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).