Building an End Fed Half Wave Antenna - EFHW The half wave end fed antenna is simply a half wavelength wire fed at the end rather than the center like the half wave dipole.

Others say that you can use a 6.5ft counterpoise on 20m. One commonly repeated myth or "theory" is that half-wave antennas, being resonant, do not require a counterpoise, or that some magical length of antenna will prevent RF in the shack. As long as you are feeding the wire in 1/2 wavelength multiples you don't need ground radials or a counterpoise. By adding a broad-band matching network, the wire’s high impedance feed point is transformed down to 50 ohms across a wide frequency range and, in most cases, you don’t need a …
at the transmitter end of feedline will stop RF from entering your equipment and reduce receiver noise caused by … I built an end fed antenna using a match box or un un that I bought on ebay a few weeks ago, I followed the directions and used 58 feet of 14 gauge Flexweave wire. I have made a ground connection on the grounding lug. EFLW-1K End Fed Long Wire Antenna. The end fed antenna is essentially half a dipole, it uses a good earth connection to complete the arangment.

Building an End Fed Random Wire Antenna Mon Apr 15, 2019by gm_stack I’ve previously covered building a multi-band linked dipole Inverted V antennaon here.
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Although not necessary, a 1:1 isolation/choke balun (models, 1110, 1113, 1115 etc.) End-Fed Horizontal Wires (EFHW) cover multiple bands with-out traps, stubs, or resonators. The end fed wire antenna simply consists of a length of wire that is as high and reasonably long as possible. End-fed radiators have the unique quality of resonating on the 1/2-wave fundamental frequency plus odd/even harmonics above! It consists of an 85ft wire fed against a 17ft counterpoise (attached to the earth point on the ATU). We offer a variety of multi-band and all-band dipoles that provide great receiving performance with low SWR. End-fed radiators have the unique quality of resonating on the 1/2-wave fundamental frequency plus odd/even harmonics above! End-fed wires resonate on their 1/2-wave fundamental frequency plus all odd and even harmonics above . EFLW-1.5K End Fed Long Wire Antenna This is an End Fed Long Wire wire antenna that will cover all bands from 160 to 6 meters, including the WARC bands, as well as 60 meters and MARS frequencies. A special case of this, is the End-Fed Half-Wave (EFHW) antenna. Below is one example of how to build an 80 metre band long wire antenna for …

As the name suggests, an "end-fed" antenna is just that: the radiating element is fed at one of its ends, instead of somewhere in-between its two ends (i.e., center-fed like a standard dipole, or off-center-fed). This is an End-Fed Half-Wave (EFHW*) antenna for 80/40/30/20/17/15/12 and 10m bands. End-fed, half-wave antennas (EFHWs) are a half-wavelength long and are resonant antennas on the band of interest.

Obviously, an … The wire is then connected to the transmitting and receiving radio communication station. Feeding it with 25 foot section of RG8u. It utilizes a 9:1 UNUN transformer in order to bring the impedance of the antenna to more manageable values for your antenna tuner.