[TowerTalk] UL listed protector for ladder line

[Jim Brown]

On 6/16/2025 6:13 PM, john at kk9a.com wrote:
>   A fan dipole or the loaded dipole that K9YC suggested would have a consistent pattern with no deep nulls and ~50 ohm impedance on the designed bands.

As I'm sure you know, due to coupling of the ground reflection with the 
antenna, the feedpoint Z of resonant half-wave dipoles varies with their 
height and soil conductivity.

My 20M loaded to 40M design can provide a pretty decent match on both 
bands to 50 or 75 ohm coax, assuming soil typical of the CA counties to 
which most expeditions would be traveling at the modest mounting heights 
of ad hoc setups.

73, Jim K9YC