Model 1, is my .625w 4 x 104" at 36' model that is not isolated (ISO)
View attachment 18907
Model 1, is a .625 wave antenna model with 4x104" radials and the antenna is not isolated at the mast/mount bracket. Notice the heavy currents (in red) noted at the top of the mast. These currents are heavy and are in-phase with the bottom of the radiator and out of phase with the working part 1/2 wave at the top of the antenna.
For me this indicates a sure sign that there will likely be...
.625w model with mast isolated (ISO) vs. not ISO.
View attachment 18907
Model 1, is a .625 wave antenna model with 4x104" radials and the antenna is not isolated at the mast/mount bracket. Notice the heavy currents (in red) noted at the top of the mast. These currents are heavy and are in-phase with the bottom of the radiator and out of phase with the working part 1/2 wave at the top of the antenna.
For me this indicates a sure sign that there will likely be...
.625w model with mast isolated (ISO) vs. not ISO.