The QRPer Board

How did it work for you? Exactly as described, tried that with a 10 meters band dipole and the difference in gain and takeoff angle was definitely perceivable even without running a full blown field measurement, repeated the tests on 6m and 2m bands and got the same results, so confirming that what...

Verticals means messing with masts and counterpoise wires. That means more work and time. I'm trading some efficiency for convenience and weight. Not in this case, no counterpoise, maybe you'll need to re-read how the antenna is configured; then the "mast" may be a telescoping fishing rod...

This sounds like a good design. I used a fan dipole in the attic when I lived in Germany, which did very well - the roof was ceramic tile over wooden beams, so it wasn't too noisy. I like the idea that this antenna has some gain, although I'm sure that varies greatly depending on attic space availa...

A poor antenna is better than no antenna (although my logbook might disagree). Well, if the choice is between some "arranged" antenna and no antenna at all, I think most people will go for the first; I'm not saying that the BBTD installed in an attic or around a roof is a "beam"...

KL7MJ wrote: ↑Tue Jul 09, 2024 8:30 pm Why would you prefer the HB9XBG over an EFHW? The EFHW is resonant on all multiples where the HB9XBG is only resonant on odd multiples (as far as I can tell), but they are the same length (1/2 lambda).

check the radiation pattern (and the gain)

Hi Rick ! A suggestion, if you feel versed to run a little experiment, put it up vertical and connect one or more counterpoise wires with a lenght of 1/16 Lambda connected to the 49:1 "ground" post and laid on ground, in theory the HW won't need it, in practice the wires will improve the r...

A paper describing a simple, cheap antenna which is also stealth and will allow to work all HF https://www.qsotoday.com/uploads/2/4/5/0/24502639/kd3cr_presentation_august_expo.pdf sure, it isn't a "beam" it's a compromise antenna, but then if one hasn't the luxury of having plenty of space...

well... the EFRW is not "random" as you already wrote, it's more an "aperiodic" or "travelling wave" kind of antenna, at any rate, the first link I posted, carries some concepts and facts which need to be digested to get a good grip on EFRW, so, if you want, take your t...

Nothing particular, just a pair of links discussing the "random" wire antennas https://f5npv.wordpress.com/endfed-random-wire-efrw-antenna/ https://k8ua.com/2019/10/my-lid-moment-or-how-not-to-deploy-your-random-wire/ the first one is pretty long, but I believe it's worth reading with some...

I've always loved simple antennas and the dipole is one of the most common and simple ones; for such a reason time ago I started investigating about ways to maximize the performances of the dipole and, time ago, found a paper from Jari Perkiömäki (OH6BG) which explains how, using some optimal (yet m...