End fed antenna design

I use the Par tri band end fed QRP antenna and use no coax. I hook it directly into my LDG qrp auto tuner and it. Below is one example of how to build an metre band long wire antenna for a house with a small garden. One such antenna is the W3EDP end fed. It consists of an 85ft wire fed against a 17ft counterpoise (attached to the earth point on the ATU).

Some books say that you don’t use the counterpoise at all on 10m.

Others say that you can use a 6. You do need an ATU though. End - fed half wave antennas are best for temporary antennas using low power and batteries, far from power mains and noise sources. They are more prone for problems near noise sources or consumer gear, and can easily exceed FCC RF exposure limits with surprising low power levels.

With a small counterpoise and end -feed we need to: keep the antenna clear of lossy media including the earth. One of the earliest examples was the Zepp antenna One of the earliest examples was the Zepp antenna where the half wave antenna was end fed by an open transmission line. The end fed half wave antenna is a classic HF antenna.

The antenna is an inexpensive, multi-ban end fed HF antenna.

The matching network is a 1:UnUn trifilar wound transformer using a T106-iron toroid core. For example, I have found that my 20m vertical end fed half wave antenna with the bottom 1m from the ground is an extremely effective antenna. DX is very easy with this arrangement as well.

All our antennas have been set up on the bench and fully tested in the field with high power RF to ensure everyone reaches our customers working right out of the box. Power 800w PEP, 400w PEP on multi-band version. I find that an end - fed half-wave is a great holiday antenna. The tuner (for low power) can be made quite small, and metres of wire provides 20m and 10m bands, and with a bit of tweaking 6m as well. The wire can be wrapped up small and the whole thing fit into quite a small space.

Emergency Amateur Radio Club of Hawaii (EARCHI) marketed a matchbox-kit for a 6-mtr multi-band end - fed antenna. A, which includes the parts list and building instructions. A 9:Balun For Your End Fed Antenna. They are usually power limite maybe a good thing, with all that stray RF floating around. He simply pulls it vertically up a tree limb.

This is a neat article, and was very imformative. I’m new to antennas , but have a specific project where an end - fed antenna would make my project much easier, both. End - Fed Antenna projects and plans is a curation of resources about , Endfed wire antenna tuner by KC8AON, W3EDP Antenna , N2CX on End - Fed Halfwave Antennas.

Half-wave end - fed antennas. Inexpensive half-wave end fed antennas ideal for use with our popular end fed tuners.

I never used and end fed antenna before. Multiband end fed antennas 3. The LW-is an end fed long wire multiband antenna which incorporates a 9:UNUN at the feedpoint enabling them to be fed directly with Ohm coaxial cable. G7FEK Limited Space Antenna. Evolving from a simple end - fed Marconi.

End - fed antennas , or antennas with the single wire feeder brought into the shack, come with a little misconception. 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.