You do if you want the triangular array perform the way it is supposed to work with WX0B stackmatch. It can work as two driven elements fed in phase with third as reflector (frequency shifted by open
based on the difference is height and other weird propagation effects sure make a 4 stack a really fun antenna to play with. Unfortunately MOST of the fun and games can be seen only at the top of the
recommend guying it. Self supporting towers are actually designed that way with no need for guys. Guying a self supporter will prevent it from twisting like it wants to by design and could actually
On the VK4VKD site: http://homepages.ihug.com.au/~aeitower/ we read... *_WARNING * *_I HAVE BEEN INFORMED THAT SOMEONE IN THE USA IS ADVERTISING THAT THEY ARE BUILDING THE "ONE MAN TOWER" UNDER LICEN
*_WARNING * *_I HAVE BEEN INFORMED THAT SOMEONE IN THE USA IS ADVERTISING THAT THEY ARE BUILDING THE "ONE MAN TOWER" UNDER LICENCE - THIS IS NOT CORRECT - NO AGREEMENTS HAVE BEEN MADE WITH ANY INDIVI
be a deal killer to have a motor die in the middle. << They use stepping motors. They are the best engines around, no brushes, they are precise for positioning, can be used as a brakes and very relia
sure. Two seconds of low level hash and then 1:1 VSWR, boy am I glad that I dumped my old fashioned, fixed tuned, beam.<< I wonder where is hash coming from. Stepping motors do not have brushes, they
I am surprised that they would live with noise generated by the drive system. There should be no capacitive coupling between windings and elements. Windings are completely enclosed. By using shielded
run of the mill steppers (with decent temperature ranges, etc.) are probably around $50, brand new, in big quantities. Shielded steppers with the fancy connectors are more like $500 or $1000. Fluidmo
the time researching filter designs, trying various approaches, tuning the stubs, etc.. Figure your time at a cheap $50/hr, take the parts cost, using components purchased new from catalogs, and doub
Way back there was a discussion about knots and some marine or knot web sites were mentioned. I tried to avoid using tag lines while lifting antennas. I was blessed to have Bertha, no guy wires and h
73 de Jim Smith VE7FO<< Rather than analyzing your particular situation (more info needed), here are some general observations: 1. If you have strong local BC or other signals, some antenna analyzer
variable C in series so I could resonate the antenna anywhere in the band. Maybe even motorize it. From what you say, maybe the MkV tuner will be good enough.<< That is good way to get more out of lo
states that these devices do not work as the manufacturers claim.<< Welcome to the lawyers world! If you had the threat of law suit and you are "expert" and there was a doubt as how exactly "thing" w
Do you have data contrary to that? Is there anybody who experienced more lightning strikes after putting up bigger antenna installations? Just because "professionals" did not exprience it (didn't hav
towers didn't get hit then why do power companies spend money trying to prevent damage from strokes to power lines. HV power lines are larger than any ham structures, within the same range of heights
installation that had just been hit, I decided to never have anything above the yagi except maybe 5' of mast for the truss. In 13 years, I have never had a hit. << Another vote for "Yuri's theory" of
Inquirer - The journal of the Committee for the Scientific Investigation of Claims of the Paranormal (CSICOP).<< Looks like we have quite a few graduates of W8JI "guru" "knowitall" academy If you guy
tribander help or hurt this "capacitor plate" theory?<< The "rules" seem to be like this: If you want to create "umbrella lightning repellent" protection situation, the tower should be as high as pos
have all observed a storm cell moving towards us that was generating lots of strikes. As the cell neared our towers the lightning stopped and the guy wires started crackling and popping. As the cell