Ferrite Rod TX Antennas-G3XBM QRP WEBSITE. Post #1118.

Ferrite Rod TX Antennas-G3XBM QRP WEBSITE
(https://sites.google.com/site/g3xbmqrp3/antennas/ferrite_tx).
Author:  Roger (G3XBM).
Accessed on 01 May 2017, 20:30 hrs, UTC.
Please click link to read the full article.

Comment:

I found this intriguing article from Roger (G3XBM) while I was searching for some experimental antenna ideas.  I must admit that using a ferrite rod as a transmitting antenna never really crossed my mind.  I've used ferrite rods as antennas in small transistor radio projects, but never in a transmitting capacity.

Roger's ferrite rod antenna consists of 80 turns of 0.5 mm diameter wire with a 365 pF air-spaced variable capacitor in parallel with about 60 turns of the wire and in the 50 ohm range of one of the lower taps.  Roger says he was able to get a 1:1 SWR on 40 meters using a Yaesu-817 running 5 watts of power.

Roger adds that the antenna was tried in a vertical position, and received many reports of his WSPR signal throughout Europe.

Roger has provided several helpful photographs and recorded data to help you build your own ferrite rod transmitting antenna.  This should be an easy weekend project for those of us into antenna experiments.

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).

Other sites of interest:

http://hawaiisciencedigest.com.
https://hawaiiintelligencedigest.com (trends in geopolitical intelligence, strategic forecasting, politics, terrorism, and cybersecurity).

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

Opinions expressed in this blog are mine unless otherwise stated.

Thanks for joining us today.

Aloha es 73 de Russ (KH6JRM)

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

"Big Hat" Vertical Antenna. Post #1422.

Image
If you can't see this video, please insert this title URL into your browser search box: https://www.youtube.com/watch?v=xgOqP8uPEPc. Here's an interesting antenna design for radio amateurs exploring the 630 meter and 2200 meter amateur radio bands.  This classic antenna is basically a top loaded vertical designed for frequencies below the standard broadcast band (472 kHz and 137 kHz).  Even though this antenna is inefficient, a digital signal using the FT8 protocol should get you some contacts.  Good luck! 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). http://amateurradionewsinformation.com (Amateur Radio News & Information). http://www.southgarearc.org. https://hamradiohawaii.wordpress.com. https://bigislandarrlnews.com. Be sure to check the blog sidebars for more antenna and propagat...
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

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/ar...
Read more