Multiband EFHW Base Antenna with 49:1 UnUn (homemade).


Thanks to Paul (OM0ET) for this vital accessory for all End Fed Halfwave Antenna Systems--a 49:1 UnUn.

Paul takes us step-by-step through the design, building, and testing phase of this UnUn.

As designed, this UnUn will enable operations on the 40m-20m-15m-and 10m Amateur Radio Bands.

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

Here are a few comments from Paul (OM0ET):

12,094 views Dec 14, 2022 #antenna #homemade #efhw

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-----Thanks for joining us today.
Aloha es 73 de Russ (KH6JRM).


 

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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).

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