I ordered some slitted tubing from DXE and the finish on the end is very nice; perfectly square even slots all around; no burrs. I'm sure the prepackaged verticals are the same, but I don't have one
How can it be claimed as multiband? Look, the 43 foot vertical craze is a bunch of BS, and there are no manufacturers, in my opinion, who are innocent of putting marketing above good antenna enginee
In what range of takeoff angles? I get something like @6 degrees elevation, a single quarter wave vertical with negligible ground loss looking out on saltwater beats a 90 foot high dipole by 3dB, pr
I did. I use it every time I'm on 40m. If it had zero current flowing into the base, no power would be radiated :-) I'll have to check again to make sure, but I'm pretty sure disconnecting the groun
EZNEC is not wrong just because it doesn't take into account propagation. EZNEC tells you what the far field gain of various antennas is at various elevation angles. That's it. You need other tools
Anything that's not elliptically/circularly polarized is just linearly polarized, and the "ratio" of vertical to horizontal response just depends on the tilt of the elements with respect to horizont
Polarization rotation always seems fast enough that it's hard to keep up. Technically, it could matter, but it's very possible for it to cycle a time or two while you call. If the rotation is slow,
About a month ago (4 March), I posted about a newly hatched business plan of mine and referred to a cage dipole that sold for $350 and had 5dBd claimed gain. There was possibly an implication in my p
Whoops, probably did it again. I'm bad at this tiptoeing around in forums stuff. Please read this as "It is my opinion that" any such antenna is impossible. Apologies again. 73 Dan __________________
exhibit a positive dBd number. And many do. There is no snake oil in that. Really? Do you know of a product that would allow me to mount my comparison dipole in free space for tests? To use dBd to r
The only ones? What about dBq ... vs. quad loop? If dBd just means dBi + 2.1dB, it is completely trivial and should be never used again. I don't think it means that, or at least that is not how I wo
According to the website, that will not work: "Okay those with antenna modeling program will differ because their program will not allow all the parameters to be taken into account...So with actual
polarization for HF antennas close to the ground is pretty funky and has Not to mention the fact that you don't have to make much of a rotation to get a lot of improvement due to the strong angular
situations, which is what most guys have. Alternating-impedance series-section transformers like the "Twelfth Wave" transformer can be pretty broad. http://www.tuc.nrao.edu/~demerson/twelfth/twelfth
It's either luck or maybe he would just have a much better signal if he didn't do that. There is no reason why that should work well. I get good signal reports out of Europe on 160m and my current b
Kip, Most hams use open wire line to feed antennas of no particular impedance. Very few people have antennas that are resonant and 450 ohm input resistance, but lots of people use 450 ohm window lin
Here's one online: http://w5jgv.com/tree_antenna/index.htm _______________________________________________ _______________________________________________ TowerTalk mailing list TowerTalk@contesting
Like Jerry said... Delete tree. Compare. But then you'd have to find out the bad news about how poorly your tree was working... _______________________________________________ _______________________
Baluns don't have power ratings. They have voltage, current, and temperature ratings. But the ham market demands a power rating and so we get used to talking in power ratings, even though it doesn't
By the way, the same can be said for tuners. _______________________________________________ _______________________________________________ TowerTalk mailing list TowerTalk@contesting.com http://li