Multiband EFHW Base Antenna with 49:1 UNUN (Homemade).


 

Here's another great antenna project from Paul (OM0ET).

In this video, Paul makes a sturdy 49:1 UNUN for a new EFHW Antenna covering 40m, 20m, 15m, 10m without bulky coils or traps.

The building procedure is simple and direct and produces a beautifully designed and efficient antenna accessory.

If you can't see the video, please insert this title URL into your browser search box:  https://www.youtube.com/watch?v=z-_2aBqcjI8.

Thanks for joining us today.

Aloha es 73 de Russ (KH6JRM).

Here are a few comments from Paul (OM0ET).

CORRECTION: Toroid core is used FT240-43 (not 140-43) My new home made Multiband End Fed Half Wave Antenna which has been designed mainly for 40M band (7MHz), but this antenna tunes also on 20M-15M-10M without any traps or additional coils. This antenna is made for 100W RF input power and is 19,129m long. SWR on 40M band is 1:1.1 within the phone section and less than 1:1.5 within a whole band. The 49:1 UNUN box is weather proof and all holes for components I drilled were sealed against the water. On the end of the video you can see also an extreme weather followed the next day :D Please, if you like my video don't forget to subscribe to my channel and hit the bell button to not miss any of a new video or livestream 😉👍 Thank you for watching and 73! Paul. #efhw #antenna #homemade

OM0ET

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