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Efhw counterpoise

WebMar 21, 2024 · I recently tried assembling a EFHW kit, and some problems came up in testing. I believe this is the kit; I bought it through ARRL: HF Kits website. This is my first time making an UnUn and EFHW kit. ... Based on the photos you provided, it appears that the only connection to the ground/counterpoise stud is the capacitor. If you look at the ... WebI could run 1/4 wave radials in several directions along the ground/just below the surface and feed the inverted L just a few feet off the ground, giving me a longer vertical section. Another option I'm considering is feeding the inverted L at a height of about 10 feet, giving me a 20+ foot vertical section, along with elevated wires at about ...

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WebAug 6, 2024 · The counterpoise will need to be about .05L in length (at the lowest frequency of operation). To build a EFHW Broad Brand Transformer with an inbuilt CMC … WebFeb 10, 2024 · Hi, been playing with antennas on my SOTA activations, in summer linked dipole, in winter a EFHW trapped for 3 bands. Now playing with random wire antennas … free gaither music videos https://swflcpa.net

Counterpoise/ground/radial options for an Inverted L

WebSep 14, 2024 · The MFJ-1714 with and without the additional 1/4 wave counterpoise “tiger tail” is in yellow. Keep in mind this is NOT antenna gain, but effective radiated power that … WebThe End Fed Half Wave Antenna - gnarc.org WebThe EFHW performs similarly to a resonant, half-wavelength dipole on 80 meters, radiating best broadside to the antenna. As long as the impedance at the end of the antenna is suitably high, the SWR ... generally not critical but it is helpful to understand feed line interaction and counterpoise function. In Figure 2A, the ground attachment ... free galaga download for pc

End-Fed Halfwave Antenna, Do they need a counterpoise, or not?

Category:Ham Radio - Update on the EFHW built in counterpoise ... - YouTube

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Efhw counterpoise

EFHW - SOTABEAMS

WebJan 24, 2024 · 3. No, it is not needed, but it can improve the antenna system. An EFHW is simply a half-wave length of wire and a matching device, and that's it. Counterpoises are … WebOct 13, 2024 · Echolink Project on 985. End-Fed Halfwave Antenna, Do they need a counterpoise, or not? Getting Started with Echolink and the 985 Repeater. Hints & Tips. …

Efhw counterpoise

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http://www.gnarc.org/wp-content/uploads/The-End-Fed-Half-Wave-Antenna.pdf WebAug 12, 2016 · Actually, the 9:1 ratio is kind of magic, because 9 is the square of an integer. Your unun has integral numbers of turns in its primary (9 turns between the counterpoise and the radio tap) and an integral number of turns in the secondary (27 turns between the counterpoise and the antenna with 9 of the turns common to both primary and secondary).

WebProject by Frank Bontenbal, PA2DKW Process photos by Bob Inderbitzen, NQ1R Please note: This kit is available from ARRL.The original assembly instructions are available from the manufacturer, HF Kits. To help new … WebSep 18, 2024 · Some commercial EFHW antenna manufacturers (salesmen) state that a ground/counterpoise is not needed (except for safety/lightning protection; true). They rely on the uncontrolled, random capacitance between the coax feedline shield (or your body/radio) and the lossy soil to complete the circuit. Not real good.

WebLaurence, WA2TLY, is asking some questions about a few aspects of the EFHW 80-10 antenna, Why they are there and what they are for? Watch to learn more.Subsc... WebI used some stand-offs for the secondary and a terminal block glued to a small block of MDF for the primary. The coax is soldered to the primary, the terminal block is just to hold it in place. There is a counterpoise …

WebEFHW antenna without a counterpoise may well give rise to problems of various sorts; a counterpoise should not be longer than a quarter-wave; a resonant half-wave will …

http://arrl.org/end-fed-half-wave-antenna-kit bls terry whiteWebJun 11, 2024 · End-fed half-wave (EFHW) antennas provide a convenient way to move the coaxial feedpoint for a half-wave antenna from the center to one end. ... Sometimes, the counterpoise is provided by the coax that feeds the L-matching network, in which case the feedline will definitely carry common mode currents that will tend to spoil the antenna … bls tech sector employmentWebI've tried it several different ways, and the difference is hard for me to tell. I've seen advice to put the counterpoise perpendicular to the antenna wire, or parallel to the wire (under it) … freegal air forcefree galactic backgroundWebCounterpoise: The coax shield isn't "ideal" but it definitely can work fine. I do not have a counterpoise on my EFHW, and I regularly run my Henry 2k4 at full power into it. No … bls testinghttp://vtenn.com/Blog/?p=1089 bls test ahaWebEFHW antennas might have elevated SWR readings on some bands due to the different position, height above ground or impact from nearby objects. ... Also, do not listen to internet “experts” saying that some form of hanging … free galatea books