB9RLW) may be helpful.

Kevin takes you step-by-step through the design, construction, and testing of this simple way to get on the 630 meter band.

Here are some of Kevin's observations about the project:

"A slightly long build video on the bucket vario. There was a lot to cover! You can get on 630 meters without much effort, hope to hear you on the band. Article referenced about early radio experimentation: https://www.nonstopsystems.com/radio/... Hall of flame page: http://njdtechnologies.net/hall-of-fl... 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 (Node: 519521)"

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For the latest Amateur/Ham Radio news and information, please visit these websites:

http://www.HawaiiARRL.info.
http://www.arrl.org.
http://www.blubrry.com/arrlaudionews/
http://www.hamradioupdate.com.
http://www.southgatearc.org.
https://oahuarrlnews.wordpress.com.
https://hamradiohawaii.wordpress.com.
https://bigislandarrlnews.com.
https://www.eham.net.
https://https://paper.li/f-1576465810 (breaking Amateur.Ham Radio News).

Thanks for joining us today.

Aloha es 73 de Russ (KH6JRM).