MFJ Duplexer-two radios one antenna or vice versa

If you can't see the video, please insert this title URL into your browser search box:  https://www.youtube.com/watch?v=i9ttJn7Qy_s.  This is post 2239 in a continuing series of simple ham radio antennas.

Here's a handy device from MFJ that allows two radios (2m/70cm) on one antenna and vice versa.

David Casler (KE0OG) does a good job of explaining the theory and use of this useful tool.  Here are some of his remarks.:

"A look at the MFJ-916B duplexer with SO-239 connectors (also available with N connectors and also available with an outdoor version). You can use this to connect a 2m radio and a 70cm radio to share a single, dual band antenna, or use it with a dual-band radio to connect to a separate 2m antenna and 70cm antenna. Interesting device! Subscribe: https://youtube.com/user/davecasler. Ask Dave Playlist: https://goo.gl/inaQeB. Tip Jar: http://ke0og.net/tip-jar To learn more about me, visit: http://www.dcasler.com/about/ Tip jar (on my website): http://www.dcasler.com/tip-jar/ (provides a method to use your credit card via PayPal, Also describes Patreon) To pose an Ask Dave question: http://www.dcasler.com/ask-dave/ or http://www.ke0og.net/ask-dave/ To order the most recent and up-to-date Amateur Extra videos on a thumb drive: http://dcasler.com/aevids-on-stick/ Theme music is "Sour Tennessee Red," by John Deley and the 41 Players, courtesy YouTube Music Library. I use drawings from OpenClipArt.org, including the "walking man" Technician training videos, see http://www.ke0og.net/training/ General training videos, see http://www.ke0og.net/general/ Amateur Extra training videos, see http://www.ke0og.net/extra/ List of the Ask Dave videos, see http://dcasler.com/ask-dave/#askdavelist Thanks to my sweet wife, Loretta, KBØVWW, for both audio and video assistance! (Her website is www.aldea-art.com.) My primary website: http://www.dcasler.com The ham radio part of my website (direct link): http://www.ke0og.net My publishing website: http://www.mtsneffelspress.com, where you can find my fantasy and science fiction books, as well as some local history books I publish for the Ridgway Railroad Museum and the Ouray County Historical Society My Amazon author page, which lists my print and Kindle books: http://www.amazon.com/-/e/B00471I0Q4. I'm often asked what equipment I use to create the videos. The devices include the Panasonic DMC-G7 camera, Panasonic HDC-TM90 video camera, GoPro Hero2 HD camera, Tascam DR-05 audio recorder, Audio-Technica ATR-3350 lapel microphone, Sony Cyber-shot DSC-W560 digital camera, the Kodak Zi-8 video camera, my iPhone 5S. Software used: CyberLink PowerDirector 17 on an HP Gaming Pavilion, also using Smoothdraw 4.0.5.0, FastStone Image Viewer 5.3, FastStone Capture 8.0, Audacity 2.1.1, LibreOffice 5.0.4.2, and Ink2Go 1.7.2. You can see how my studio is set up by viewing https://youtu.be/wFSQ8vtNA5A."
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Thanks for joining us today.

Aloha es 73 de Russ (KH6JRM).

Other resources:

http://www.Hawaii ARRL.info
http://www.arrl.org.
http://www.blubrry.com/arrlaudionews/
http://www.hamradioupdate.com.
http://www.sourthgatearc.org.
https://oahuarrlnews.wordpress.com.
https://hamradiohawaii.wordpress.com.
https://bigislandarrlnews.com.
https://www.eham.net.
https://paper.li/f-1576465810 (breaking Amateur/Ham Radio News).

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