My 160 meter shunt fed tower project is essentially done. However, I have an issue with the 80 meter antennas hung off that tower. In a nutshell, the current baluns (ferrite beads) feeding these ante
My 160 meter shunt fed tower project is essentially done. However, I have an issue with the 80 meter antennas hung off that tower. In a nutshell, the current baluns (ferrite beads) feeding these ante
On 12/6/2012 12:39 PM, Steve London wrote: My 160 meter shunt fed tower project is essentially done. However, I have an issue with the 80 meter antennas hung off that tower. In a nutshell, the curren
I'm with Tom on this one. This is not a noise suppression problem The placement up high on the tower means that the common mode path is nearer a voltage node than a current node and we are talking ab
Right. 5K Ohms is a good rule of thumb for choking Z to prevent noise coupling from feedline to antenna, and if the antenna is reasonably close to balance, is also enough from the point of view of di
In this case the original poster has a two-dipole 80-meter antenna attached high on a tower. He needs to isolate common mode 160 meter tower antenna currents and voltages from that array. 1.) He cle
That's pretty close. It's a 110 foot tower, with a 4 element 40 (linear loaded) on top, and a KT-36XA at 75 feet. These two antennas have their feedlines isolated from the tower, and the feed methods