WebFeb 24, 2024 · A half wave is, well, a halfwave, for a given band. Feeding it at the end is a high voltage point, which requires a matching unit--usually a toroidal /ferrite system nowadays at the end-feed--and incurs losses. It is certainly convenient to put up. Its fairly easy to use an ATU on an end fed antenna to get other bands, especially ones higher in ... Web92' 6" 28.195 m. *ALK = Antenna Length Constant. Includes calculated K and end-effect factors. This calculator is an aid for determining antenna element lengths, based on Frequency, Type (Wire or Tubing), and Diameter (AWG#, inches, mm) of the element. At the top of the calculator, enter the Frequency (1 to 30 MHz) of interest.
End fed wire feed line length RadioReference.com Forums
WebAug 27, 2024 · The parts and instructions are easy to find if you want to build it yourself. - 49:1 transformer (The watts you intend to use will guide the core needed if you plan to … WebNote that the point of this article is not to provide definitive values of impdances vs. length (since many factors influence this result), but rather to show what happens as the counterpoise length approaches zero. We … hotwoods lil sport
EFHW - SOTABEAMS
WebMar 21, 2024 · 1 Answer. Sorted by: 1. With a 9:1 endfed, you don't want it to be a 1/4 wavelength at any band. The reason for this is because the 9:1 transforms your roughly 400-900 ohm load into something close to 50 ohms. If you want more antenna length, somewhere around 53-59ft should work well. Share. Improve this answer. WebThis presentation explaining the basics of End Fed Half Wave (EFHW) antennas was done at the REAST DATV experimenters night hosted by Justin VK7TW and Hayden... WebSWR values can be as high as 10:1 and low as 1.5:1 depending on the band, wire length, coaxial cable length, and configuration of wire. ... EFHW-4010-LP. Rated 4 out of 5. by … linkedin chief product officer