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HF Propagatie


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Multiband HF Projekten - Langdraad Antenne's

160–80–40m End Fed Antenna by GØCSK
At the Junction Box , coax inner connects to the antenna wire (blue) and braid connects to the brown wire and ground spike.

Klik voor vergrotingA 40m through 20m QRO End Fed Half Wave Antenna Coupler by AA5TB
I built the circuit into a plastic and waterproof electrical box that I had purchased at The Home Depot. The box is made by Carlon and is 26 cubic inches in size. I used 1/4" stainless steel hardware for the antenna and ground connections and a small terminal strip to mount the components.

Klik voor vergrotingAn End Fed Half Wave Antenna by KT4QW
This page describes my installation of a 130 ft. End Fed Half Wave antenna that is effective 80M through 10M. It is a commercial product manufactured by MyAntennas located in Zepher Hills, Florida.

Klik voor vergrotingDraadantenne door PA3I
Vertical antenne voor de vakantie is handig.
Een soort glasfiber hengel 12,50 M lang besteld bij "DX WIRE"
Met balun en 11 M draad verticaal kan ook natuurlijk in horizontale richting!

Klik voor vergrotingEnd-Fed for 20m multi band by PAØROB
Base: End-Fed antenna for 20m, 10 meter in length.
FT-140-43 ferrite toroid impedance transformer (UnUn).

Klik voor vergrotingEnd-Fed Half-Wave Antenna & Tuner by VK2ZAY
For the on-going 2007 ARNSW Homebrew Group Challenge work I needed a simple 80 metre antenna. As a home-unit resident the size of a full half-wave is pretty impractical, but I decided to try it so I had a base-line to compare future shortened verticals to.

Klik voor vergrotingLong wire antenna for portable operations by VK6YSF
With the view to establish a quick and easy multi-band antenna deployment for portable and camping operations a simple long wire antenna with an earth or earth plus counterpoise arrangement with a 9:1 voltage unun including a tuner or simply with a tuner is one possible solution.

Klik voor vergrotingMulti-Band End-Fed Antenna by N4SPP
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 (center-fed like a dipole, or off-center-fed).

Klik voor vergrotingSlope antenna for HF high band (14-50MHz) by JA1HWO
This antenna is a slightly improved version of the one that was raised instantly for a contest.
Of course, we can't expect much gain because it's just a wire, but it covers the high band of HF, so it's quite convenient and occasionally used.

Klik voor vergrotingThe W3EDP HF Antenna
The W3EDP end fed wire antenna lends itself readily to QRP and portable operation. A simple matching unit is needed to couple the wire to the rig and a counterpoise is required for some bands, ...

Creatie datum : 11/08/2007 @ 00:42
Laatste wijziging : 09/11/2020 @ 20:47
Categorie : Multiband HF Projekten
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