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  1. Let's Build an EFHW Antenna. 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.

  2. (EFHW) dipole antenna. The frequency band is HF (40 meters), and the intended power is 100 watts. Interest in the EFHW antenna has increased significantly over the last few years. Perhaps the main reasons being: It is inexpensive and easy to build, easy to deploy, can be portable, and it is multi band. The last reason may be

  3. This project assembles a 49:1 ferrite-core (“FT”) type #43 transformer that matches 50 ohm input to 2500 ohm end fed antenna. It is optimized for 3.5/7/10/14 MHz but will work reasonably well on all amateur bands from 80 meters thru 10 meters with a 135 foot length of wire and a short connection to ground.

  4. To help new hams prepare for the exciting world of HF opening up during Cycle 25, ARRL has partnered with HF Kits to bring you this easy-to-build four-band antenna kit: an end-fed half-wave (EFHW) antenna.

  5. 28 gru 2016 · Construction of the EFHW coupler, step-by-step. What you need: A toroid or ferrite core (should be large enough) Enameled wire (I used 0.5mm wire, but this is not very critical) A suitable case (I used an electrical case from the DIY store – fits perfectly) Some kind of socket or screw-type terminal for the antenna wire and counterpoise

  6. 4 sie 2020 · What is an EFHW? 1/2 wavelength long antenna, fed on the end. Can be vertical or horizontal (or both). Can be tuned and limited to a single band. Matching is done by a parallel LC network. Can be fed with a 1/4 wave ladder line, but will be single banded. Can be fed with a broadband high-impedance transformer for multi-band use.

  7. 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.

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