This mount is made to mount parabolas and the like. A swinging gate would not have but a few degrees more than 180 movement about the axis. OK if that is what you need. 73, Guy To: <towertalk@contest
Need to remember that the Trylon corners are not exactly vertical (go in inch and a half each section). Also the vertical pieces are 120 degree rounded corner channel material, not tubes as on Rohn 2
NO, NO, NO... The channel then would be no stronger than the pipe, and maybe not even that. And you would have set a pre-stressed bend giving a collapse the place to start where you drew the metal in
Actually, they're not working without a "ground". You still have to have a current "sink" for the current on the shield. End-fed half waves are common enough. Feeding at the end means a network to fe
Over-noaloxing anything will cause troubles. Noalox is NOT a preferred conduction path. If you overdo it, it will harden into a resistive strata and cause trouble down the line. Noalox is supposed to
Tuning it down to nothing does not necessarily mean better performance. For some of the tuners, particularly some of the smaller ones, no reflected power may mean that the swr is being eliminated by
Working at 90 feet on Rohn 25 with guys at 35 and 68 feet was just plain nasty. Took every bit of mental teeth gritting I could muster to convince myself I was not swinging into the ground. Wasn't an
A direct or close lightning strike can VAPORIZE solder. The options are Cadweld or robust mechanical clamping. The latter must be periodically inspected. The solder is useless and can defeat a copper
Very straightforward. 160: Grounding is very poor for the needs and the ground connection is providing a very lossy unvarying addition to the probable natural 25 ohm impedance of the L. Low band shor
Rotating the beam does not always show much of a change. If all three guy wires are equally rf ugly, there may be no change at all. There are always at least two coupled no matter which way beam is t
If you don't keep the + to the same side you will reverse the transmitted phase on the antenna with the reversed sign relative to the rest of the stack. This will put the power into very high angle r
Once an antenna has been assembled using a PVRC mount, what you describe is fairly common. It allows the mount per se to be reused for other jobs. It also reduces the leverage the antenna has to pull
One 15/40 combination that seems to work in proximity is when the 40 is made of Force 12 folded elements (the "N" series of F12 40m beams). The folding causes the secondary resonance of the 40 N elem
Turning 90 degrees does not always work out, because sometimes booms can behave as dipoles with end loading and can weird the patterns just as much running the antennas in-line. 73, Guy. by beam. jus
The linear loading allows the 7 MHz length to be SHORTER tip-to-tip. It is an easy exercise on EZNEC (or ...) to show the movement of secondary resonances when a 7 MHz element is folded. When you mod
-- Original Message -- From: "david jordan" <wa3gin@erols.com> Noise from point source such as a tower or building and percepitation static created when dropplets of rain or snow flakes that are char
Not being able to reply for a while does not mean I agree. There are some repeatable observations that need to be taken into account, and in this thread and the others from it, these observations do
the noise can start well before the rain or snow start, and indeed can happen when there is no rain or snow at all in the area... and can continue well after the rain or snow stop. Personally I've ne
I'm not sure the dielectric properties of such a poor conductor will mean much. The dielectric of something touching a conductor is another matter, but these are not "close" and the field around cond