Monday, September 19, 2016

Simple Ham Radio Antennas--Construction of a 9-1 unun. Post #901.


If you're having trouble viewing this video, please insert this title link into your browser search box: https://www.youtube.com/watch?v=L4jGNFGN-RQ.  Here's a handy 9:1 unun from m1tina that will make your use of a longwire antenna much more efficient and pleasurable.  The 9:1 unun is an impedance transformer to feed high impedance, end-fed (unbalanced) random wire antennas, which may exhibit an impedance of a few hundred ohms.  The unun transforms the impedance of the wire into something closer to 50 ohms--something your transceiver will appreciate.  The 9:1 unun is wound on a T200-2 core and has 9 trifilar turns of enamel wire.  This is a great weekend project!

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Aloha es 73 de Russ (KH6JRM).