The coupling was from the radial field, which ran underneath the metal fence, not from the vertical conductor. The height of the vertical's feedpoint, given buried radials running under the fence, wo
While this thread on linguistics has mostly disappeared locally by way of my delete key, it somehow has managed to persevere on a listserve dedicated to towers and antennas. Perhaps those who seem so
Pattern, feed, etc all depend on the overall length of the inverted L compared to the wavelength of the frequency in use. For instance, an inverted L 65 feet up and 65 feet out can be used: a) on 160
The tower resonance is the tower resonance, period. Nothing changes that. That is a frequency at which RF current flows most easily in the tower/antenna combo. Everything else is forcing energy into
On something like a C31XR, just outright grounding of the 20m reflector and director will keep the others from breaking down. The arcing occurs because the gap between the boom and element is the "en
If you care about 40 meters, the C4S will walk all over the vertical. 52 is a wee bit low, but it is still high enough to outperform any single vertical. BTW, the F12 linear loaded stuff is very sens
In urban areas, I've always found quite higher reception of man-made noise on verticals, for what ever reason. And unless the vertical is over an extended flat copper roof (block of same height row h
Then there is this business of just HOW you DEFINE an Inv El. Take an antenna that is fed at the ground, against adequate ground, up 67' and out 67' or thereabouts. Well, that is a 1/4 wave of wire o
Loop the big grip on the lower end of the philly through the big grip on the upper end of the ehs. Nothing else needed. insulator, http://www.mscomputer.com take an additional 5 percent off
Although I have seen big grips looped without anything, and no apparent ill effects, on the PLP web page they show a minimum radius they want. Even some thimbles would not do if you take their page s
The ground is a reflector, but it is a lossy reflector. Best 75 degree numbers I can get for a dipole using earth as reflector are around 6 or 7 dbi. I'm not sure what figures you were using for an N
Noticed in the 2 element below, I didn't specify which wire was fed. The 47.7 wire takes the power. The 7.4 wire is reflector only. reflector try long,
M2 sells an upgrade kit which supposedly is the cat's meow. It improves gain, F/B and makes certain physical improvements. I would seriously consider it. This upgrades the 34 to the replacement model
Noll, W9RN, posed the original question, not I. I support the upgrade. 73 changes (mechanical) which can affect trap resonant frequencies. A call to Mike at M2 will give you all the info you need. if
Not to minimize your friend's death, not at all. Speaking technically, this may mean that stretchy rope should not be used with severe loads, or with heavy loads on pulleys using friction or sleeve b
1) The design is not bad. Too many of them out there working FB for that. 2) You say relays, assuming you really mean more than one exhibits the problem. It is unlikely that six relays are all bad wi
You might be 4:1 at the antenna as well. You would do considerably better on 18 MHz to just cut an 18 MHz dipole and string it 20 feet up in the air. Signals are quite strong on 17 meters. tower.
Actually NOT. If you model it you will see that the pattern 3 db points on elevation are 15 degrees through 75 degrees with a very broad maximum around 40 degrees. Straight up is a minimum on the pat