Monday, December 31, 2018

MicroVert 40M antenna - home made. Post 1728.

https://www.youtube.com/watch?v=gpRv6LqKlbw
If you can't see the video, please insert this title URL into your browser search box: https://www.youtube.com/watch?v=gpRv6LqKlbw

Thanks to OM0ET for this fascinating video.  Here's a simple, low cost, and easy to build vertical antenna suitable for both home use and portable operations. The MicroVert is based on a design developed by Jurgen Schafer (DL7PE).  As built, the MicroVert is a short, base-loaded antenna that uses the coax shield as a counterpoise.  While the Microvert doesn't perform as well as a dipole antenna, it can get you on the air where large antennas are not suitable or allowed. A MicroVert calculator can be found here:  https://lowreal.net/2013/microvert/.

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

http://www.HawaiiARRL.info.
http://www.arrl.org.
http://www.arrl.org/arrl-audio-news (a weekly podcast which is updated each Friday afternoon).
https://oahuarrlnews.wordpress.com.
https://hamradiohawaii.wordpress.com.
https://bigislandarrlnews.com.
https://www.eham.net.
http://www.southgatearc.org.

Thanks for joining us during the past year.  I've enjoyed your comments and suggestions.  Hopefully, 2019 will be better for all of us.

Aloha es 73 de Russ (KH6JRM).

Sunday, December 30, 2018

20m Indoor Antenna. Post 1727.

20m Indoor Antenna

If you can't see the video, please insert this URL tile into your browser search box: https://www.youtube.com/watch?v=PfW3u9YJuhM.

Here's an ultra simple 20 meter vertical antenna that can get you on the air without violating the deed-restrictions of HOAs and CC&Rs.  The antenna consists of a wire, a simple counterpoise, a telescoping fiberglass fishing rod, and a clamp.  According to the maker of this antenna, results with a qrp rig (such as a Yaesu 817) were excellent.  This antenna could also be mounted on the railing enclosing your patio for better performance.  A nice, easy antenna solution for those who can't erect outdoor antennas because of space or deed restrictions.

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

http://www.HawaiiARRL.info.
http://www.arrl.org.
http://www.arrl.org/arrl-audio-news ( a weekly podcast which is updated each Friday afternoon ).
https://oahuarrlnews.wordpress.com.
https://hamradiohawaii.com.
https://bigislandarrlnews.com.
https://www.eham.net.
http://www.southgatearc.org.

Thanks for joining us today.

Aloha es 73 de Russ (KH6JRM).

Saturday, December 29, 2018

Ep. #355 Homemade 20 Meter Ham Radio Antenna. Post 1726.


If you can't see the video, please insert this title URL into your browser search box: https://www.youtube.com/watch?v=bSCsy0kD4J4.

As this video shows, you don't have to spend a lot of money to build a simple, effective antenna for the 20 meter band.  This radio amateur and his father worked together to design, build, install, and use a basic antenna made from locally available resources for  access to the popular 20 meter ham band.  Similar construction techniques can be used for any HF amateur radio band.  This antenna is suitable for both home and portable operations. 

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

http://www.HawaiiARRL.info.
http://www.arrl.org.
http://www.arrl.org/arrl-audio-news (a weekly podcast which is updated each Friday afternoon).
https://oahuarrlnews.wordpress.com.
https://hamradiohawaii.wordpress.com.
https://bigislandarrlnews.com.
https://www.eham.net.
http://www.southgatearc.org.

Thanks for joining us today.

Aloha es 73 de Russ (KH6JRM).

Friday, December 28, 2018

Magnetic loop antenna for 160-40 meters 1KW. Post 1728.


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

Here's a nice antenna project for those radio amateurs living in deed restricted properties (HOAs/CC&Rs).  Woody (N4MQ) takes us step-by-step through the design, construction, adjustment, and use of this magnetic loop antenna that covers all amateur/ham radio bands from 160 meters to 40 meters.  The heart of the antenna system is a pair of 45,000 volt vacuum capacitors tuning a 12-foot/3.658 meters diameter loop, showing construction of the capacitor tuning cabinet.  Be careful with this project.  Potentially lethal voltages are involved.

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

http://www.HawaiiARRL.info.
http://www.arrl.org.
http://www.arrl.org/arrl-audio-news (a weekly podcast which is updated each Friday afternoon).
https://oahuarrlnews.wordpress.com.
https://hamradiohawaii.wordpress.com.
https://bigislandarrlnews.com.
https://www.eham.net.
http://www.southgatearc.org.

Thanks for joining us today.

Aloha es 73 de Russ (KH6JRM).

Thursday, December 27, 2018

Random Wire Antenna Essentials. Post 1724.


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

A properly designed and installed random wire antenna can deliver excellent performance.  In this video, Stan Gibilisco (W1GV) discusses some important things to remember when you design, build, install, and adjust an end-fed random length wire antenna.  A good review for any radio amateur.

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

http://www.HawaiiARRL.info.
http://www.arrl.org.
http://www.arrl.org/arrl-audio-news ( a weekly podcast which is updated each Friday afternoon ).
https://oahuarrlnews.wordpress.com.
https://hamradiohawaii.wordpress.com.
https://bigislandarrlnews.com.
https://www.eham.net.
http://www.southgatearc.org.

Thanks for joining us today.

Aloha es 73 de Russ (KH6JRM).

Wednesday, December 26, 2018

Building a 1 foot junk box magnetic loop final design and on-air test. Post 1723.


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

Here's part two of Kevin Loughin's (KB9RLW) mini magnetic loop antenna.  In part one, we did some preliminary design work and began basic construction.  In part 2, Kevin finalizes his design and begins on-air testing.  Does this small loop antenna really work?  Here's Kevin's answer:

"After much experimentation I'm finally done with the mini magnetic loop. Built from scrounged junk in my basement, it works surprisingly well. I've made many contacts on it, and using WSPR, it's covered the US with half a watt. Video of the original build here: https://www.youtube.com/watch?v=b9KSD... Video of the custom HV trimmer cap I made for this loop here: https://www.youtube.com/watch?v=PZt7V... And finally, a video of my build of a simple field strength meter I use while testing the loop: https://www.youtube.com/watch?v=8Dd0o..."

---------------------------------------
Perhaps you would like to make an antenna similar to Kevin's for portable or emergency use. Kevin provides several useful links to start your own mini mag loop project. Radio amateurs living in deed-restricted properties (HOAs/CC&Rs) will find this project in getting and staying on the air.
---------------------------------------
Aloha es 73 de Russ (KH6JRM).


Tuesday, December 25, 2018

Ham Radio-Building a 1 foot Junk Box Magnetic Loop (experimental). Post 1822.


If you can't see the video, please insert this title URL into your browser search box: https://www.youtube.com/watch?v=b9KSDvjycyw

What once looked like a "boring evening" for Kevin Loughin (KB9RLW) turned out to be most productive in terms of building a new experimental HF magnetic loop antenna.  Kevin wondered if a very small (1-foot/0.3048 meter) magnetic loop could deliver enough performance to qualify as a useful antenna.  Although Kevin admits that the loop wasn't very efficient, it did work and served as a model for a much improved loop antenna later on. Kevin featured that antenna in this youtube video:  https://www.youtube.com/watch?v=ZtsYRyEkCkQ.  The message from this little project is clear:  don't be afraid to experiment with your antennas.  You may succeed beyond expectations.  Besides, antennas are fun to build, especially when you spend very little money to make them. 

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

http://www.HawaiiARRL.info.
http://www.arrl.org.
http://www.arrl.org/arrl-audio-news (a weekly podcast which is updated each Friday afternoon).
https://oahuarrlnews.wordpress.com.
https://hamradiohawaii.wordpress.com.
https://bigislandarrlnews.com.
https://www.eham.net.
http://www.southgatearc.org.

Thanks for joining us today.

Aloha and happy holidays to all!  Russ (KH6JRM).

Monday, December 24, 2018

HF Ham Radio Random Wire Portable Antenna Backyard. Post 1721.


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

Here's a simple random length wire antenna that you can use at home, in the field, or for emergency operations.  Just follow the step-by-step procedure shown by Larry (WD0AKX), and you'll be on the air in a matter of minutes.  Larry's operation consists of a random length of wire, an antenna transmatch (i.e. "tuner"), a unun, and a basic counterpoise.  Larry's QRP rig is the excellent Elecraft KX3, which seems perfect for this informal antenna system.  Check this link for information on determining the best length for your random wire antenna:  http://udel.edu/~mm/ham/radioWire/.

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

http://www.HawaiiARRL.info.
http://www.arrl.org.
http://www.arrl.org/arrl-audio-news (a weekly podcast which is updated each Friday afternoon).
https://oahuarrlnews.wordpress.com.
https://hamradiohawaii.wordpress.com.
https://bigislandarrlnews.com.
https://www.eham.net.
http://www.southgatearc.org.

Thanks for joining us today.  Happy Holidays to you and your family from my shack to yours.

Aloha es 73 de Russ (KH6JRM).

Sunday, December 23, 2018

How To Install A NMO Ham Radio Mobile Antenna Mount. Post 1720.


If you can't see the video, please insert this title URL into your browser search box: https://www.youtube.com/watch?v=7gFNeW2Z1Xo

I've always been a bit over cautious when I use VHF/UHF antennas on my Honda van.  I really don't want to drill holes in the roof and disturb any cables or computers that monitor the performance of my van.  So, I tend to use magnetic mount VHF/UHF antennas--not the best solution, since these antennas tend to scratch metal surfaces and ruin the vehicle paint.  Glass-mounted antennas also present certain problems, especially with windows embedded with antennas and other control circuitry.

After I watched this video, I feel a bit more confident about installing a more secure and aesthetically pleasing mobile antenna.  Mel Wagner (WA5UTK) shows us how to install a NMO mobile mount on his 2009 Ford F-150 pickup truck.  He takes his time and proceeds carefully through each step of the installation process. 

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

http://www.HawaiiARRL.info.
http://www.arrl.org.
http://www.arrl.org/arrl-audio-news (a weekly podcast which is updated each Friday afternoon).
https://oahuarrlnews.wordpress.com.
https://hamradiohawaii.wordpress.com.
https://www.eham.net.
http://www.southgatearc.org.

Thanks for joining us today.

Aloha es 73 de Russ (KH6JRM).

Saturday, December 22, 2018

Ham Radio 40 meter homebrew ground mounted antenna. Post 1719.


If you can't see the video, please insert this title URL into your browser search box: https://www.youtube.com/watch?v=2qEQN_FV0Pk

Here's an excellent example of a 40 meter vertical antenna that should get plenty of contacts, despite the propagation issues facing most radio amateurs.  K8YIO has done a commendable job of designing and building this simple antenna made from locally available materials. Please note the radial ground system which is necessary for maximum efficiency of a vertical antenna.  This antenna could also be used on the 15 meter band, as a third harmonic of 40 meters.  Multiband operation is possible by using balanced feedline into a suitable tuner.

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

http://www.HawaiiARRL.info.
http://www.arrl.org.
http://www.arrl.org/arrl-audio-news (a weekly podcast which is updated each Friday afternoon).
https://oahuarrlnews.wordpress.com.
https://hamradiohawaii.wordpress.com.
https://bigislandarrlnews.com.
https://www.eham.net.
http://www.southgatearc.org.

Thanks for joining us today.

Aloha es 73 de Russ (KH6JRM).

Friday, December 21, 2018

DIY Ultralight UHF Antenna. Post 1718.


If you can't see the video, please insert this title URL into your browser search box: https://www.youtube.com/watch?v=r1bumy9XnKc

In this video from "SurvivalComms", we learn how to make a simple, ultralight, inexpensive, and broadband UHF antenna.  According to "SurvivalComms", this homemade antenna covers 70 cm through GMRS frequencies.  This easy-to-build, lightweight, and durable UHF antenna would make a great addition to your amateur radio "go kit". 

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

http://www.HawaiiARRL.info.
http://www.arrl.org.
http://www.arrl.org/arrl-audio-news (a weekly podcast which is updated each Friday afternoon).
https://oahuarrlnews.wordpress.com.
https://hamradiohawaii.wordpress.com.
https://bigislandarrlnews.com.
https://www.eham.net.
http://www.southgatearc.org.

Thanks for joining us today.

Aloha es 73 de Russ (KH6JRM).

Thursday, December 20, 2018

HF dipole/wire antenna supports. Post 1717.


If you can't see the video, please insert this title URL into your browser search box: https://www.youtube.com/watch?v=FF5oFwpiYeE

In this well-made video, "SurvivalComms" provides an overview of several wire HF antenna supports as well as a look at look at his own homebrewed antenna support system.  This video should give you some useful ideas for your next antenna deployment.

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

http://www.HawaiiARRL.info.
http://www.arrl.org.
http://www.arrl.org/arrl-audio-news (a weekly podcast which is updated each Friday afternoon).
https://oahuarrlnews.wordpress.com.
https://hamradiohawaii.wordpress.com.
https://bigislandarrlnews.com.
https://www.eham.net.
http://www.southgatearc.org.

Thanks for joining us today.

Aloha es 73 de Russ (KH6JRM).

Wednesday, December 19, 2018

160 Meter Antenna Tour. Post 1716.


If you can't see the video, please insert this title URL into your browser search box: https://www.youtube.com/watch?v=QqTC7gE4TPQ

Here's an example of what can be done for 160 meter coverage if you have sufficient space, time, and resources to tap "The Gentlemen's Band."   N1BUG has done an excellent job of showing the full sweep of this ambitious antenna.  This antenna shows meticulous care in placement, construction, and maintenance. One can always dream.  Even if you can't duplicate N1BUG's antenna, you can find a variety of designs online that could fit into your small urban lot or housing situation. With propagation being what it is these days, you may want to discover what 160 meters can offer.  At the very least, 160 meters makes an excellent "rag chew" spot for local and regional contacts.

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

http://www.HawaiiARRL.info.
http://www.arrl.org.
http://www.arrl.org/arrl-audio-news (a weekly podcast which is updated each Friday afternoon).
https://oahuarrlnews.wordpress.com.
https://hamradiohawaii.wordpress.com.
https://bigislandarrlnews.com.
https://www.eham.net.
http://www.southgatearc.org.

Thanks for joining us today.

Aloha es 73 de Russ (KH6JRM).

Tuesday, December 18, 2018

Attic mounted HF Magnetic Loop Antenna for HOA. Post 1715.


If you can't see the video, please insert this title URL into your browser search box: https://www.youtube.com/watch?v=V9th_JBfMIk

Radio amateurs worldwide are facing more restrictions on their antenna building projects.  Whether it's deed-restricted (HOA/CC&R) properties or the lack of space for erecting full-sized HF antennas, hams are turning to a variety of experimental and unusual antenna systems to transmit their signals.

In this video from Julian (OH8STN), we see how an attic-mounted magnetic loop solved a major antenna issue for Julian's friend and former colleague in Ukraine.

The antenna installation consists of the popular Chameleon F-Loop with the RTRR rotator tuner--all remotely controlled from the ham shack.  Hopefully, this antenna will be the answer to some of your antenna problems.

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

http://www.HawaiiARRL.info.
http://www.arrl.org.
http://www.arrl.org/arrl-audio-news (a weekly podcast which is updated each Friday afternoon).
https://oahuarrlnews.wordpress.com.
https://hamradiohawaii.wordpress.com.
https://bigislandarrlnews.com.
https://www.eham.net.
http://www.southgatearc.org

Thanks for joining us today.

Aloha es 73 de Russ (KH6JRM).

Monday, December 17, 2018

9 Brilliant Ideas To Make Your Own Dummy Load. Post 1714.


9 Brilliant Ideas To Make Your Own Dummy Load

https://www.dxzone.com/9-ideas-to-make-your-own-dummy-load/

Accessed on 17 December 2018, 2253 UTC, Post 1714.

Comment:

A "dummy load" should be required equipment for any ham shack or electrical experimenter's bench.  Simply put, a "dummy load" is an off-air device used to adjust and tune a transceiver.  A "dummy load" is a simulated antenna that permits test transmissions with out radiating rf energy beyond the device.

Here are several "dummy load" projects from our friends at the DX Zone:

A 100 watt dummy load.
A 5400 watt dummy load.
A 50 ohm dummy load.
N5ESE QRP dummy load.
QRP Power Meter and dummy load.
An oil-filled dummy load.
How to build a 130 watt dummy load (excellent video tutorial).

Most of these projects can be built using locally available materials.  Any one of these dummy loads will make for an excellent weekend project.  Have fun and reduce RFI at the same time.  Good luck!

Thanks for joining us today.

Aloha es 73 de Russ (KH6JRM).

Sunday, December 16, 2018

Operating a Manual Antenna Tuner. Post 1713.


If you can't see the video, please insert this title URL into your browser search box: https://www.youtube.com/watch?v=4bHWXtRQYI4

Manual antenna "tuners" (transmatches) are an inexpensive and simple way to match your HF antennas to the impedance of your transceiver.  In this video, Joe Lalumia demonstrates his MFJ-986 manual differential T Tuner and explains how the "tuner" can improve antenna performance by reducing SWR in your antenna system.  Although the video focuses on newly licensed radio amateurs, the suggestions from Joe  will serve as a timely review for all classes of amateur radio operators.  Antenna "tuners" are a key component of random length wires, end-fed half wavelength antennas, and doublet antennas.

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

http://www.HawaiiARRL.info.
http://www.arrl.org/arrl-audio-news (a weekly podcast which is updated each Friday afternoon).
http://www.arrl.org.
https://oahuarrlnews.wordpress.com.
https://hamradiohawaii.wordpress.com.
https://bigislandarrlnews.com.
https://www.eham.net.
http://www.southgatearc.org.

Thanks for joining us today.

Aloha es 73 de Russ (KH6JRM).

Saturday, December 15, 2018

Winter Field Day Ham Radio Field Communications. Post 1712.


If you can't see the video, please insert this title URL into your browser search box: https://www.youtube.com/watch?v=56faixRzO-4

While most radio amateurs are well-acquainted with the challenges of the annual ARRL Field Day in the last days of June, not many of us are prepared to face the rigors and survival conditions presented by winter conditions. 

Julian (OH8STN) is among those who believe hams must be prepared for emergencies in all kinds of weather, including the snowy and freezing conditions of wintertime.

In this well-made video, Julian show us how he prepared for the Winter Field Day, conducted in January 2018.  According to Julian, radio amateurs should be ready for emergency or portable operations at any time, regardless of season.  He feels "deploying in what is easily the worst time of year for many operators around the world..." is needed "to test ourselves, our gear, our communications effectiveness, and our ability to thrive in conditions which probably seem insane for most operators."

Here's the list of equipment Julian brought to the 2018 Winter Field Day:

Yaesu FT-817 ND.
10w QRPVer Amplifier.
Endfed Antenna.
FLDigi running on a notebook.
Nortent Tipi 6 shelter with wood burning stove.

Why not try a "Winter Field Day" next January?  Julian's video contains lots of valuable suggestions for making that day a success...stay warm!

Thanks for joining us today.

Aloha es 73 de Russ (KH6JRM).

Friday, December 14, 2018

Build Your Own L Network Antenna Tuner. Post 1711.


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

A simple L Network antenna transmatch (i.e. "tuner") is a valuable accessory for both your home shack and portable operations.  According to Kevin Loughin (KB9RLW), this low cost "tuner", made from readily available parts, is especially useful for random length wire antennas--the type many radio amateurs use in the field. Kevin's video takes you step-by-step through the design, construction, and use process of this simple, effective "tuner."  Why not make one this weekend and keep it in your emergency "go-kit"?

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

http://www.HawaiiARRL.info.
http://www.arrl.org.
http://www.arrl.org/arrl-audio-news (a weekly podcast which is updated each Friday afternoon).
https://oahuarrlnews.wordpress.com.
https://hamradiohawaii.wordpress.com.
https://bigislandarrlnews.com.
https://www.eham.net.
http://www.southgatearc.org.

Thanks for joining us today.

Aloha es 73 de Russ (KH6JRM).

7 Ideas For Indoor Antennas. Post 1710.


7 Ideas For Indoor Antennas. Post 1710.

https://www.dxzone.com/7-ideas-for-indoor-antennas/

Accessed on 14 December 2018, 1800 UTC, Post 1710.

Please click link or scroll down to read your selections.

Comment:  Indoor antennas can be a simple, inexpensive solution for those radio amateurs living in deed-restricted properties (HOA/CC&Rs) or lacking sufficient space for an outdoor antenna.

In this article from https://www.dxzone.com, we find seven ideas that can be used to design, build, and operate indoor HF antennas. 

Thanks for joining us today.

Aloha es 73 de Russ (KH6JRM).


Thursday, December 13, 2018

Backyard Inverted L Antenna. Post 1709.


If you can't see the video, please insert this title URL into your browser search box: https://www.youtube.com/watch?v=Wq4A9skU3Zs

Another great antenna for stealth operations or for areas with limited space is the classic Inverted L Antenna.  In this video from Craig Sheppard, we see a simple, efficient antenna approximately 58-feet/17.68 meters long and 24-feet/7.31 meters high at the branch supporting the horizontal part of the antenna.  Craig says the Inverted L is tied off between 6-feet/1.82 meters and 7-feet/2.13 meters above ground off the far end of the antenna.  Craig adds that the antenna works very well, with his most recent contact being Reunion Island in the Indian Ocean using the JT65 digital mode.

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

http://www.HawaiiARRL.info.
http://www.arrl.org.
http://www.arrl.org/arrl-audio-news (a weekly podcast which is updated each Friday afternoon).
https://oahuarrrlnews.wordpress.com.
https://hamradiohawaii.wordpress.com.
https://bigislandarrlnews.com.
https://www.eham.net.
http://www.southgatearc.org.

Thanks for joining us today.

Aloha es 73 de Russ (KH6JRM).

Wednesday, December 12, 2018

Antennas for Difficult Situations: Ask Dave Episode 7. Post 1708.


If you can't see the video, please insert this title URL into your browser search box: https://www.youtube.com/watch?v=iKC9zv8XuPs

Another fascinating video tutorial from David Casler (KE0OG).  This time, Dave uses three case studies showing how ingenuity and creativity can be used to make HF antennas work in deed-restricted properties. Dave offers helpful suggestions for those faced with seemingly impossible antenna situations.  Even if you're not limited by space or deed restrictions, you'll find Dave's ideas worth your time. Why not build one of these antennas for emergency purposes?  Remember, a compromise antenna is better than no antenna.

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

http://www.HawaiiARRL.info.
http://www.arrl.org.
http://www.arrl.org/arrl-audio-news (a weekly podcast which is updated each Friday afternoon).
https://oahuarrlnews.wordpress.com.
https://hamradiohawaii.wordpress.com.
https://bigislandarrlnews.com.
https://www.eham.net.
http://www.southgatearc.org.

Thanks for joining us today.

Aloha es 73 de Russ (KH6JRM).

Tuesday, December 11, 2018

The Amazing Doublet Dipole G5RV. Post 1707.


If you can't see the video, please insert this title URL into your browser search box: https://www.youtube.com/watch?v=rvBuzQT8zsc

If you need a simple, multiband HF antenna capable of working all amateur radio bands between 80 and 10 meters, then "The Amazing G5RV Dipole Doublet" described by "AnythingWithWheels" may be what you need.

In this video, we get a complete review of the popular MFJ-1779M doublet antenna.  The antenna uses a balanced feed line, a current balun (1:4), and an antenna transmatch (i.e. "tuner") to achieve multiband HF capability.  If you can erect only one antenna to cover several amateur radio bands, then the "classic" doublet antenna is a satisfactory solution.

I've used this doublet antenna design at my QTH for several years without major problems.  My current arrangement uses 102-feet/31.09 meters of number 14 AWG house wire for the horizontal portion of the dipole, 100-feet/30.48 meters of 450 ohm ladder line to feed the antenna, a 1:4 current balun connected to the balanced feedline, and a short run of RG-8 coaxial cable (10-feet/3.04 meters) leading from the balun to my trusty Drake MN-4 antenna "tuner."  The horizontal portion of the antenna is supported by two 33-feet/10.06 meters long telescoping fiberglass masts.

Try a classic doublet antenna.  You won't be disappointed.

Thanks for joining us today.

Aloha es 73 de Russ (KH6JRM).

Monday, December 10, 2018

Small, effective Antenna Build. Post 1706.


If you can't see the video, please insert this title URL into your browser search box: https://www.youtube.com/watch?v=wIgqnISFs7Y.

Those of us who live or have lived on a small urban lot know how difficult it is to design and build an effective HF antenna.  Space and nosey neighbors become major obstacles in your choice of antennas. 

In this video uploaded by TWiT Netcast Network, George Thomas (W5JDX) talks with Vito Dipinto (VA3VMD) about his small, yet effective dipole antenna. Despite the limitations of Vito's antenna, he manages to make many contacts from his small urban property.  Vito's simple dipole antenna may offer some hope for radio amateurs facing severe space problems.  You can view the full episode at https://twit.tv/hn/316.

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

http://www.HawaiiARRL.info.
http://www.arrl.org.
http://www.arrl.org/arrl-audio-news (a weekly podcast which is updated each Friday afternoon).
https://oahuarrlnews.wordpress.com.
https://hamradiohawaii.wordpress.com.
https://bigislandarrlnews.com.
https://www.eham.net.
http://www.southgatearc.org.

Thanks for joining us today.

Aloha es 73 de Russ (KH6JRM).

Sunday, December 9, 2018

How Do I Get A Better Antenna? Foundation of Amateur Radio Podcast #183. Post 1705.


How Do I Get A Better Antenna? Foundation of Amateur Radio Podcast #183.

https://www.eham.net/articles/42321.

Accessed on 10 December 2018, 0204 UTC, Post 1705.

Author:  Onno (VK6FLAB).

Please click link to read the full script and to access the podcast.

Comment:  Now that you have an amateur/ham radio license, you can focus on the one factor that determines how well your signal reaches others--namely, your antenna.  With all the advertising claims and promotions surrounding antennas,it may be difficult to shift fact from fiction when it comes to selecting the wires that launch your signals.

Onno (VK6FLAB) takes some of the guesswork and confusion out of antenna selection in this well-organized and thoughtful podcast focusing on the selection criteria for your antennas.  Briefly speaking, Onno says there are three important factors which will determine the type of antenna you need:  cost, construction, and performance.  At each stage of this package, there are things you can do to improve what you've made or bought.  For Onno, "The best antenna depends on the questions you ask...Ask better questions, get a better antenna."

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

http://www.HawaiiARRL.info.
http://www.arrl.org.
http://www.arrl.org/arrl-audio-news (a weekly podcast which is updated each Friday afternoon).
https://oahuarrlnews.wordpress.com.
https://hamradiohawaii.wordpress.com.
https://bigislandarrlnews.com.
https://www.eham.net.
http://www.southgatearc.org.

Thanks for joining us today.

Aloha es 73 de Russ (KH6JRM).

Saturday, December 8, 2018

High power 1:1 current balun, coax to ladder line. Post 1704.


If you can't see the video, please insert this title URL into your browser search box: https://www.youtube.com/watch?v=r1PdSZgh8Pk

Here's a gadget that could help protect your HF transceiver and perhaps even improve antenna performance.  Baluns, such as the one introduced in this excellent video, create a high impedance to common mode currents which flow on the outside of a coaxial cable shield.  In this video, the balun consists of 10 turns on two stacked FT-240-31 torroidal cores.  A handy, sturdy, and inexpensive way to make sure equal currents go into each arm of your dipole antenna.

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

http://www.HawaiiARRL.info.
http://www.arrl.org
http://www.arrl.org/arrl-audio-news (a weekly podcast which is updated each Friday afternoon).
https://oahuarrlnews.wordpress.com.
https://hamradiohawaii.wordpress.com.
https://bigislandarrlnews.com.
https://www.eham.net.
http://www.southgatearc.org.

Thanks for joining us today.

Aloha es 73 de Russ (KH6JRM).

Friday, December 7, 2018

End Fed Half Wave Multiband Antenna. Post 1703.


If you can't see the video, please insert this title URL into your browser search box: https://www.youtube.com/watch?v=N_o0jneBEh0

Thanks to Steve Ellington for this superbly produced tutorial on the modern half wave multiband HF antenna.  Steve presented this topic at the Lawrenceville, Georgia Techfest.  Steve traces the history of this "classic" antenna, discusses its basic theory, and offers suggested design and construction tips.  Well-done, informative, and easy-to-understand presentation.

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

http://www.HawaiiARRL.info.
http://www.arrl.org.
http://www.arrl.org/arrl-audio-news (a weekly podcast which is updated each Friday afternoon).
https://oahuarrlnews.wordpress.com.
https://hamradiohawaii.wordpress.com.
https://bigislandarrlnews.com.
https://www.eham.net.
http://www.southgatearc.org.

Thanks for joining us today.

Aloha es 73 de Russ (KH6JRM).

Thursday, December 6, 2018

Ham Radio Field Day-Rain and a very tall vertical. Post 1702.


If you can't see the video, please insert this title URL into your browser search box: https://www.youtube.com/watch?v=9iW5h2JDHRA

Although the ARRL Field Day Communications Exercise is set for the last full weekend in June, it's not too early to think about your portable station for this annual event. 

In this video, Tracy ("Outdoors On The Air") shows us his Field Day station, complete with a 50-ft/15.24 meters vertical.  Field Day always brings the unexpected, such as foul weather, insect pests, and power issues.  In this video, Tracy comes prepared for the elements and manages some excellent contacts with his QRP (low power) set up.  A nicely done video from a fellow ham who enjoys both the outdoors and amateur radio.  Prepare now for this interesting and often challenging communications event.

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

http://www.HawaiiARRL.info.
http://www.arrl.org.
http://www.arrl.org/arrl-audio-news (a weekly podcast which is updated each Friday afternoon).
https://oahuarrlnews.wordpress.com.
https://hamradiohawaii.wordpress.com.
https://bigislandarrlnews.com.
https://www.eham.net
http://www.southgatearc.org.

Thanks for joining us today.

Aloha es 73 de Russ (KH6JRM).

Wednesday, December 5, 2018

Dipole, EFHW, Vertical, Windom Antenna Comparison. Post 1701.


If you can't see the video, please insert this title URL into your browser search box: https://www.youtube.com/watch?v=OCz16I0xlCo.

Thanks to Jonathan Charles and his fellow radio amateurs for conducting this "Field Test" of four popular HF antennas, including the classic dipole, End Fed Halfwave (EFHW), the Vertical, and the popular Windom antenna.  This video gives you an excellent idea of what these antennas can do under portable or emergency operations.  Of course, each antenna has its strengths and weaknesses. The thing to remember is to make the best antenna you can with the materials available.

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

http://www.HawaiiARRL.info.
http://www.arrl.org.
http://www.arrl.org/arrl-audio-news (a weekly podcast which is updated each Friday afternoon).
https://oahuarrlnews.wordpress.com.
https://hamradiohawaii.wordpress.com.
https://bigislandarrlnews.com.
https://www.eham.net.
http://www.southgatearc.org.

Thanks for joining us today.

Aloha es 73 de Russ (KH6JRM).

Tuesday, December 4, 2018

Free Azimuthal Maps. Post 1700.

Free Azimuthal Maps. Post 1700.

https://ns6t.net/azimuth/azimuth.html

Author:  NS6T.

Accessed on 04 December 2018, 2321 UTC, Post 1700.

Please click link to down load the complete article.

Comment:  NS6T is offering a free azimuthal map for the asking.  The links will take you to a simple form which will help generate an azimuthal map from your location.  The map is easy to make and will help you aim your beams and other directional antennas.  This is a great aid for contesters and DX-Expedition followers.

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

http://www.HawaiiARRL.info.
http://www.arrl.org.
http://www.arrl.org/arrl-audio-news (a weekly podcast which is updated each Friday afternoon).
https://oahuarrlnews.wordpress.com
https://hamradiohawaii.wordpress.com.
https://bigislandarrlnews.com.
https://www.eham.net.
http://www.southgatearc.org.

Thanks for joining us today.

Aloha es 73 de Russ (KH6JRM).

Monday, December 3, 2018

How To Build A Delta Loop Antenna. Post 1699.


If you can't see the video, please insert this title URL into your browser search box: https://www.youtube.com/watch/v=1uUVMaRFMv4.

One of my favorite HF antennas is the classic delta loop.  You can feed the antenna with 50 ohm coaxial cable for single band use or connect the antenna to an antenna transmatch (i.e. "tuner") with balanced feeders for multiband HF operation.

In this video, Hiram Vazquez does an excellent job of explaining the theory, design, construction, and use of the delta loop antenna.  The delta loop has some gain, receives well, takes up little space, and is fairly cheap to make.  You can mount the delta loop horizontally, vertically, or in a sloper configuration.

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

http://www.HawaiiARRL.info.
http://www.arrl.org.
http://www.arrl.org/arrl-audio-news (a weekly podcast which is updated each Friday afternoon).
https://oahuarrlnews.wordpress.com.
https://hamradiohawaii.wordpress.com.
https://bigislandarrlnews.com.
https://www,eham.net.
http://www.southgatearc.org.

Thanks for joining us today.

Aloha es 73 de Russ (KH6JRM).

Sunday, December 2, 2018

HyEndFed 3 Band + Spiderbeam 12m pole. Post 1698.


If you can't see the video, please insert this title URL into your browser search box: https://www.youtube.com/watch?v=P6rsOOvUEuo

In this video from Tracy ("Outdoors On The Air"), we see any easy enhancement of the popular HyEndFed 3 Band HF antenna by using a 12 meter/39.36-foot Spiderbeam Pole.  This combination makes it easy to erect a vertical antenna for portable, field, or emergency situations.

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

http://www.HawaiiARRL.info.
http://www.arrl.org.
http://www.arrl.org/arrl-audio-news (a weekly podcast which is updated each Friday afternoon).
https://oahuarrlnews.wordpress.com.
https://hamradiohawaii.wordpress.com.
https://bigislandarrlnews.com.
https://www.eham.net.
http://www.southgatearc.org.

Thanks for joining us today.

Aloha es 73 de Russ (KH6JRM).

Saturday, December 1, 2018

Wire Antennas for Ham Radio. Post 1697.


Wire Antennas for Ham Radio. Post 1697.

Source:
https://www.qsl.net/va3iul/Antenna/Wire%20Antennas%20for%20Ham%20Radio/Wire_antennas_for_ham_radio.htm

Author:  Iulian Rosu (YO3 DAC/VA3IUL).

Please click link to read the complete article.

Comment:  If you're "stumped" for new antennas for your ham radio station, check out the 368 varieties suggested by Iulian Rosu.  Building and using these wire antennas will keep you busy for more than a year. Iulian provides a detailed graphic of each antenna, complete with measurements and other helpful data.  I've tried several of Iulian's designs with great success, even in this time of disappointing propagation. Why not try a few of these antennas--you may be pleasantly surprised by the results.

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

http://www.HawaiiARRL.info.
http://www.arrl.org.
http://www.arrl.org/arrl-audio-news (a weekly podcast which is updated each Friday afternoon).
https://oahuarrlnews.wordpress.com.
https://hamradiohawaii.wordpress.com.
https://bigislandarrlnews.com.
https://www.eham.net.
http://www.southgatearc.org.

Thanks for joining us today.

Aloha es 73 de Russ (KH6JRM).

Friday, November 30, 2018

Counterpoise (ground system)-Video-Learning-WizScience. Post 1696.


If you can't see the video, please insert this title URL into your browser search box: https://www.youtube.com/watch?v=n5hKql_NGaQ

This video from WizScience does an excellent job of explaining the theory, design, and operation of a counterpoise system for antennas.  If you have rocky or high resistance soil in your neighborhood, a counterpoise may be necessary to provide a proper ground for your station.

According to the video a counterpoise is "a network of suspended wires or cables used as a substitute for an earth connection in a radio antenna system...it is used with a radio transmitter or receiver when a normal earth ground cannot be use because of high soil resistance or other reasons."

Try an elevated counterpoise system for your HF antenna.  You may be surprised how much it improves the performance of your antenna.

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

http://www.HawaiiARRL.info.
http://www.arrl.org.
http://www.arrl.org/arrl-audio-news (a weekly podcast which is updated each Friday afternoon).
https://oahuarrlnews.wordpress.com.
https://hamradiohawaii.wordpress.com.
https://bigislandarrlnews.com.
https://www.eham.net.
http://www.southgatearc.org.

Thanks for joining us today.

Aloha es 73 de Russ (KH6JRM).

Thursday, November 29, 2018

RF Ground and Ground Planes-Ham Radio Q and A. Post 1695.


If you can't see the video, please insert this title URL into your browser search box: https://www.youtube.com/watch?v=paoYN2auGEU

An uncomplicated, straight forward explanation of RF Ground and Ground Planes from KB9VBR Antennas.  According to KB9VBR, "The purpose of the RF Ground is to act as a reflector.  It doesn't radiate RF energy, but instead interacts with the antenna radiating element by mirroring and reflecting that energy, creating a predictable RF radiation pattern..."

A good, basic discussion that can be used at club meetings or for instructional purposes for those seeking an amateur radio license.

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

http://www.HawaiiARRL.info.
http://www.arrl.org.
http://www.arrl.org/arrl-audio-news ( a weekly podcast which is updated every Friday afternoon).
https://oahuarrlnews.wordpress.com.
https://hamradiohawaii.wordpress.com.
https://bigislandarrlnews.com.
https://www.eham.net.
http://www.southgatearc.org.

Thanks for joining us today.

Aloha es 73 de Russ (KH6JRM).

Wednesday, November 28, 2018

The Original Ed Fong Dual Band VHF/UHF 70cm/2m J-pole antenna. Post 1694.


If you can't see the video, please insert this title URL into your browser search box: https://www.youtube.com/watch?v=PtLEj1f773c

J-Pole antennas for the 2m and 70 cm (VHF/UHF) Amateur Radio bands come in many sizes, ranging from commercial models based on public service  designs to homebrewed configurations using coaxial cable, 450 ohm ladder line, or even TV twin lead.  Supporting structures can be anything from PVC pipe to wood, including temporary lashups affixed to your home, shack, or garage.

In this video, we see a near commercial grade J-Pole antenna based on a design from Silicon Valley engineer Ed Fong.  The fully-encased antenna is lightweight, portable, and adequate for most field and home operations.

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

http://www.HawaiiARRL.info.
http://www.arrl.org.
http://www.arrl.org/arrl-audio-news (a weekly podcast which is updated each Friday afternoon).
https://oahuarrlnews.wordpress.com.
https://hamradiohawaii.wordpress.com.
https://bigislandarrlnews.com.
https://www.eham.net.
http://www.southgatearc.org.

Thanks for joining us today.

Aloha es 73 de Russ (KH6JRM).

Tuesday, November 27, 2018

The simple, coaxial cable emergency prepper antenna. Post 1693.


If you can't see the video, please insert this title URL into your browser search box: https://www.youtube.com/watch?v=tafy51yUzQo

In this exceptionally clear and understandable video, Kevin Loughin (KB9RLWQ) revives a classic antenna that can be made from locally available materials and used for a variety of purposes, ranging from casual portable operations to last-minute emergencies.

This handy 2 meter antenna is easy to build from a piece of 50-ohm coaxial cable; requires only simple tools for construction; and serves as a great "throw-together" antenna for your "go-kit."  Make one of these simple antennas and store it in your vehicle for those unexpected emergencies.

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

http://www.HawaiiARRL.info.
http://www.arrl.org.
http://www.arrl.org/arrl-audio-news (a weekly podcast which is updated each Friday afternoon).
https://oahuarrlnews.wordpress.com.
https://hamradiohawaii.wordpress.com.
https://bigislandarrlnews.com.
https://www.eham.net.
http://www.southgatearc.org.

Thanks for joining us today.

Aloha es 73 de Russ (KH6JRM).

Monday, November 26, 2018

How to make a 4 to 1 balun cheap and easy. Post 1692.


If you can't see the video, please insert this title URL into your browser search box: https://www.youtube.com/watch?v=kwBFPu7wSuE

If you use certain types of Amateur/Ham Radio antennas, such as OCFs (off center fed dipoles) and "longwire" systems, a rugged 4:1 balun will make your antenna more efficient, reduce high SWR, and perhaps protect your rig from serious damage from commode mode currents riding down your coaxial feed line.  This video takes you step-by-step through the design, construction, and use of this important antenna accessory.

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

http://www.HawaiiARRL.info.
http://www.arrl.org.
http://www.arrl.org/arrl-audio-news (a weekly podcast which is updated each Friday afternoon).
https://oahuarrlnews.wordpress.com.
https://hamradiohawaii.wordpress.com.
https://bigislandarrlnews.com.
https://www.eham.net.
http://www.southgatearc.org.

Thanks for joining us today.

Aloha es 73 de Russ (KH6JRM).

Building an Air Choke or "Ugly Balun". Post 1691.


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

This excellent video from Jim Haslett shows you how to build a simple, effective, and inexpensive Air Choke or "Ugly Balun" for your HF antenna.

The purpose of choke balun is to create a high-impedance to common mode currents that would flow on the outside of coaxial cable shielding.  The "ugly balun" will ensure a better radiation pattern for your HF antenna.

Most of the materials for this project can be found at your neighborhood home improvement outlet or from an electrical contractor.

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

http://www.HawaiiARRL.info.
http://www.arrl.org.
http://www.arrl.org/arrl-audio-news (a weekly podcast which is updated each Friday afternoon).
https://oahuarrlnews.wordpress.com.
https://hamradiohawaii.wordpress.com.
https://bigislandarrlnews.com.
https://www.eham.net.
http://www.southgatearc.org.

Thanks for joining us today.

Aloha es 73 de Russ (KH6JRM).

Sunday, November 25, 2018

VLF earth-mode receiving system (latest). Post 1690.


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

Here's a great project for those interested in tapping into the often strange world of Very Low Frequencies (VLF).  G3XBM shows us his latest VLF "earth-mode receiving system" using a simple tuned loop, a single FET impedance converter, an external USB sound card, and an ASUS notebook running Spartan Software.

If you have a few spare hours during the week, why not try this VLF antenna?
The "radio basement" is a fun place to explore.

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

http://www.HawaiiARRL.info.
http://www.arrl.org.
http://www.arrl.org/arrl-audio-news (a weekly podcast which is updated each Friday afternoon).
https://oahuarrlnews.wordpress.com.
https://hamradiohawaii.wordpress.com.
https://bigislandarrlnews.com.
https://www.eham.net.
http://www.southgatearc.org.

Thanks for joining us today.

Aloha es 73 de Russ (KH6JRM).

Saturday, November 24, 2018

Portable HF Antenna. Post 1689.


If you can't see the video, please insert this title URL into your browser search box: https://www.youtube.com/watch?v=vu2jD0qd8Vo

In this video, M.B. Bushcraft show us the antenna he plans to use during a summer SOTA (Summits On The Air) expedition to Mt. Wheeler.  M.B. says it's necessary to pre-test all of your equipment, especially if you're going to operate for several days from a remote location.  His antenna is efficient, well-designed, and uses a good ground radial system.

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

http://www.HawaiiARRL.info.
http://www.arrl.org.
http://www.arrl.org/arrl-audio-news (a weekly podcast which is updated each Friday afternoon).
https://oahuarrlnews.wordpress.com.
https://hamradiohawaii.wordpress.com.
https://bigislandarrlnews.com.
https://www.eham.net.
http://www.southgatearc.org.

Thanks for joining us today.

Aloha es 73 de Russ (KH6JRM).

Friday, November 23, 2018

VE2ZAZ-First EME Radio Contact with HB9Q. Post 1688.


If you can't see the video, please insert this title URL into your browser search box: https://www.youtube.com/watch?v=nfrPwdmmky4.

The thrill of discovery awaits those radio amateurs willing to try something new.  In this video, VE2ZAZ documents his first EME (Moonbounce) contact with HB9Q.  A comparison between the two stations is fascinating.  While HB9Q's station is quite impressive (50-foot/15 meter dish running about 1 kw of power), VE2ZAZ's equipment is much simpler--a 13-element yagi cut for 432 MHz running around 80 watts.  With a little ingenuity, you can get on EME with modest equipment and a stable digital mode such as JT65B. That's the mode HB9Q and VE2ZAZ used in this video. 

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

http://www.HawaiiARRL.info.
http://www.arrl.org.
http://www.arrl.org/arrl-audio-news (a weekly podcast which is updated each Friday afternoon).
https://oahuarrlnews.wordpress.com.
https://hamradiohawaii.wordpress.com.
https://bigislandarrlnews.com.
https://www.eham.net.
http://www.southgatearc.org.

Thanks for joining us today.

Aloha es 73 de Russ (KH6JRM)

Thursday, November 22, 2018

More 14 MHz USA contacts with a half square antenna. Post 1687.


If you can't see the video, please insert this title URL into your browser search box: https://www.youtube.com/watch?v=n_lmzHe40O0.

Australian radio amateur Peter Parker (VK3YE) continues his QRP experiments on a nearby beach.  This time, he uses a half square antenna mounted in the wet sand to establish some excellent contacts with the USA.  A half square antenna is fairly easy to build and it delivers a bit more gain over a 1/2 wave horizontal dipole antenna.

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

http://www.HawaiiARRL.info.
http://www.arrl.org.
http://www.arrl.org/arrl-audio-news (a weekly podcast which is updated each Friday afternoon).
https://oahuarrlnews.wordpress.com.
https://hamradiohawaii.wordpress.com.
https://bigislandarrlnews.com.
https://www.eham.net.
http://www.southgatearc.org.

Thanks for joining us today.

Aloha es 73 de Russ (KH6JRM).

Wednesday, November 21, 2018

Ham Radio-A quarter wave ground plane antenna for your HT. Post 1686.


If you can't see the video, please insert this title URL into your browser search box: https://www.youtube.com/watch?v=ViodMxV77eM.

There are many ways to improve the performance of your VHF/UHF HT.  One of the most effective ways to boost HT performance is to improve the antenna system used with the transceiver.  Most stock "rubber duck" antennas supplied with HTs leave a lot to be desired.

In this video from Kevin Loughin (KB9RLW), we see how a simple ground plane antenna can significantly improve the range and performance of your HT. Although there are other methods to improve HT performance (including the addition of a "rat tail" wire to the antenna input), Kevin believes a well-designed quarter wave ground plane to be "the best performing addition you could put on your HT...not that convenient, but it could have its uses."  Use Kevin's design and see if the performance of your HT improves.

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

http://www.HawaiiARRL.info.
http://www.arrl.org.
http://www.arrl.org/arrl-audio-news (a weekly podcast which is updated each Friday afternoon).
https://oahuarrlnews.wordpress.com.
https://hamradiohawaii.wordpress.com.
https://bigislandarrlnews.com.
https://www.eham.net.
http://www.southgatearc.org.

Thanks for joining us today.

Aloha es 73 de Russ (KH6JRM).

Random Wire Antennas. Post 1685.


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

A random wire antenna can perform reasonably well if you take a few precautions.  In this video, Stan Gibilisco (W1GV) outlines some important things to consider when you design, install, and use end-fed random wire antennas.  A good, general introduction to random wire antennas for the HF Amateur/Ham Radio bands.

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

http://www.HawaiiARRL.info.
http://www.arrl.org.
http://www.arrl.org/arrl-audio-news (a weekly podcast which is updated each Friday afternoon).
https://oahuarrlnews.wordpress.com.
https://hamradiohawaii.wordpress.com.
https://bigislandarrlnews.com.
https://www.eham.net.
http://www.southgatearc.org.

Thanks for joining us today.

Aloha es 73 de Russ (KH6JRM).

Tuesday, November 20, 2018

CommsToGo Radio And Backpack Antenna. Post 1684.


If you can't see the video, please insert this title URL into your browser search box: https://www.youtube.com/watch?v=IEidACZ1Ebc

Are you prepared for emergency communications?  Or do you have a portable radio/antenna system you can use for portable use?  If you don't have such a system, you may want to consider the field-capable radio/antenna project used by John Jacobs (NY2MC).  His "CommsToGo Radio And Backpack Antenna" seems ideally suited for portable or emergency use.  In this video, John demonstrates the components of his system, including how to launch the antenna into nearby trees.  This system would make a reliable and simple "Go-Kit" for local emergencies, Field Days, or for just casual operating at the nearest public park.

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

http://www.HawaiiARRL.info.
http://www.arrl.org.
http://www.arrl.org/arrl-audio-news (a weekly podcast which is updated each Friday afternoon).
https://oahuarrlnews.wordpress.com.
https://hamradiohawaii.wordpress.com.
https://bigislandarrlnews.com.
https://www.eham.net.
http://www.southgatearc.org.

Thanks for joining us today.

Aloha es 73 de Russ (KH6JRM).

Monday, November 19, 2018

2 element wire yagi for 28 MHz. Post 1623.


If you can't see the video, please insert this title URL into your browser search box: https://www.youtube.com/watch?v=8bS1QBH8VwQ.

A homebrew yagi is a simple, inexpensive way to build a gain antenna for the upper HF Amateur/Ham Radio bands. In this video, Peter Parker (VK3YE) takes us step-by-step through the design, construction, and use of a simple 2 element wire yagi antenna for the 10 meter band (28 MHz).   Peter's antenna is based on an original design from VE7CA, who published his findings in the November 2001 edition of "QST."  You can scale this antenna for any HF band, depending on the space and resources available.  This would make an excellent club project for the next ARRL Field Day or for any portable operation.

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

http://www.HawaiiARRL.info.
http://www.arrl.org.
http://www.arrl.org/arrl-audio-news (a weekly podcast which is updated each Friday afternoon).
https://oahuarrlnews.wordpress.com.
https://hamradiohawaii.wordpress.com.
https://bigislandarrlnews.com.
https://www.eham.net.
http://www.southgatearc.org.

Thanks for joining us today.

Aloha es 73 de Russ (KH6JRM).

Sunday, November 18, 2018

Vertical Delta Loop Antenna. Post 1682.


If you can't see the video, please insert this title URL into your browser search box: https://www.youtube.com/watch?v=MMjmccZ8VLg.

An exceptionally well-produced video from Serhat Sertakan (TA1O).  Even though the video is presented in Turkish, you don't have to know the language to figure out how to build this HF antenna covering the 14-18-21-28 MHz Amateur/Ham Radio bands.  The antenna appears sturdy, portable, and easy to erect and take down.

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

http://www.HawaiiARRL.info.
http://www.arrl.org.
http://www.arrl.org/arrl-audio-news (a weekly podcast which is updated each Friday afternoon).
https://oahuarrlnews.wordpress.com.
https://hamradiohawaii.wordpress.com.
https://bigislandarrlnews.com.
https://www.eham.net.
http://www.southgatearc.org.

Thanks for joining us today.

Aloha es 73 de Russ (KH6JRM).

Saturday, November 17, 2018

70cm DIY Quad Antenna Build. Post 1631.


If you can't see the video, please insert this title URL into your browser search box: https://www.youtube.com/watch?v=CR8ap-h1GY4.

In this exceptionally well-made video tutorial, Julien (OH8STN) takes us step-by-step through the design, construction, testing, and use of a one or three element quad antenna for UHF (70cm).  The construction is straightforward and should not present any problems as you complete this useful antenna for your shack or portable use.

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

http://www.HawaiiARRL.info.
http://www.arrl.org.
http://www.arrl.org/arrl-audio-news (a weekly podcast which is updated each Friday afternoon).
https://oahuarrlnews.wordpress.com.
https://hamradiohawaii.wordpress.com.
https://bigislandarrlnews.wordpress.com.
https://www.eham.net.
http://www.southgatearc.org.

Thanks for joining us today.

Aloha es 73 de Russ (KH6JRM).

Friday, November 16, 2018

472 kHz WSPR TX/RX with earth electrodes. Post 1680.


If you can't see the video, please insert this title URL into your browser search box: https://www.youtube.com/watch?v=m_2WMbDjoAw.

Antennas for the 630 meter amateur radio band (472 kHz-479 kHz) can be large and difficult to fit into an urban lot.  Would you be willing to use this band if a "reasonably small antenna" could be designed and built for this band?

Roger (G3XBM) has been doing experiments with "earth electrodes" at his QTH--his results have been impressive for the small amount of power he's using (around 10mW).  According to Roger, his antenna system consists of 2 ground rods placed 20 meters/65.6 feet apart, with the ground connected to the PA by a wire running about 1.5 meters/4.92 feet above ground along a fence.  Despite the constraints and limited size of this "earth electrode" antenna, the system seems to work, even at low power levels.  A fascinating idea worth trying.

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

http://www.HawaiiARRL.info.
http://www.arrl.org.
http://www.arrl.org/arrl-audio-news (a weekly podcast which is updated each Friday afternoon).
https://oahuarrlnews.wordpress.com.
https://hamradiohawaii.wordpress.com.
https://bigislandarrlnews.com.
https://www.eham.net.
http://www.southgatearc.org.

Thanks for joining us today.

Aloha es 73 de Russ (KH6JRM)

Thursday, November 15, 2018

What is a loading coil? Post 1679.


If you can't see the video, please insert this title URL into your browser search box: https://www.youtube.com/watch?v=LF8-UrXqUVA.

Carl Oliver has done an excellent job of explaining what a coil is and how it's used to reduce the physical length of a resonant antenna. Carl's explanation is simple, accurate, hands on, and to the point.  This video belongs in your amateur radio reference library.

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

http://www.HawaiiARRL.info.
http://www.arrl.org.
http://www.arrl.org/arrl-audio-news (a weekly podcast which is updated each Friday afternoon).
https://oahuarrlnews.wordpress.com.
https://hamradiohawaii.wordpress.com.
https://bigislandarrlnews.com.
https://www.eham.net.
http://www.southgatearc.org.

Thanks for joining us today.

Aloha es 73 de Russ (KH6JRM).

Wednesday, November 14, 2018

Multiband HF portable antenna, the easy way. Post 1678.


If you can't see the video, please insert this title URL into your browser search box: https://www.youtube.com/watch?v=ofmUK8o7Jxg.

Here's a simple, inexpensive, and totally portable HF vertical antenna suitable for field and emergency use.  AC2TJ has done an excellent job of creating a "vertical helix" antenna capable of covering 80 through 10 meters with an antenna "tuner".  A tripod, a flexible 20-foot/6.09 meters telescoping fiberglass mast, some antenna wire, and a simple ground radial or counterpoise system wraps up the portable package. 

I've used similar spirally-wrapped antennas for several years with excellent results.  The key is to wrap about a 1/2 wavelength of wire for your chosen frequency along the full length of the fiberglass mast.  The wrapped 1/2 wavelength wire behaves like a 1/4 wavelength vertical.  Be sure to add a few 1/4 wavelength ground radials for your lowest chosen frequency to improve the efficiency of the antenna.  An antenna transmatch (i.e. "tuner") is needed to cover the full range between 80 meters and 10 meters.

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

http://www.HawaiiARRL.info.
http://www.arrl.org.
http://www.arrl.org/arrl-audio-news (a weekly podcast which is update each Friday afternoon).
https://oahuarrlnews.wordpress.com.
https://hamradiohawaii.wordpress.com.
https://bigislandarrlnews.com.
https://www.eham.net.
http://www.southgatearc.org.

Thanks for joining us today.

Aloha es 73 de Russ (KH6JRM).

Tuesday, November 13, 2018

Building a Doublet Aerial-Antenna. Post 1677.


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

I've always enjoyed "classic" antennas for their simplicity, efficiency, and low cost.  One of my favorites is the HF Doublet, which can be designed to cover all amateur radio frequencies between 3.500 MHz (80 meters) and 29.000 MHz (10 meters). 

In this enjoyable and detailed presentation, Adrian documents his construction of a doublet HF antenna from start to finish.  By using an antenna transmatch (i.e. "tuner"), a 1:4 current balun, and twin feeders (ladder line, tv window line, or homebrewed 600 ohm feed line), you can use Adrian's creation to cover several amateur HF radio bands--all this with one antenna.  Give this "old timer" antenna a try--you won't be disappointed.

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

http://www.HawaiiARRL.info.
http://www.arrl.org.
http://www.arrl.org/arrl-audio-news (a weekly podcast which is updated each Friday afternoon).
https://oahuarrlnews.wordpress.com.
https://hamradiohawaii.wordpress.com.
https://bigislandarrlnews.com.
https://www.eham.net.
http://www.southgatearc.org.

Thanks for joining us today.

Aloha es73 de Russ (KH6JRM).

Monday, November 12, 2018

How To Tune a 10 Meter Dipole. Post #1676.


If you can't view the video, please insert this title URL into your browser search box: https://www.youtube.com/watch?v=Ogxp3yjAzCs&index=110&list=PLKKNqDVcbnzV-vN-gtGhODMTAkmnUDBX0&t=0s.

Randy Hall (K7AGE) does an excellent job of describing how to "tune" a 10 meter dipole antenna. Although the video will prove most useful for newly licensed radio amateurs, the information will serve as a general review for all hams who wish to design, build, and use simple dipole antennas.  The length of this dipole is 468/frequency in MHz.  The antenna is cut for 28.3 MHz and measures 16.5 feet/5.03 meters long.  Randy shows us how to use a MFJ Antenna Analyzer to trim the antenna to resonance.  The procedure outlined by Randy can be used for any HF band from 160 meters to 10 meters.

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

http://www.HawaiiARRL.info.
http://www.arrl.org.
http://www.arrl.org/arrl-audio-news (a weekly podcast which is updated each Friday afternoon).
https://oahuarrlnews.wordpress.com.
https://hamradiohawaii.wordpress.com.
https://bigislandarrlnews.com.
https://www.eham.net.
http://www.southgatearc.org.

Thanks for joining us today.

Aloha es 73 de Russ (KH6JRM).

Sunday, November 11, 2018

My favourite magnetic loop for HF Pedestrian Mobile. Post 1675.


If you can't view the video, please insert this title URL into your browser search box: https://www.youtube.com/watch?v=YswnVmAKSP0.

Australian radio amateur Peter Parker (VK3YE) enjoys experimenting with antennas.  He especially likes to design antennas for portable operations, including what he calls "Pedestrian Mobile." 

In this video, Peter compares two magnetic loop antennas for the "Pedestrian Mobile" situation--one being made from copper tubing and the other fashioned from aluminum tubing.  According to Peter, both magnetic loop antennas performed well on the 40 meter Amateur Radio Band, with contacts ranging between 300 and 1500 kilometers. 

You can find more magnetic loop antennas on his website at vk3ye.com.

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

http://www.HawaiiARRL.info.
http://www.arrl.org.
https://www.arrl.org/arrl-audio-news (a weekly podcast which is updated each Friday afternoon).
https://oahuarrlnews.wordpress.com.
https://hamradiohawaii.wordpress.com.
https://bigislandarrlnews.com.
https://www.eham.net.
http://www.southgatearc.org.

Thanks for joining us today.

Aloha es 73 de Russ (KH6JRM)