Simple Loop Antenna for 20-10 meters.



Here's another great antenna idea for the ARRL Field Day or for any portable operation.

Lynn (NG9D) takes us step-by-step through the design, construction, deployment, and testing of a Loop Antenna covering 20-10 meters.

The antenna features moderate gain at an affordable price.  You may be able to find most antenna materials locally or in your "junk box."

If you can't see the video, please insert this title URL into your browser search box:  https://www.youtube.com/watch?v=y3-LIQ6G6e4

Here are a few comments from NG9D:

Here on    / ng9d   we spend a lot of time fiddling around with low power (QRP) radio transmitters, simple receivers, home-made wire antennas and various little gadget kits, celebrating perhaps the best hobby in the world - Ham Radio! In this video, we build a ham radio DX antenna - an inexpensive portable or permanent wire loop antenna installed from ground level by one person supported by a single tree. Includes construction hints and demonstrations. Technical Data: - Type: one-wavelength diamond loop antenna - Polarization: horizontal - Gain: +1 db (ref: dipole) - Polar Radiation pattern: bi-directional, broadside to loop - Elevation Radiation Pattern: low angle - Fundamental Resonant Frequency: 14.150MHz (VSWR of 1.0:1) - Operating Bandwidth: 14.000-14.350 MHz (VSWR less than 1.75:1) - Loop Length: 1.33% shorter than free-space wavelength of 300/f(MHz) - Length Formula (meters): L=296/f (MHz) - Length Formula (feet): L=970/f (MHz) - Length of Demonstration Antenna: L=296/14.15=20.9m; (L=970/14.15=68.6 feet) - Loop Material: insulated copper wire - Feedline: Coaxial; 100 ft RG-6U + 20 ft RG-58 with barrel disconnect - Feedpoint Location: bottom center - Feed Point Height: ~ 1m (3 feet) above ground -Direct coax feed only. Note: At fundamental design frequency the feedpoint impedance of a full wave loop is 120 ohms. Tuning for all bands above the resonant frequency can conveniently be accomplished in the shack with an ATU, using coax feed. - Overall Height: ~ 8.5m (28 feet) - Overall Width: ~ 7.5m (25 feet) - Other Frequency Bands: 18, 21 and 28MHz may be used without tuner (VSWR less than 3.0:1). With Antenna Tuning Unit operation on all frequencies above 14 MHz is possible. - Construction: soldered electrical connections, mechanical details can be adapted to suit intended service life of antenna and exposure conditions. - Structural Support: Tree IMPORTANT SAFETY WARNING: Do not install near overhead power lines. Keep antenna out of the reach of children. Disconnect antenna when not in use. 73 de NG9D "Antena (Amateur Radio)", "Antena (radioaficionado)" antena de Planes de proyecto de demostración de los datos técnicos "Antena (radio)", "Antena (onda corta)", "Antena (transmisión)" "antena (recibiendo)" de onda corta del código Morse "Антенна (Amateur Radio)", "Антенна (радиолюбителей)" рамочную антенну Планы демонстрационных проектов технических данных "Антенна (радио)», «Антенна (коротковолновой)", "Антенна (передачи)", "Антенна (recieving)" коротковолновое азбуки Морзе "Antenna (Amateur Radio)" "Antenna (Amateurfunk)" Loop-Antenne Pläne Demonstrationsprojekt technischen Daten "Antennen (Radio)" "Antenna (Kurzwelle)" "Antenna (Senden)" "Antenna (Höhrgerät)" Kurzwelle Morse-Code

Thanks for joining us today.

Aloha es 73 de Russ (KH6JRM).


 

Comments

Post a Comment

Thank you for visiting my Amateur Radio Blog. I value your comments and suggestions. For Amateur Radio Antenna Topics and Discussions, stay here. For Amateur Radio News and Trends, please visit my news site at https://bigislandarrlnews.com.
Aloha es 73 de Russ (KH6JRM).

Popular posts from this blog

G5RV Multi Band HF Dipole Antenna. Post #1555.

Image
If you can't see the video, please insert this title URL into your browser search box: https://www.youtube.com/watch?v=aeNHIQ_j4Dk This well-produced and richly illustrated tutorial on the classic G5RV HF Dipole Antenna was presented to the Brandon Amateur Radio Society in Brandon, Florida in 2017 by Bernie Huth (W4BGH).  Bernie does an excellent job of  explaining the pros and cons of this popular HF antenna from the late Louis Varney (G5RV).  Although Varney envisioned his design primarily as a 3/2 wavelength antenna for the 20 meter Amateur Radio band, radio amateurs have used the antenna for multiband use.  The G5RV is an excellent choice for the 20 meter band.  Performance on other HF Amateur Radio bands is good enough to qualify as stand alone HF antenna if you can only erect one HF 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 wee
Read more

Antenna for Condo Backyard-Stealth. Post #1542.

Image
If you can't see the video, please insert this title URL into your browser search box: https://www.youtube.com/watch?v=MXTYTytR56A. Don't let deed-restricted properties (HOA/CC&R) stop you from enjoying Amateur Radio.  In this video from AC2RJ, we see how some well-placed trees, a camera tripod, a telescoping fiberglass mast, and a "V" antenna can get you on the air without a lot of effort.  Add an antenna "tuner", a sturdy rig, such as the Yaesu FT-817, a microphone/cw key, and a simple grounding system, and you have a fully functional, nearly invisible ham station in your backyard. 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://hamradiohawaii.wordpress.com. https://bigislandarrlnews.com. https://amateurradionewsinformation.com (Amateur Radio News &
Read more

Amateur Radio Bicycle Mobile Setup. Post #1554.

Image
If you can't see the video, please insert this title URL into your browser search box: https://www.youtube.com/watch?v=2zWb-KnkGdY. Here's a way to use Amatuer/Ham Radio while you work on shedding a few pounds in useful exercise.  Why not equip your bicycle for 2 meter/70 cm mobile operation? In this short, well-made video, "taverned" shows us how he used a mag mount antenna, a simple C clamp, and a basic ground system to convert his mountain bike into a mobile station.  The project is straight forward, simple, and gives you emergency communications while you peddle down the road. 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://hamradiohawaii.wordpress.com. https://bigislandarrlnews.com. https://amateurradionewsinformation.com (Amateur Radio News & Information).
Read more