Friday, June 30, 2017

HAM Radio in an HOA - Backyard MFJ 1620T Hamstick. Post #1175.


If you can't view this video, please insert this title URL into your browser search box: https://www.youtube.com/watch?v=63zMjG6y2jQ.

Here's another simple antenna solution for radio amateurs living in deed-restricted properties (HOAs and CC&Rs).  In this video from "remingtonh", we see how a MFJ-1620T "hamstick", a simple ground radial system, and a small tripod can get you on the air.  The system is portable, easy to set up, and can be disguised by the natural features of your property.  This antenna would make an excellent addition to your emergency "go kit".

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

http://www.HawaiiARRL.info.
https://oahuarrlnews.wordpress.com.
https://bigislandarrlnews.com.
http://www.kh6jrm.info (breaking news for radio amateurs).
http://www.arrl.org.
http://www.arrl.org/arrl-audio-news (a weekly podcast published each Friday).

Other sites of interest:

http://hawaiisciencedigest.com (science and technology news for radio amateurs).
https://hawaiiintelligencedigest.com (trends in geopolitical intelligence and cybersecurity).
https://paper.li/f-1482109921 (my daily intelligence briefing).

Be sure to check the blog sidebars for more antenna and propagation articles.

Opinions expressed in this blog are mine unless otherwise stated.

Thanks for joining us today.

Aloha es 73 de Russ (KH6JRM)

Thursday, June 29, 2017

Four-Foot Vertical 20m Magnetic Wire Loop Stealth Antenna. Post #1174.


Four-Foot Vertical 20m Magnetic Wire Loop Stealth Antenna
(http://www.dxzone.com/cgi-bin/dir/jump2.cgi?ID=32750).
Accessed on 29 June 2017, 20:10 hrs, UTC.
Author:  W0QL.
Please click link to read the full article.

Comment:

This unusual 20 meter magnetic wire loop antenna is based on a design by Russell Prack (K5RP), and was originally  published the "ARRL Antenna Compendium, Volume 2", page 39.

W0QL made some alterations to Prack's design, making it nearly invisible to neighbors--perfect for stealth operations.  Although the vertical height of this antenna is only 4-feet/1.219 meters, it performs better than most magnetic loop antennas.

W0QL includes a variety of documentation, including photographs and comparisons with other types of antennas.  If you live in a deed-restricted property (HOAs and CC&Rs), you may want to consider this antenna for your ham radio activities.

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

http://www.HawaiiARRL.info.
https://oahuarrlnews.wordpress.com.
https://bigislandarrlnews.com.
http://www.kh6jrm.info (breaking news for radio amateurs).
http://www.arrl.org
http://www.arrl.org/arrl-audio-news (a weekly podcast published every Friday afternoon).

Other sites of interest:

http://hawaiisciencedigest.com (science and technology news for radio amateurs).
https://hawaiiintelligencedigest.com (trends in geopolitical intelligence and cybersecurity).
https://paper.li/f-1482109921 (my daily intelligence briefing).

Be sure to visit the blog sidebars for more antenna and propagation articles.

Opinions expressed in this blog are mine unless otherwise stated.

Thanks for joining us today.

Aloha es 73 de Russ (KH6JRM)

Wednesday, June 28, 2017

HF Indoor Loop Antenna DIY - Simple & Easy To Build. Post #1173.


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

If you lack the space for a full-sized dipole or vertical antenna for general shortwave or Ham Radio  reception, then this simple, cost effective magnetic loop receiving antenna from "Chappy Happy" may be what you need for your indoor installation.  The antenna is compact in size and is highly directional. Please note the classic Hallicrafters S-38 shortwave receiver used in "Chappy Happy's" tests.  This would be a great weekend project or something to show at your next Amateur Radio club meeting.

For the latest Amateur Radio news and information, please visit these web sites:

http://www.HawaiiARRL.info.
\https://oahuarrlnews.wordpress.com.
https://bigislandarrlnews.com.
http://www.kh6jrm.info (breaking news for radio amateurs).
http://www.arrl.org.
http://www.arrl.org/arrl-audio-news (weekly podcast updated each Friday afternoon).

Other sites of interest:

http://hawaiisciencedigest.com (science and technology news for radio amateurs).
https://hawaiiintelligencedigest.com (trends in geopolitical intelligence and cybersecurity).
https://paper.li/f-1482109921 (my daily intelligence briefing).

Be sure to check the blog sidebars for more antenna and propagation articles.

Opinions expressed in this blog are mine unless otherwise stated.

Thanks for joining us today.

Aloha es 73 de Russ (KH6JRM)

Tuesday, June 27, 2017

Ham Radio - My second HF antenna. A stealth end fed wire for 80 - 10 m...


If you can't view this video, please insert this title URL into your browser search box: https://www.youtube.com/watch?v=oMchB-bML98. This is post #1172 in a continuing series about Ham Radio Antennas.

Here's an experimental end-fed wire antenna that is simple, inexpensive, and stealthy--just right for radio amateurs living in deed-restricted homes and apartments.  Kevin Loughin (KB9RLW) began building this antenna as an experiment and ended up with an effective, multiband HF antenna (80-10 meters) that could be used as backup antenna for his regular antennas.

In this video, Kevin takes us step-by-step through the design, construction, and placement of this end-fed wire antenna.  As explained in the video, you will need an antenna transmatch (i.e. "tuner"), a UNUN made from T-50-2 torroids, and a counterpoise/ground radial system to get the maximum efficiency out of this antenna.  All of the key components of the antenna can be confined to the perimeter of your home or small lot. Operation on 160 meters is possible with a well-built antenna "tuner."

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

http://www.HawaiiARRL.info.
https://oahuarrlnews.wordpress.com.
https://bigislandarrlnews.com.
http://www.kh6jrm.info (breaking news for radio amateurs).
http://www.arrl.org.
http://www.arrl.org/arrl-audio-news (a podcast published every Friday afternoon).

Other sites of interest:

http://hawaiisciencedigest.com (science and technology news for radio amateurs).
https://hawaiiintelligencedigest.com (trends in geopolitical intelligence and cybersecurity).
https://paper.li/f-1482109921 (my daily intelligence briefing).

Opinions expressed in this blog are mine unless otherwise stated.

Thanks for joining us today.

Aloha es 73 de Russ (KH6JRM)


Monday, June 26, 2017

2-Element Single Mast Wire Beam with 4 Switchable Directions. Post #1171.

2-Element Single Mast Wire Beam with 4 Switchable Directions
(http://www.eham.net/articles/39030).
Accessed on 26 June 2017, 15:00 hrs, UTC.
Authors:  Chavdar Levkov, Jr. (LZ1ABC) and Chavdar Levkov (LZ1AQ).
Please click link to read the full article.

Comment:

If you can't erect a tower and a multi-element 20 meter beam on your property, you may want to use this idea from Chavdar Levkov, Jr. (LZ1ABC) and Chavdar Levkov (LZ1AQ).  This 2-element single mast wire beam for 20 meters offers high performance, directivity, and reasonable cost.

The Levkov's present an easy-to-understand, thoroughly documented tutorial on the design, construction, and use of this wire antenna.  The Levkov's provide plenty of photos, diagrams, test results, and construction tips to make this project a success.

The post is divided into several bite-sized discussions:

Antenna description
Switcher schematics
RF transformers
Feeders
Control Cable
Capacitors
Relays
Losses
Erection of the antenna
Preliminary results
Appendix (antenna modeling, comments, links to reference sources, and performance videos).

This antenna will fit most urban lots and will provide plenty of action on 20 meters.

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

http://www.HawaiiARRL.info.
https://oahuarrlnews.wordpress.com.
https://bigislandarrlnews.com.
http://www.kh6jrm.info (breaking news for radio amateurs).
http://www.arrl.org.
http://www.arrl.org/arrl-audio-news (podcast issued every Friday afternoon).

Other sites of interest:

http://hawaiisciencedigest.com (science and technology news for radio amateurs).
https://hawaiiintelligencedigest.com (trends in geopolitical intelligence and cybersecurity).
https://paper.li/f-1482109921 (my daily intelligence briefing).

Be sure to check the blog sidebars for more antenna and propagation articles.

Opinions expressed in this blog are mine unless otherwise stated.

Thanks for joining us today.

Aloha es 73 de Russ (KH6JRM)

Sunday, June 25, 2017

80 Meter Half Square. Post #1170.


If you can't watch this video, please insert this title URL into your browser search box: https://www.youtube.com/watch?v=2SBGdPMnH-E. You can also insert the post title into your browser search box to bring up the video.

If you spend much of your operating time contacting certain sections of the world, you may want to design and build a half square antenna for your favorite band.  I've used half square antennas for 20,15, and 10 meters with good results. At these frequencies, construction of this phased, bidirectional vertical antenna is fairly simple and can be aimed in the direction of your choice.  A theoretical gain of 3dB is possible, making the half square a worthwhile experiment.

In this post, Don Johnson (N4DJ) takes the half square a step further by building and using an 80 meter version of this antenna.  In the 80 meter band, this antenna can be quite large, often necessitating extra help in building and aiming the antenna in the preferred direction.  If you're willing to spend some time building this antenna, the rewards will pay off in a low radiation angle (around 15 degrees) and more contacts.  The half square antenna can be a valued part of your antenna "farm."

For the latest Amateur Radio news and information, please visit these web sites:

http://www.HawaiiARRL.info.
https://oahuarrlnews.wordpress.com.
https://bigislandarrlnews.com.
http://www.kh6jrm.info (Amateur Radio News & Information).
http://www.arrl.org
http://www.arrl.org/arrl-audio-news (weekly podcast issued each Friday).

Other sites of interest:

http://hawaiisciencedigest.com (science and technology news for radio amateurs).
https://hawaiiintelligencedigest.com (trends in geopolitical intelligence and cybersecurity).
https://paper.li/f-1482109921 (my daily intelligence briefing).

Be sure to check the blog sidebars for more antenna and propagation articles.

Opinions expressed in this blog are mine unless otherwise stated.

Thanks for joining us today.

Aloha es 73 de Russ (KH6JRM)

Saturday, June 24, 2017

Speaker Wire 44' Doublet Antenna. Post #1169


If you can't view this video, please insert this title URL into your browser search box: https://www.youtube.com/watch?v=e3x_uOzIFJ4.

Here's a simple, easy-to-build 40 through 10 meter HF Doublet Antenna made with commonly available parts.  In this video, Craig Sheppard uses 44-feet/13.414 meters of speaker wire, insulators made from milk bottle caps, a fiberglass crappie fishing pole, and a few hiking poles to make a lightweight portable HF antenna suitable for Field Days or any remote location.

For the latest Amateur Radio news and information, please visit these web sites:

http://www.HawaiiARRL.info.
https://oahuarrlnews.wordpress.com.
https://bigislandarrlnews.com.
http://www.kh6jrm.info (Amateur Radio News & Information).
http://www.arrl.org.
http://www.arrl.org/arrl-audio-news (this podcast is updated each Friday).

Other sites of interest:

http://hawaiisciencedigest.com (science and technology news for radio amateurs).
https://hawaiiintelligencedigest.com (trends in geopolitical intelligence and cybersecurity).
https://paper.li/f-1482109921 (my daily intelligence briefing).

Opinions expressed in this blog are mine unless otherwise stated.

Thanks for joining us today.

Aloha es 73 de Russ (KH6JRM)

Friday, June 23, 2017

Balloon Antenna Field Day 2016. Post #1168.


If you can't view this video, please enter this title URL into your browser search box: https://www.youtube.com/watch?v=GEDneotW3ko.

Here's an interesting, if somewhat complicated antenna worth trying for Field Days or any portable operation dedicated to the 160 meter Amateur Radio Band.
In this video from "HAMPREPPER.COM", we see how a few friends prepare a set of helium balloons to support a full 1/4 wavelength 160 meter antenna (around 135 feet/41.158 meters).  This project will take some coordination and excellent weather to make this antenna work.  With propagation favoring the 160, 80, and 40 meter bands this year, you may want to consider a balloon-supported antenna for Field Day, which happens on 24-25 June 2017.

For the latest Amateur Radio news and information, please visit these web sites:

http://www.HawaiiARRL.info.
https://oahuarrlnews.wordpress.com.
https://bigislandarrlnews.wordpress.com (becomes https://bigislandarrlnews.com on 25 June 2017).
http://www.kh6jrm.info (breaking news for radio amateurs).
http://www.arrl.org.
http://www.arrl.org/arrl-audio-news (podcast issued each Friday afternoon).

Other sites of interest:

http://hawaiisciencedigest.com (science and technology news for radio amateurs).
https://hawaiiintelligencedigest.com (trends in geopolitical intelligence and cybersecurity).
https://paper.li/f-1482109921 (My daily intelligence briefing).

Be sure to check the blog sidebars for more antenna and propagation articles.

Opinions expressed in this blog are mine unless otherwise stated.

Thanks for joining us today.

Aloha es 73 de Russ (KH6JRM)

Thursday, June 22, 2017

Antenna Deployment with Slingshot. Post #1167.


If you can't view this video, please insert this title URL into your browser search box: https://www.youtube.com/watch?v=XP9Arp7V9RA.

Thanks to Al (VE3RDD) and his fellow hams from the Bernie Amateur Radio Club for this refinement of an old antenna launching technique.  Al has paired a common slingshot with a fishing reel, fishing line, and a sinker to launch a Field Day antenna into nearby trees.  After a little practice, you'll be able to launch antennas into tree cover with few problems.  Be sure to participate in the 2017 ARRL Field Day Emergency Communications Exercise on 24 and 25 June 2017.
You don't have to belong to an amateur radio club to take part of the festivities. You can even run a portable ham station from your vehicle or from your own backyard.

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

http://www.HawaiiARRL.info.
https://oahuarrlnews.wordpress.com.
https://bigislandarrlnews.wordpress.com.
http://www.kh6jrm.info (breaking news for radio amateurs).
http://www.arrl.org.
http://www.arrl.org/arrl-audio-news (weekly podcast updated each Friday).

Other sites of interest:

http://hawaiisciencedigest.com (science and technology news for radio amateurs).
https://hawaiiintelligencedigest.com (trends in geopolitical intelligence and cybersecurity).
https://paper.li/f-1482109921 (My Daily Intelligence Briefing).

Be sure to check the blog sidebars for more antenna and propagation articles.

Opinions expressed in this blog are mine unless otherwise stated.

Thanks for joining us today.

Aloha es 73 de Russ (KH6JRM)

Wednesday, June 21, 2017

Random Wire Antennas. Post #1166.


Random Wire Antennas
(http://www.arrl.org/random-wires).
Accessed on 21 June 2017, 23:50 hrs, UTC.
Please click link or insert title into your browser to read the full article.

Comment:

Random wire antennas have been around since the dawn of Amateur Radio early in the 20th century.  Properly designed and attached to a suitable ground radial or counterpoise system, a random wire antenna will perform well and give you many contacts on Field Day or any other portable operation.

This article from the ARRL, gives you all the information you need to make a simple, inexpensive, and efficient random wire antenna.

The best length of a random wire antenna seems to be around 1/4 wavelength of your chosen band.  If you want to operate from 80 through 10 meters, make the wire length to accommodate the 80 meter band (around 135-feet/41.158 meters). For multiband HF use, an antenna "tuner" and a ground radial/counterpoise system are required.

According to the ARRL, a counterpoise or ground radial system supplies the "missing half" of your antenna and will do a lot to reduce RF in the shack:

"A counterpoise is simply a long, insulated wire that attaches to the ground connection on your antenna tuner. The best counterpoise is 1/4-wavelength at the lowest frequency you intend to use. That’s a lot of wire at, say, 3.5 MHz, but you can loop the wire around the room and hide it from view. The counterpoise acts as the other “terminal” of your antenna system, effectively balancing it from an electrical standpoint."

Good luck on Field Day--24 and 25 June 2017.

Aloha es 73 de Russ (KH6JRM).

Tuesday, June 20, 2017

HF Mobile Antennas and Their Installation. Post #1165.


If you can't view this video, please enter this title URL into your browser search box: https://www.youtube.com/watch?v-MQI2G6uqQhw.

A good, basic introduction to HF mobile antennas and their installation from the staff of Waters and Stanton Ham Store in the UK.  Before you commit to HF mobile operation, please review the suggestions given in this video.  If you already have a HF mobile Amateur Radio Station, consider using it in the upcoming ARRL Field Day event.

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

http://www.HawaiiARRL.info.
https://oahuarrlnews.wordpress.com.
https://bigislandarrlnews.wordpress.com.
http://www.kh6jrm.info (breaking news for radio amateurs).
http://www.arrl.org.
http://www.arrl.org/arrl-audio-news (podcast updated every Friday).

Other sites of interest:

http://hawaiisciencedigest.com (science and technology news for radio amateurs).
https://hawaiiintelligencedigest.com (trends in geopolitical intelligence and cybersecurity).
https://paper.li/f-1482109921 (my daily intelligence briefing).

Be sure to check the blog sidebars for more antenna and propagation articles.

Opinions expressed in this blog are mine unless otherwise stated.

Thanks for joining us today.

Aloha es 73 de Russ (KH6JRM)

Monday, June 19, 2017

Portable indoor antenna. Post #1164.


If you can't view this video, please insert this title URL into your browser search box: https://www.youtube.com/watch?v=JH0RiRHp2Bc.

If your amateur radio operations are confined to the inside of your apartment or home governed by deed-restrictions (CC&Rs and HOAs), you may want to consider these MFJ antennas tested by Mark Elzey.  He does a good job of explaining how the MFJ-1661 and the MFJ-1668 work and what can be expected from them inside  your home.  Of course, it would be preferable to mount these antennas outdoors, but they do a reasonably good job inside.  A compromised antenna is better than no antenna.

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

http://www.HawaiiARRL.info.
https://oahuarrlnews.wordpress.com.
https://bigislandarrlnews.wordpress.com.
http://www.kh6jrm.info (breaking news for radio amateurs).
http://www.arrl.org.
http://www.arrl.org/arrl-audio-news (a weekly news podcast issued each Friday).

Other sites of interest:

http://hawaiisciencedigest.com (science and technology news for radio amateurs).
https://hawaiiintelligencedigest.com (trends in geopolitical intelligence and cybersecurity).
https://paper.li/f-1482109921 (My daily intelligence briefing).

Be sure to check the blog sidebars for more antenna and propagation articles.

Opinions expressed in this blog are mine unless otherwise stated.

Aloha es 73 de Russ (KH6JRM)

Saturday, June 17, 2017

Portable 20 Meter Rotatable Dipole. Post #1163.


If you can't view this video, please enter this title URL into your browser search box: https://www.youtube.com/watch?v=8ijIICTN391.

Helically-wound antennas can be a lot of fun to design, build, and use.  In this video, Bob (KC4FNE) shows us his home-brew 20 meter rotatable dipole antenna during a presentation before the Virginia Tech Amateur Radio Association meeting on 05 February 2014.  The only drawback to these helically-wound antennas is a fairly narrow bandwidth.  I've built a few vertical helix antennas for 40 and 80 meters where vertical space was limited.  All of them performed well, given the narrow bandwidths inherent in the design.  In Bob's design, a ground radial or counterpoise system is not required for operation.

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

http://www.HawaiiARRL.info.
https://oahuarrlnews.wordpress.com.
https://bigislandarrlnews.wordpress.com.
http://www.kh6jrm.info (breaking news for radio amateurs).
http://www.arrl.org.
http://www.arrl.org/arrl-audio-news (a weekly podcast issued by HQ ARRL every Friday).

Other sites of interest:

http://hawaiisciencedigest.com (science and technology news for radio amateurs).
https://hawaiiintelligencedigest.com (trends in geopolitical intelligence and cybersecurity).
https://paper.li/f-1482109921 (My daily intelligence briefing).

Be sure to check the blog sidebars for more antenna and propagation articles.

Opinions expressed in this blog are mine unless otherwise stated.

Thanks for joining us today.

Aloha es 73 de Russ (KH6JRM)

Friday, June 16, 2017

mobile / emergency / field day vhf/uhf radio communications set up. Post #1162.


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

If you're thinking about adding a VHF/UHF station to your 2017 ARRL Field Day site on 24-25 June 2017, you may find this video by "DENMONKEY" useful.  In this video, DENMONKEY assembles his VHF/UHF station using a simple aluminum push up mast, a dual band vertical, and a small dual band yagi beam.  The antenna package is lightweight, easily assembled, and portable.

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

http://www.HawaiiARRL.info.
https://oahuarrlnews.wordpress.com.
htps;//bigislandarrlnews.wordpress.com.
http://www.kh6jrm.info (breaking news for radio amateurs).
http://www.arrl.org.
http://www.arrl.org/arrl-audio-news (podcast issued each Friday).

Other sites of interest:

http://hawaiisciencedigest.com (science and technology news for radio amateurs).
https://hawaiiintelligencedigest.com (trends in geopolitical intelligence and cybersecurity).
https://paper.li/f-1482109921 (my daily intelligence and security briefing).

Be sure to check the blog sidebars for more antenna and propagation articles.

Opinions expressed in this blog are mine unless otherwise stated.

Thanks for joining us today.

Aloha es 73 de Russ (KH6JRM)

Thursday, June 15, 2017

FCC Part 97 Ham Radio Changes. Post #1161.


FCC Part 97 Ham Radio Changes
(http://www.southgatearc.org/news/2017/june/fcc-part-97-ham-radio-changes.htm).
Accessed on 15 June 2017, 14:30 hrs, UTC.
Source:  http://www.southgatearc.org.
Please click link or insert title URL into your browser search box to read the full report.

Comment:

Amateur Radio operators in the United States have waited for almost five years to gain use of the 630 and 2200 meter bands, which were approved by the WRC-12 Conference in Geneva back in 2012.

That dream will become fact sometime this summer.  On 14 June 2017, the FCC WRC-12 Implementation Report and Order was published in the Federal Register, making the WRC-12 recommendations part of the rules and regulations governing the Amateur Radio Service in the United States.

Here are the main points of the Report and Order:

• Part 97 - Allocation of 472–479 kHz and 135.7–137.8 kHz bands to the Amateur Service on a secondary basis.

• Part 15 - § 15.113 Power line carrier systems 
An electric power utility entity shall not operate a new or modified power line carrier (PLC) system in the 135.7–137.8 kHz and/or 472–479 kHz bands if a previously coordinated amateur station pursuant to § 97.301(g)(2) of this chapter is located within one kilometer of the transmission lines conducting the PLC signal.

• Part 80 to authorize radio buoy operations in the 1900–2000 kHz band under a ship station license.

Regarding the implementation date the Report and Order says: 
Effective July 14, 2017, except for amendments to §§ 97.3, 97.15(c), 97.301(b) through (d), 97.303(g), 97.305(c), and 97.313(k) and (l), which contain new or modified information collection requirements subject to the Paperwork Reduction Act of 1995 (PRA), Public Law 104–13, that are not effective until approved by the Office of Management and Budget (OMB). The Commission will publish a document in the Federal Register announcing the effective date once OMB approves.

Read the document at 
https://www.gpo.gov/fdsys/pkg/FR-2017-06-14/pdf/2017-09887.pdf

This is certainly good news for radio amateurs in the United States.  A special thank you goes out to all of those delegates, experimenters, and government officials who made the new access possible.  Pending OMB approval,  radio amateurs in the United States will have official use of the 630/2200 meter bands on 14 July 2017.

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

http://www.HawaiiARRL.info.
https://oahuarrlnews.wordpress.com.
https://bigislandarrlnews.wordpress.com.
http://www.kh6jrm.info (breaking news for radio amateurs).
http://www.arrl.org.
http://www.arrl.org/arrl-audio-news (podcast issued each Friday).

Other sites of interest:

http://hawaiisciencedigest.com (science and technology news for radio amateurs).
https://hawaiiintelligencedigest.com (trends in geopolitical intelligence and cybersecurity).
https://paper.li/f-1482109921 (a daily summary of key geopolitical events around the world).

Be sure to check the blog sidebars for more antenna and propagation articles.

Opinions expressed in this blog are mine unless otherwise stated.

Thanks for joining us today.

Aloha es 73 de Russ (KH6JRM)

Wednesday, June 14, 2017

Attic Fan Dipole on 20/40 meters. Post #1160.


If you can't view this video, please insert this title URL into your browser search box: https://www.youtube.com/watch?v-G9mmLyFh7eY.

In my previous post, I mentioned a simple, easily-made fan dipole covering the 40/20 meter Amateur Radio bands.  This antenna was suitable for a small lot and had the potential of spanning several HF bands with the use of an antenna "tuner."

Can the same principle be applied for radio amateurs living in deed-restricted homes and apartments (CC&Rs and HOAs)?  According to  Patrick Hock, an attic fan dipole antenna covering the 20 and 40 meter bands can be made if you're willing to install the antenna in an attic and can spend some time pruning the antenna for the best SWR on each band.  Patrick accepted that challenge and built a fan dipole in his attic.  The antenna performs very well, considering the limitations inherent in an attic antenna.  If you have an accessible attic in your housing situation, you may want to try this idea from Patrick.

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

http://www.HawaiiARRL.info.
https://oahuarrlnews.wordpress.com.
https://bigislandarrlnews.wordpress.com.
http://www.kh6jrm.info (breaking news for radio amateurs).
http://www.arrl.org.
http://www.arrl.org/arrl-audio-news (podcast updated each Friday).

Other sites of interest:

http://hawaiisciencedigest.com (science and technology news for radio amateurs).
https://hawaiiintelligencedigest.com (trends in geopolitical intelligence and cybersecurity).
https://paper.li/f-1482109921 (breaking news from the worlds of politics, cybersecurity, terrorism, strategic forecasting, and geopolitical intelligence. The blog is entitled "Hawaii Intelligence Daily.).

Be sure to check the blog sidebars for more antenna and propagation articles.

Opinions expressed in this blog are mine unless otherwise stated.

Thanks for joining us today.

Aloha es 73 de Russ (KH6JRM).

Tuesday, June 13, 2017

My 40/20 Meter fan dipole antenna. Post #1159.


If you can't view this video, please insert this title URL into your browser search box: https://www.youtube.watch?v=8DMHVCrJZqY.

Here's another simple, easily made dipole antenna that covers the 40 and 20 meter Amateur Radio bands.  Separate dipoles for each band are joined at a center connector and fed with the same 50-ohm coaxial feed line.  According to KC2IRV, this antenna will also work on 80 meters with a sturdy antenna "tuner." Fifteen meter operation is also possible using the 3rd harmonic of 7 MHz.  SWR will be slightly higher on 15 meters than 40 meters, but can be controlled with an antenna "tuner."  KC2IRV uses 1-inch/2.54 cm PVC plumbing Tees for insulators.  A cheap, multiband HF antenna that works.

For the latest Amateur Radio News and information, please visit these websites:

http://www.HawaiiARRL.info.
https://oahuarrlnews.wordpress.com.
https://bigislandarrlnews.wordpress.com.
http://www.kh6jrm.info (breaking news for radio amateurs).
http://www.arrl.org.
http://www.arrl.org/arrl-audio-news (podcast issued each Friday...suitable for repeater use).

Other sites of interest:

http://hawaiisciencedigest.com (science and technology news fro radio amateurs).
https://hawaiiintelliegencedigest.com (trends in geopolitical intelligence and cybersecurity).
https://paper.li/f-1482109921 (Hawaii Intelligence Daily--breaking news concerning terrorism, politics, geopolitics, strategic forecasting, and online security).

Be sure to check the blog sidebars for more antenna and propagation articles.

Opinions expressed in this blog are mine unless otherwise stated.

Thanks for joining us today.

Aloha es 73 de Russ (KH6JRM)

Hanging a dipole for Field Day. Post #1158.


If you can't view this video, please insert this title URL into your browser search box: https://www.youtube.com/watch?v=Lu_YqfE-Ak8.

Here's another way to launch a dipole antenna over trees at a Field Day site.  Bob Keys (NA4B) is using a clever "crossbow" design to accurately launch a dipole antenna into tall trees at the 1990 Raleigh Amateur Radio Society Field Day location.  Jeff Wittech (AC4ZO) uses a more traditional bow and arrow to shoot a dipole over the trees.  A slingshot can also be used.  You may find these suggestions helpful during the 2017 ARRL Field Day event, 24-25 June 2017.

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

http://www.HawaiiARRL.info.
https://oahuarrlnews.wordpress.com.
https://bigislandarrlnews.wordpress.com.
http://www.kh6jrm.info (breaking news for radio amateurs).
http://www.arrl.org.
http://www.arrl.org/arrl-audio-news (updated every Friday).

Be sure to check the blog sidebars for more antenna and propagation articles.

Opinions expressed in this blog are mine unless otherwise stated.

Thanks for joining us today.

Aloha es 73 de Russ (KH6JRM)

Monday, June 12, 2017

Setting up portable Amateur Radio station VK3KQ for the 2014 Summer VHF/...


If you can't view this video, please enter this title URL into your browser search box: https://www.youtube.com/watch?v=1KjDC0sKUus.

Nicely done video from Ralph Parkhurst (VK3KQ), showing how he and some friends set up their portable station for the summer 2014 VHF/UHF Field Day near Marysville, Victoria, Australia.  As you can see, a lot of work went into preparing the site, building the antennas on site, and taking care of a few minor problems.  You may be able to use some of the ideas presented in this video for the upcoming 2017 ARRL Field Day event on 24-25 June 2017.

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

http://www.HawaiiARRL.info.
https://oahuarrlnews.wordpress.com.
https://bigislandarrlnews.wordpress.com.
http://www.kh6jrm.info (breaking news for radio amateurs).
http://www.arrl.org.
http://www.arrl.org/arrl-audio-news.

Other sites of interest:

http://hawaiisciencedigest.com (science and technology news for radio amateurs).
https://hawaiiintelligencedigest.com (trends in geopolitical intelligence and cybersecurity).

Be sure to check the blog sidebars for more antenna and propagation articles.

Opinions expressed in this blog are mine unless otherwise states.

Thanks for joining us today.

Aloha es 73 de Russ (KH6JRM)

Friday, June 9, 2017

Antenna Launchers. Post #1156.


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

One of the major problems of using portable antennas is getting them high enough off the ground to do some good, particularly where DX contacts are concerned.

In this video from Dr. Bob Heil (K9EID), we get a good discussion of antenna launchers and how they're used to put antennas over high trees or other obstacles. Bob illustrates the general principles of antenna launchers with this new device from Korea.

While this device is certainly an improvement over fishing rod launchers and arrows shot over trees, you may find a simple slingshot works well enough for your location.  Whatever launch method you chose, please be mindful of safety and handle all equipment carefully.

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

http://www.HawaiiARRL.info.
https://oahuarrlnews.wordpress.com.
https;//bigislandarrlnews.wordpress.com.
http://www.kh6jrm.info (breaking news for radio amateurs).
http://www.arrl.org.
http://www.arrl.org/arrl-audio-news (a podcast published each Friday).

Other sites of interest:

http://hawaiisciencedigest.com (science and technology news for radio amateurs).
https://hawaiiintelligencedigest.com (trends in geopolitical intelligence and cybersecurity).

Opinions expressed in this blog are mine unless otherwise stated.

Thanks for joining us today.

Aloha es 73 de Russ (KH6JRM)

Thursday, June 8, 2017

Homebrew 4 band vertical. Post #1155.


If you can't view this video, please insert this title URL into your browser search box: https://www.youtube.com/watch?v=xczCFzEZ1CY.

A nice, simple video tutorial from Darrell Steele (VO1MDS) of St. Johns, Newfoundland, Canada.  In this video, Darrel uses a 16-foot/4.878 meters telescoping aluminium rod, a tapped coil, a coaxial cable feed line, and a simple ground rod to build a vertical antenna covering the 40, 20, 15, and 12 meter Amateur Radio bands.  Bands are selected by changing the tap on the coil.

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

http://www.HawaiiARRL.info.
https://oahuarrlnews.wordpress.com.
https://bigislandarrlnews.wordpress.com.
http://www.kh6jrm.info (breaking news for radio amateurs).
http://www.arrl.org.
http://www.arrl.org/audio-news (updated every Friday).

Other sites of interest:

http://hawaiisciencedigest.com (science and technology news for radio amateurs).
https://hawaiiintelligencedigest.com (trends in geopolitical intelligence and cybersecurity).

Be sure to check the blog sidebars for more antenna and propagation articles.

Opinions expressed in this blog are mine unless otherwise stated.

Thanks for joining us today.

Aloha es 73 de Russ (KH6JRM)

Wednesday, June 7, 2017

QRP RADIO: SPEAKER WIRE ANTENNA! Post #1154.


If you can't view this video, please insert this title URL into your browser search box: https://www.youtube.com/watch?v=9Gyfb7fivuA.

Here's nice, simple antenna made from common audio speaker wire. In this video from K9ARV, we see a simple arrangement that allows for multiband HF operation with a small QRP HF transceiver.  The match box was made by Nelson antenna and is sold on e-Bay.  Note how K9ARV uses available trees to disguise the antenna.  An antenna "tuner" and a suitable ground radial/counterpoise system will enable you to get maximum performance from this basic wire antenna.

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

http://www.HawaiiARRL.info.
https://oahuarrlnews.wordpress.com.
https://bigislandarrlnews.wordpress.com.
http://www.kh6jrm.info (breaking news for radio amateurs).
http://www.arrl.org.
http://www.arrl.org/audio-news (issued each Friday).

Other sites of interest:

http://hawaiisciencedigest.com (science and technology news for radio amateurs).
https://hawaiiintelligencedigest.com (trends in geopolitical intelligence and cybersecurity).

Be sure to check the blog sidebars for more antenna and propagation articles.

Opinions expressed in this blog are mine unless otherwise stated.

Thanks for joining us today.

Aloha es 73 de Russ (KH6JRM)

Tuesday, June 6, 2017

HF Field Ops Gear-up. Dipole Antenna Tuning. Post #1153.


If you can't view this video, please insert this title URL into your browser search box: https://www.youtube.com/watch?v=cgdP8ao71Cc.

Interesting video on how to set up and tune a dipole antenna in field conditions. Note the use of 450 ohm ladder line as the antenna feed line, which enables multiband HF use.  While this particular antenna is designed for 40 meter NVIS (near vertical incident skywave) use, it can be used on bands above 40 meters with ladder line and an antenna "tuner."  The 40 meter version of this antenna can be useful up to approximately 300 miles/486 km--great for local and regional contacts.

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

http://www.HawaiiARRL.info.
https://oahuarrlnews.wordpress.com.
https://bigislandarrlnews.wordpress.com.
http://www.kh6jrm.info (breaking news for radio amateurs).
http://www.arrl.org.
http://www.arrl.org/audio-news (issued every Friday).

Other sites of interest:

http://hawaiisciencedigest.com (science and technology news for radio amateurs).
https://hawaiiintelligencedigest.com (trends in geopolitical intelligence and cybersecurity).

Be sure to check the blog sidebars for more antenna and propagation articles.

Opinions expressed in this blog are mine unless otherwise stated.

Thanks for joining us today.

Aloha es 73 de Russ (KH6JRM)

Monday, June 5, 2017

Ham Radio - Build your own L network antenna tuner. Post #1152.


If you can't view the video, please enter this title URL into your browser search box: https://www.youtube.com/watch/v=EXD9rAOM_o4.

Here's a simple, easy to build, and low cost L network antenna "tuner" that will maximize the performance of a random wire antenna.  Kevin Loughin (KB9RLW) shows us how to use locally available materials to design, build, and use this useful tool for antenna designers.  Kevin's instructions are clear and easy to understand.  Add to this "tuner" a ground radial or counterpoise system and you will have a high performing portable multiband HF antenna.  You may want to enclose this "tuner" in a small metal box to protect it from the weather and to reduce RFI to a minimum.

For the latest Amateur Radio news and information, please visit these web sites:

http://www.Hawaii ARRL.info.
https://oahuarrlnews.wordpress.com.
https://bigislandarrlnews.wordpress.com.
http://www.kh6jrm.info (breaking news for radio amateurs).
http://www.arrl.org.
http://www.arrl.org/audio-news (issued every Friday).

Other sites of interest:

http://hawaiisciencedigest.com (science and technology news for radio amateurs).
https://hawaiiintelligencedigest.com (trends in geopolitical intelligence and cybersecurity).

Be sure to check the blog sidebars for more antenna and propagation articles.

Opinions expressed in this blog are mine unless otherwise stated.

Thanks for joining us today.

Aloha es 73 de Russ (KH6JRM)

Sunday, June 4, 2017

Chameleon P-LOOP 2.0 Portable Magnetic Loop Antenna Field Test. Post #1151.


If you can't view this video, please insert this title URL into your browser search box: https://www.youtube.com/watch/v=Rfbnt4-xg1g.

HF magnetic loop antennas are becoming popular with portable, emergency, and home operations.  Radio amateurs have used these fascinating, man-portable antennas where other antennas aren't practical or desired, especially in deed-restricted homes and apartments governed by HOAs and CC&Rs.

In this video, OH8STN field tests the Chameleon P-LOOP magnetic loop antenna in a practical situation with less than friendly weather.  Despite its limited bandwidth, the magnetic loop antenna is small, easily assembled, and completely portable--something to consider if you're hiking into a remote area or forced to erect temporary antennas in less than favorable housing conditions. Considering its limitations, the Chameleon P-LOOP does fairly well outdoors and should be considered a useful standby antenna for your next Field Day or portable operation.  If you have a bit of mechanical skill, you can also design and build your own magnetic loop antenna.  This antenna would make an excellent club project.

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

http://www.HawaiiARRL.info.
https://oahuarrlnews.wordpress.com.
https://bigislandarrlnews.wordpress.com.
http://www.kh6jrm.info (breaking news for radio amateurs).
http://www.arrl.org.
http://www.arrl.org/audio-news (updated every Friday).

Other sites of interest:

http://hawaiisciencedigest.com (science and technology news for radio amateurs).
https://hawaiiintelligencedigest.com (trends in geopolitical intelligence and cybersecurity).

Be sure to check the blog sidebars for more antenna and propagation articles.

Opinions expressed in this blog are mine unless otherwise stated.

Thanks for joining us today.

Aloha es 73 de Russ l(KH6JRM)

Saturday, June 3, 2017

HF Ham Radio Random Wire Portable Antenna Back Yard Test. Post #1150.


If you can't view this video, please enter this title URL into your browser search box: https://www.youtube.com/watch?v=U44aXzD2LB4.

If you need a simple, inexpensive, and easy to erect HF antenna for Field Day or any other portable operation, you may want to use this idea from Larry (WD0AKX). Larry says he wanted to experiment with a random length wire in his backyard using QRP power and a portable set up to see what he could do with a minimum of equipment.  You will need an antenna "tuner", a 9:1 unun, and a ground radial/counterpoise system to make the antenna work properly.

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

http://www.HawaiiARRL.info.
https://oahuarrlnews.wordpress.com.
https://bigislandarrlnews.wordpress.com.
http://www.kh6jrm.info (breaking news for radio amateurs).
http://www.arrl.org.
http://www.arrl.org/audio-news (updated every Friday).
https://arnewsline.org (script and audio available every Friday).

Other sites of interest:

http://hawaiisciencedigest.com (science and technology news for radio amateurs).
https://hawaiiintelligencedigest.com (trends in geopolitical intelligence and cybersecurity).

Be sure to check the blog sidebars for more antenna and propagation articles.

Opinions expressed in this blog are mine unless otherwise stated.

Thanks for joining us today.

Aloha es 73 de Russ (KH6JRM)

Friday, June 2, 2017

2014 Field Day - Free Standing Painter Pole Fan Dipole with W4EDF. Post #1149.


If you can;t view this video, please insert this title URL into your browser search box: https://www.youtube.com/watch?v=yM6RGiFkdMM.

Here's an interesting multiband HF antenna for Field Day from Edward Bradshaw (W4EDF).  Ed says "free standing" means he isn't using nearby trees to support his portable mast.  Watch Ed as he demonstrates how to assemble and deploy this free standing painter pole fan dipole by himself.  Ed discusses the materials, wire, knots, poles, and guying techniques used in making this antenna.

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

http://www.HawaiiARRL.info.
https://oahuarrlnews.wordpress.com.
https://bigislandarrlnews.wordpress.com.
http://www.kh6jrm.info (breaking news for radio amateurs).
http://www.arrl.org.
http://www.arrl.org/audio-news (issued each Friday).

Other sites of interest:

http://hawaiisciencedigest.com (science and technology news for radio amateurs).
https://hawaiiintelligencedigest.com (trends in geopolitical intelligence and cybersecurity).

Opinions expressed in this blog are mine unless otherwise stated.

Thanks for joining us today.

Aloha es 73 de Russ (KH6JRM)

Thursday, June 1, 2017

40 Meter Full Wave Loop. Post #1148.


40 Meter Full Wave Loop
(http://www.dxzone.com/cgi-bin/dir/jump2.cgi?ID=29255).
Accessed on 01 June 2017, 19:10 hrs, UTC.
Author:  Greg Lane (N4KGL) of Panama City, Florida.
Please click title or enter title URL into your browser to read the full article.

Comment:

With propagation favoring the lower HF bands this year (160, 80, and 40 meters), you may want a dedicated antenna for those bands, especially 40 meters where daytime and evening time remain fairly good.

In this article, Greg Lane (N4KGL) describes a 40 meter full wave loop he used for his 2013 ARRL Field Day effort in Florida.  His antenna is a diamond-shaped loop using three, 31-foot/9.451 meters Jackite fiberglass poles and his truck to support the structure.  Each loop element was cut for the lower portion of the 40 meter band and measured 36-feet/10.975 meters, for a total length of 144-feet/43.902 meters.

Here are some of the antenna details:

 I considered feeding it with balanced line but decided to use a 4 to 1 balun at the top of the mast. With this choice I did not get a 1 to 1 SWR but it has a good dip at 40 and the harmonics 20, 15 and 10 meters. For most of it, I could go without a tuner. The rest is easy range of the KX3 internal tuner. I cut it long of course and it was low in frequency. After three trims and much sweat it is just where I want it. The whole thing did fit in my front yard. I had one support at 20 instead of 31 feet because it was getting close to the power line drop for the house. I found the trimming for SWR very sane and was better than my experience with a 40 meter off center fed dipole I used last year.


Greg supplies helpful photos to get you started on this remarkably simple and effective 40 meter antenna. Greg adds that the antenna does fairly well on both the 20 and 15 meter bands.

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

http://HawaiiARRL.info.
https://oahuarrlnews.wordpress.com.
https://bigislandarrlnews.wordpress.com.
http://www.kh6jrm.info (breaking news for radio amateurs).
http://www.arrl.org.
http://www.arrl.org/audio-news (posted each Friday).

Other sites of interest:

http://hawaiisciencedigest.com (science and technology news fro radio amateurs).
https://hawaiiintelligencedigest.com (trends in geopolitical intelligence and cybersecurity).

Be sure to check the blog sidebars for more antenna and propagation articles.

Opinions expressed in this blog are mine unless otherwise stated.

Thanks for joining us today.

Aloha es 73 de Russ (KH6JRM)