WebMay 1, 2024 · The End Fed Half Wave antenna or the popularly known EFHW antenna has been around almost ever since the inception of HF radio. Nevertheless, the EFHW … WebA shortened multi-band End-Fed Half Wave (EFHW) antenna for 80-10m Steve Nichols G0KYA A shortened multiband antenna, about 23m long, for 80m-10m that offers low SWR (1.3:1) on 80m and 40m, and below 3:1 on 20, 15 and 10m. The antenna has a full 300kHz bandwidth on 80m between 3:1 SWR points. But performance is down about 8-12db on …
Spark Plug Portable Antenna — Spark Plug
WebEFHW 49:1unun 40 / 20 / 10 m 150W Short with coil. This is an End Fed Short Wire wire antenna that will cover all bands from 40 / 20 and 10 meter.. £58.00 Ex Tax:£58.00. Add to Cart. WebAntenna modeling suggests that the impedance is closer to 1800 ohms depending on the "counterpoise" length used. As the "counterpoise" itself approaches a half wavelength, the impedance approaches 5000 ohms. In the graph below I have plotted what MININEC predicts for the impedance of an end fed half wave antenna versus the "counterpoise" … aryah landsberger
How to choose the best HF antenna to enhance DX and NVIS
WebFULL HF Coverage, no tuner needed on most frequencies. No long counterpoise, radials or feedline required. Rugged weather-resistant 50-Ohm matching network. Fast Setup and … WebIn this lengthy video, I am building the end fed half wave antenna available from Adam K6ARK. This is the smallest antenna that I have ever seen much less built. It requires no feedline as it... WebSep 1, 2024 · Messages. 13,875. Location. So Cal - Richardson, TX - Tewksbury, MA. Jun 21, 2024. #2. The MyAntennas EFHW-4010-1K is a really good antenna and requires no ground or radials for operation, except for grounding the coax per NEC for safety. I do recommend a good common mode choke balun within maybe 5 and 20ft of the antenna. bangka belitung ibukotanya