Search found 149 matches
- Mon Jul 15, 2024 10:39 am
- Forum: General Discussion
- Topic: Squeezing 9dB from a dipole
- Replies: 2
- Views: 1025
Re: Squeezing 9dB from a dipole
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...
- Fri Jul 12, 2024 12:08 pm
- Forum: Field Kits and Reports
- Topic: QRPp outing
- Replies: 6
- Views: 1498
Re: QRPp outing
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...
- Thu Jul 11, 2024 6:56 am
- Forum: Questions & Advice
- Topic: HF in an HOA
- Replies: 4
- Views: 1005
Re: HF in an HOA
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...
- Wed Jul 10, 2024 7:14 am
- Forum: Questions & Advice
- Topic: HF in an HOA
- Replies: 4
- Views: 1005
Re: HF in an HOA
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"...
- Tue Jul 09, 2024 8:50 pm
- Forum: Field Kits and Reports
- Topic: QRPp outing
- Replies: 6
- Views: 1498
- Tue Jul 09, 2024 8:23 am
- Forum: Field Kits and Reports
- Topic: QRPp outing
- Replies: 6
- Views: 1498
Re: QRPp outing
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...
- Wed Jul 03, 2024 7:20 am
- Forum: Questions & Advice
- Topic: HF in an HOA
- Replies: 4
- Views: 1005
HF in an HOA
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...
- Fri Jun 21, 2024 2:30 pm
- Forum: General Discussion
- Topic: EFRW: some notes
- Replies: 3
- Views: 946
Re: EFRW: some notes
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...
- Wed Jun 19, 2024 2:04 pm
- Forum: General Discussion
- Topic: EFRW: some notes
- Replies: 3
- Views: 946
EFRW: some notes
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...
- Fri May 17, 2024 12:29 pm
- Forum: General Discussion
- Topic: Squeezing 9dB from a dipole
- Replies: 2
- Views: 1025
Squeezing 9dB from a dipole
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...