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Indeed. My main problem with talking to VK land is not the efficiency of my antenna but the pile-ups of European amateurs with kilowatt transmitters and steerable beams. The fun of the hobby is

?Ok so I meant to say UNUN or a transformer could be used. I recommend reading ARRL antenna book 25 edition, 3.2.6. Counterpoise systems. If not available look at the definition of counterpoise in

A Balun can be a transformer, but not all transformers are baluns. A balun can also be a suitable "RF choke" that prevents RF from travelling down the outside of the coax, or unbalanced currents in a

I recommend Cebik’s, “Verticals without Vertigo” I find his comments about the counterpoise enlightening. QRP Quarterly Cebik Publications ( http://on5au.be/Cebic/QRP%20Quarterly.html ) on5au.be

A balun is a device used to connect to a symmetrical fed antenna, what you mean is a transformer. 73 Peter, DJ7WW -----Original-Nachricht----- Betreff: Re: [nanovna-users] where is the end fed natural

Same. I've built a lot of antennas- My wife would say a garage full. Barring a beam, the endfed gives me great results from little work. One of the better ones I've built/used.

A BALUN is not a transformer. If impedance matching is required, from the feedpoint toward the coax feed: 1) Attached at the feedpoint of the wire: The transformer to match impedances, then 2) In

?If an antenna is fed at the end it’s an end fed regardless of length. There are 1/4 wave end fed AM broadcast and 1/2 wave end fed AM broadcast antennas. The BALUN is not part of the antenna

That sounds like confirmation bias. When conditions are good you can work the world on a wet noodle. When they are not good you need a kilowatt and an aviation hazard stack in the back yard. That's

And remember an EFHW is a 1/2-wavelength at only one frequency. Other than that it's just an EFW: End Fed Wire. Dave - W?LEV -- Dave - W?LEV

Yes, one can very well use SMD parts in 3D, dead-bug construction style. I have attached a photo of a buffer amplifier for digimodes that I added to the underside of a board in my Kenwood TS-450SAT.

I always need to laugh when I hear such argument for an "antenna". I several times worked a VK station on the long path who was using a whip on his bicycle and 20W in SSB. Is that antenna better or

Sorry for straying off the OP's topic but ... I've never known an antenna polarise amateurs like the EFHW (pun intended). Those who've built one properly love it. Those who haven't say it doesn't

But to reiterate, the majority of "End Fed" antennas are not what the name implies. Electrically they are "off center feed" antennas with frequently, an indeterminate" length of "counterpoise". As a

Be careful when measuring wire antennas with a NanoVNA because static build-up can damage the input. -- Mike

Hi Fran?ois, I have attached the EZNEC model. Remove the .txt suffix before running. -- Mike

Not exactly. You can feed any length of wire and it will radiate. A very short wire will have a very high impedance, so you’ll need a lot of voltage to get some current to flow. And the current

I am not speaking of the method of feeding, only of the characteristics of a wire antenna itself. Antenna engineering was one of my minors as an electrical engineering student. The other one was

I think your assumption is wrong. When we feed an antenna, made of a stretched wire, from one end, in fact we build an antenna which looks like a dipole whose feed is off-center. The second strand is

A half-wave antenna has the maximum current flow in the center and 0 current flow at the ends. Ideally, it would be fed in the center. Current flow is what produces an electromagnetic field, and at