This is one of the characteristics of the driven or single director Delta Loop, an omni pattern. However, that pattern is made up of a horizontally polarized component that is directional perpendicul
It's also best practice to thread the wire through teflon tubing before winding, as the thermalese wire insulation is not enough to handle the high voltages at moderate power levels with many antenna
No sure what you mean by "radiated" electrons. An antenna does not emit or radiate electrons. The electrons are flowing inside the conductive materials of the antenna (eg, elements, balun/unun, tranm
Guy has a good analogy. BB: the "field" consists entirely of energy; there is no mass (weight resulting from gravity) to a field. The field does contain "ripples" as Guy says, with characteristics of
As a marketing professional, I feel compelled to throw in my 2 cents worth The name of this reflector is misleading. Tony's posting is a good example of what results, and I'll bet there are dozens of
I just thought of another suggested partial solution to the problem: (4) Have every message reflected by the list server add a boilerplate message at the top explaining the posting rules (as some oth
It's been a *long* time since I signed up and possibly read that blurb. Result: forgot that. Perhaps others have, too. I still maintain that antenna + Hardware contraction "antennaware" is misleading
Patents protect the owner from competition. Ie, if your intent is to use patented ideas/inventions for monetary gain but selling the antennas you built using them, then you could be potentially infri
Free: MMANA-GAL modeling http://mmhamsoft.amateur-radio.ca/mmana/ It's somewhat limited in what all it can do, but should be more than sufficient for what you are looking for...plus it has one of the
Likley not "saturation", but it is obviously thermal induced problem (heating). I would say that you have a balun wire heating problem *except* for your mention of the problem happening more when the
I respectfully disagree with dismissal of moisture as a cause. It normally takes months for coax to dry out (assuming low humidity) when moisture has seeped into it (and when it does, it often goes s
This attempt is virtually similar to a multiband dipole, where 2 or more band elements are separated by mere inches. Of course, you have to expect pattern & resonance changes from that and adjust len
I personally prefer the Super Loop over the dipole...it's quieter and has more gain. It still needs an antenna tuner. If you do 450 ohm with a dipole, you should consider a G5RV design instead, which
Gary's correct that radials make a tremendous difference in vertical antenna performance. Typically, verticals have a lower take-off angle, which is advantageous for HF DX work. However, some horizon
I already tried myself using the transmission line feature in EZNEC for that "stub", but found that it did not at all accurately model the real-world antenna. The "stub", "trap", "phaser", or whateve
Davis RF makes a low-loss LMR-like coax made for direct burial, and can be bought at a very good price. I've been very pleased with its performance & reliability for HF. I used the 18HT as a teenager
I agree, Guy. Having learning & using 3 modeling programs with various NEC engines, and after sitting down with an engineer friend who has one of those expensive modeling programs ($1000s), the "comp
What bands are you interested in? Hello there, I have moved to Cologne in Germany and want to be back on the air, but i'm living in a Apartment and cant install good yagis, so I decided to be on the
When I haven't had time or proper materials to wind my own, I've used Balun Designs www.balundesigns.com because (1) he's significantly less expensive than his competitors, (2) he's a student of and
John, I agree with Terry that you'll need a true "current" balun, a Ruthroff design may also be possible, depending on answers to Terry's questions PLUS (1) what band(s) are you interested in and (2)