I have never had an issue with this on any tower I have shunt fed that had a Yagi at the top with insulated elements, but then again my insulators are probably a lot better than the average ones used
I once fed a tower with a klm 40m beam with an insulated DE on it with and the coax taped to the boom. The insulation on the coax broke down and the coax caught fire. I grounded the DE. Problem solve
Stan - For about 8 years, up until this past spring, my shunt fed tower for 160 had a KT34XA (insulated elements, later upgraded to a KT36XA same insulated elements) at the top and I never experience
One of the factors for arc over is the diameter of the tower and top support pipe diameter & length. A really FAT 1/4 wave tower may have 1000 ohms at the top, while a skinny tower would have much mo
Understanding what Bruce has posted would support the theory that a cage feed tower is indeed fatter with a lower impedance and thus less proclivity to arc over on the insulated elements. Herb Schoen
Good question, Stan. I've wondered the same thing. I have a 64' self-standing tower with a 3 el Steppir on it (insulated elements) and a 40m linear loaded dipole (also insulated) on top of that. I've
Concerning voltage breakdowns using yagi-loaded towers on 160 meters... I have heard stories of arcing to beat the band, that included a fair amount of destruction. I have heard stories of nothing ne
On Thu,12/18/2014 4:59 PM, Ralph Parker wrote: I have a 64' self-standing tower with a 3 el Steppir on it (insulated elements) and a 40m linear loaded dipole (also insulated) on top of that. I've wor
You can model this two ways: 1.) As a very high impedance load between the elements and the boom and look at the load data to see voltage between the boom and elements 2.) With a source between the e