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1. noji.com › hamradio › pdf-ppt80-10 end-fed half-wave antenna with 49:1 unun - Noji

   noji.com › hamradio › pdf-ppt

   This EFHW antenna (patterned after one by Steve Ellington N4LQ, with notes by K1RF), if built carefully, will serve you for many years, and at up to 200 watts. The heart and engineering of its design is in its 49:1 impedance matching transformer, or unun (connects an unbalanced

2. n7tar.org › wp-content › uploadsThe End-Fed Half-Wave (EFHW) Dipole Wire Antenna - N7TAR

   n7tar.org › wp-content › uploads

   The type and design of the antenna is based on any number of parameters: specifically, the frequency or band of frequencies, location, directivity, and intended power range.

3. hamradiofornontechies.com › lets-build-an-end-fed-half-wave-antennaLet's Build an EFHW Antenna - HAM Radio for Non-Techies

   hamradiofornontechies.com › lets-build-an-end-fed-half-wave-antenna

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   If you attended Field Day 2022, you may have been one of the students that learned how to build an end fed half wave Antenna and actually got to build one and take it home. For those that were not able to do so, this page is for you. Building antennas is a fun learning experience for any ham operator and one that will serve you well for many years.

4. g0kya.blogspot.com › 2017 › 01A shortened multi-band End-Fed Half Wave (EFHW) antenna for...

   g0kya.blogspot.com › 2017 › 01

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   27 sty 2017 · A shortened multi-band End-Fed Half Wave (EFHW) antenna for 80-10m. This is 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 almost 300kHz bandwidth on 80m between 3:1 SWR points.

5. ab1dq.com › 2024/11/19 › fall-2024-antenna-project-a-shortened-efhw-for-80-10-metersA Shortened EFHW for 80 – 10 Meters – AB1DQ

   ab1dq.com › 2024/11/19 › fall-2024-antenna-project-a-shortened-efhw-for-80-10-meters

   3 dni temu · NOV. 10: CONSTRUCTING A COMMON MODE CHOKE. On November 10, I built the final component of my new EFHW antenna, a Common Mode Choke, or CMC. It is highly recommended that a choke be used with an end-fed antenna to prevent the shield of the coax feedline from becoming part of the antenna system and radiating RF unintentionally.

6. www.gnarc.org › wp-content › uploadsNovember 14, 2018 Steve Dick, K1RF - gnarc.org

   www.gnarc.org › wp-content › uploads

   What are the advantages of an EFHW fed with an UNUN compared to other wire antennas? Ease of installation. Only a single high point required. Many configurations possible to suit your installation: Horizontal, Inverted V, Inverted L, Sloper, etc. No hanging feedline. Feed point is near the ground.

7. xczcomm.com › 2021 › 10End Fed Half Wave (EFHW) 10-15-20-40-meter Antenna

   xczcomm.com › 2021 › 10

   Unlike the dipole antenna, which is comprised of two quarter-wavelength wires and fed at its center, the EFHW is a half-wavelength antenna with the coaxial cable for your transceiver attached at one end. It has become popular with portable operators because it’s very simple in its construction and deployment.