If you're mainly interested in 7 MHz and up then about 20 metres of wire (ie a half wave on 40 metres) is recommended.

This is due to the wire end impedance of a 1/2λ dipole being close to 2450Ω, which is the feed point impedance of an EFHW (ie at the secondary of the impedance matching transformer).

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Drill the four fastening holes with a 9/64 inch bit.

This is due to the wire end impedance of a 1/2λ dipole being close to 2450Ω, which is the feed point impedance of an EFHW (ie at the secondary of the impedance matching transformer).

75 MHz min SWR at different transformer ratios. Step 2. 95 Buy.

Mar 13, 2020 · The EFHW-8010-2K End-Fed Halfwave 2kW Multiband Antenna with mounting kit by Myantennas.

Find Par EndFedz® Antennas and get Free Shipping on Most Orders Over $99 at DX Engineering! Par EndFedz® Antennas are End Fed Half Wave (EFHW) antennas with the match box coax connection at the end of the wire, for convenient and quick stealth portable operations. . Here are instructions for making a multiband end-fed half.

a EFHW), antenna impedance is in the 2000-4000 ohms range. Putting up an end fed antenna at home after removing it for some repair work.

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. Put the coax connector into the hole and use a marker to mark the four holes for the screws (see 2A and 2B).

. The end fed feature adds portable convenience, but does.

The black dots represent exact harmonics of the 3.
If you're mainly interested in 7 MHz and up then about 20 metres of wire (ie a half wave on 40 metres) is recommended.
This video I designed an EFHW antenna and I changed a few parameters with the items I used to build it.

As designed, the matchbox can handle up to 150 watts PEP.

Antenna being put up is:https://www.

End-fed radiators have the unique quality of resonating on the 1/2-wave fundamental frequency plus odd/even harmonics above! Broad-band matching transformer at feed point lets the entire HF spectrum be yours!. . .

May 1, 2021 · A Brief Synopsis of the Antenna Features & characteristics In this article, I will try to cover various aspects of the End-Fed Half-Wave (EFHW) wire antenna including, its geometry, characteristics, performance parameters, the influence of the practical surrounding environment where the antenna might be deployed, as well as transmission line interfacing. . This is due to the wire end impedance of a 1/2λ dipole being close to 2450Ω, which is the feed point impedance of an EFHW (ie at the secondary of the impedance matching transformer). This turned out to be one weird antenna. .

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Dec 24, 2015 · To facilitate installation, tuning, and future maintenance, the antenna supports were chosen to be ring-eyed lag bolts with pulleys attached. Add an antenna "tuner", a sturdy rig,.

It took me 10 minutes to install and WOW - within 10 minutes I made my first HF contact (from CT to GA).

OnTech's professionally trained.

Improved version of the EFHW-4010-2K, now with three large cores, 2.

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90 = 79' 3".