Seems to be a lot of people wading in with absolute authority on what is an "it depends" topic. What it depends upon is ground conductivity, for the most part. There was significant quantitative work
We're getting wrapped around the axle here, fellas. Several good points have been made...and for the sake of sanity, I'd like to echo them. 1) Earth with good conductivity is better than earth with p
With due respect, Yuri....reflection gain exists for grazing incidence moonbounce signals. There is an additive behavior here, which recovers part of the signal which would be below the horizon, but
I don't disagree that being on the ocean makes verticals play wonderfully. Makes most antennas play better, in fact. What happens, though, is not gain. At some angles, you have less signal, not more.
I've DF'd in on several of these from my sailboat. They're marine nav beacons in the 190-220 KHz band. Just follow the null in the fog, and you, too, can run into that pier! N2EA <snip> In covering s
K1TTT, speaks the truth: <snip> "First, there is no such thing as an rf ground. (time to put on the asbestos underware!) Any RF you generate is looking for a path back to where it came from. The most
Chaque un a son gout. But it seems neither side in this debate is listening to the other. Hopefully this sheds more light than heat. A properly guyed tower will withstand hurricane force winds. There
Oh, come now.....and what was the cause of THIS failure? <snip> "Meanwhile, several thousand listeners tuned in to WDCB 90.0 GM at Glenellyn, Illinois, were left with nothing but static for a after w
My last post referenced the W1CW tower, as an example of a well done Florida installation. Turns out that Bob White's son, who presented the Dayton paper, is none other than Jim White, W4OJ. As reade
For those of you with foldover/tiltover towers, who struggle with skewering the earth with your elements, and getting the boom on the mast... I designed a hinged bracket system, which keeps my beam h
First, can someone describe the K7LXC 'double lanyard system' for safety lines? I suspect it may be obvious, but often lengths are critical, and this may be helpful. Secondly, I climb, but I like cra
Jim: Maybe I'm missing something....but I see 4500 lbs of bending moment on the mast, where it passes through the house, and about 1100 lbs of resisting force where the mast sits on the floor of the
This thread is interesting....I'm in process of designing a new antenna/tower system for Summer installation. Need to decide between an LPDA and ham-band Yagi. With respect to LPDA's, I had a Cushcra
with a f/b ratio that is well less than 20dB. Azimuth beamwidth is on the order of 85 degrees. By comparison, a 'spitfire' array.... 4 sloping dipoles, folded back toward the base from the feedpoint
Seems I mis-applied the name which YCCC is using to describe a bent, sloping dipole array. A Spitfire, it's not. The system I contemplate consists of four sloping dipoles. The hoist for these is 1/2
Thanks to all who provided the YCCC link for spitfire array info. Turns out to be mis-identified by me. What I'm contemplating is the K8UR Sloping Dipoles Square Array, as described by ON4UN, in Low
For benefit of those who recommended I look hard at this array....the W1FV, K1VR (FVR) Spitfire would make it possible to get directional gain from a 75-80' pole, on 80 meters. I haven't discounted t
Folks, I've lost track of who suggested this...but I would like to hear from anyone who has modelled or actually installed two log periodic arrays, stacked, but NOT parallel. That is, by tilting the
For the record, the idea came via Don Havlicek [mailto:n8de@thepoint.net] who told me about Dr. Duhamel of Collins Radio .. the possessor of the patent on LP's. With appologies to Don, for losing his