Efhw coil
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. WebOct 4, 2024 · An End Fed Half Wave (EFHW) antenna for operation on 20, 30 and 40 meters was built for SOTA operation. By using traps, the antenna works on all three bands with no operator interaction. ... Before winding …
Efhw coil
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WebEFHW-4010-LP- 250W Portable or Stationary Multi-Band End Fed Half Wave Antenna/ This is a 250W version of the popular EFHW-4010-1K+ End-Fed Half-Wave (EFHW*) antenna for 40/20/15/ and 10m bands. Featuring an optimized MEF-130-LP transformer with an average insertion loss of only -0.4 dB (~9% loss) compared to similar products on market with ... WebJun 1, 2024 · Here’s a photo of the competed unit: My EFHW match box. 3:24 turns ratio on a FT140-43 toroid with a 150pF capacitor across the input. I experimented by attaching a load resistor between the output …
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WebApr 28, 2024 · The little coil helps place the EFHW resonance points where we want them. WebDec 27, 2024 · An end fed half wave antenna, or efhw, is a variation of a half wave dipole, but it is fed from one end. Being end fed, it needs a transformer to transform the higher impedance of the wire to the 50ish ohms the radio is expecting. ... Some of my research showed that a small compensation coil can be added about 2 meters from the …
WebJul 20, 2024 · I set up an EFHW for field day using a similar transformer with 25 ft. of coax from the box, everything floating, to my battery powered radio. Transmitting on 15 meters was impossible because of RF into the radio. …
http://www.gnarc.org/wp-content/uploads/The-End-Fed-Half-Wave-Antenna.pdf tangled lyrics songWebJul 13, 2024 · Here are my experiments and modifications with an EFHW (end-fed half wave) based on the VK4YE design, testing, 80m loading coil, the coax counterpoise, and the common mode toroids. This allows a antenna for smaller spaces and backyards. tangled maximus buttWebMay 27, 2015 · EFHW-8010-1K is the ultimate MAGIC antenna! There is no BIG secret about the EFHW-8010 antenna, it is just a wideband low loss transformer and a piece of … tangled main characterWebSep 2, 2024 · Review of the Packtenna Antenna systems in the November 2016 QST magazine. Installing traps on an antenna allows you to turn your EFHW into a multiband antenna. When you switch bands on your radio, … tangled magic hair song lyricsWebJul 10, 2024 · Here are my experiments and modifications with an EFHW (end-fed half wave) based on the VK4YE design, testing, 80m loading coil, the coax counterpoise, and … tangled maximus butt deviantartWebJul 10, 2024 · Here are my experiments and modifications with an EFHW (end-fed half wave) based on the VK4YE design, testing, 80m loading coil, the coax counterpoise, and t... tangled makeup collectionWebMay 27, 2024 · Conclusions. For my 20, 30 and 40 meter EFHW antennas I will not use a capacitor in the primary. Don't sweat the digits to the right of the decimal point too much, the SWR readings changed as the feed height and droop of the antenna changed. Nothing drastic but likely the SWR on the summit will vary as conditions and the setup change. tangled magic hair song