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