Tuesday, May 23, 2017

Compact Multi-band Field Day Antenna. Post #1140.


Compact Multi-band Field Day Antenna
(http://www.nc4fb.org/wordpress/compact-multi-band-field-day-antenna-80-10-meters/)

Accessed on 23 May 2017, 20:45 hrs, UTC.

Author:  NC4FB.

Please click link to read the full article.

Comment:

How about a new and different HF antenna for the 2017 ARRL Field Day on 24-25 June 2017?

In this post, NC4FB offers a variation on the popular G7FEK nested 1/4 wavelength compact Marconi antenna that fits into a space of 46-feet/14.02 meters long and 24-feet/7.31 meters high.  This antenna offers a low angle of radiation, covers 80 through 10 meters, and is coax-fed.  An antenna "tuner" is required to optimize antenna performance.

Construction guidelines are here:

http://www.g7fek.co.uk/software/G7FEKantennas.pdf.

NC4FB offers his opinion on this cleverly designed multi-band HF antenna:

My friend KI4PMI and I always like to try something different each ARRL National Field Day.  This year we selected the G7FEK as one of the antennas to be used during Field Day.  The antenna turned out to be easy to build and after some experimentation we were able to adjust the 40 meter and 20 meter radiating elements for very low SWR operation using an AIM-4170C analyzer. The 80 meter band SWR curve was excellent without any adjustment.  The other bands (17, 15, 12, 10, 6) indicated useable SWR curves but will require a good antenna tuner.  We used a Palstar AT-500 manual antenna tuner to successfully tune these bands for maximum power transfer from the transceiver.


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


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

Other sites of interest:

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

Opinions expressed in this blog are mine unless otherwise stated.

Thanks for joining us today.

Aloha es 73 de Russ (KH6JRM)

Monday, May 22, 2017

Portable Radio Field Operation Post #1139.


If you can't view this video, please insert this title URL into your browser search box: https://www.youtube.com/watch?v=NeWOvIx8bms.

Camping and ham radio are great companions. In this video, we get a basic tutorial on how to combine both hobbies into one enjoyable pursuit.  Some of the suggestions shown here can also be applied to the upcoming ARRL Field Day exercise on 24-25 June 2017.  If you're assigned to the late evening operating crew, you'll be glad you set up your tent and operating position as explained in this video.  Most of the materials for this camping operation can be obtained locally or from equipment you already have in your ham shack.

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

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

Other sites of interes:

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

Be sure to check out the blog sidebars. These news feeds are updated daily.

Opinions expressed in this blog are mine unless otherwise stated.

Thanks for joining us today.

Aloha es 73 de Russ (KH6JRM)

Sunday, May 21, 2017

Portable Field Antenna Project. Post #1138.


If you can't view this video, please insert this title URL into your browser searchbox: https://www.youtube.com/watch?v=VXo0XucRpt0.

Here's another intriguing portable antenna idea from NG9D.  In this video, we learn how to design, build, and use a 3-band HF "Lambda" antenna, so named because it resembles the Greek letter "Lambda." Basically, the antenna approximates a 1/4 wavelength 40 meter vertical with a single 1/4 wavelength elevated radial wire or counterpoise.  This antenna requires an antenna "tuner" for multiband HF use.  The video covers construction tips, "no solder" assembly, and how to make a homebrewed feed line.

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

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

Other sites of interest:

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

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

Opinions expressed in this blog are mine unless otherwise stated.

Thanks for joining us today.

Aloha es 73 de Russ (KH6JRM).

Saturday, May 20, 2017

2013 VK3YE Operating HF Pedestrian Portable Presentation. Post #1137.


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

Australian radio amateur Peter Parker (VK3YE) is well known for his work with portable HF antennas.  In this presentation before the Eastern and Mountain Radio Club, Peter discusses various antennas suitable for HF Pedestrian Portable Operation.  Peter offers a wealth of suggestions regarding antennas, batteries, radios, and support structures that will facilitate "radio on the go".  Especially interesting is the explanation of his bamboo pole-supported Slim-Jim antenna for 20 meters and his small, hand-held loop antenna.  A great presentation.

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

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

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

Opinions expressed in this blog are mine unless otherwise stated.

Thanks for joining us today.

Aloha es 73 de Russ (KH6JRM)

Friday, May 19, 2017

SIMPLE HAM RADIO FIELD OPERATION. Post #1136.


If you can't view this video, please insert this title URL into your browser search box: https://www.youtube.com/watch?v=JPdtN6AtXmI.

You don't need a lot of fancy, expensive equipment to enjoy an effective portable ham station for outdoor operations, such as the upcoming ARRL Field Day.  In this video from Lynn (NG9D), we see just how simple it is to put up a random wire antenna (about 75 feet/22.86 meters) using a tree as support. Lynn completes his portable station with some Ten-Tec QRP cw gear, a MFJ antenna "tuner", a power supply, a simple ground radial/counterpoise system, a simple hand key, and a short length of coaxial feed cable (about 20 feet/6.097 meters). Lynn's set up is light and thoroughly portable. This station can be carried on your back or left in your vehicle for emergency use.  Why not participate in Field Day as a 1B station at the nearest park or even in your own back yard?

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

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

Be sure to check the blog sidebars for more antenna, propagation, and science news.

Opinions expressed in this blog are mine unless otherwise stated.

Thanks for joining us today.

Aloha es 73 de Russ (KH6JRM)