Radio Frequency (RF) & Wireless Design

I just posted a model for an adjustable feedline impedance based upon my previous thread of why a wire feedline is better than a coax feedline for direct attachment of wire antennas, especially in the High Frequency (HF) band and lower frequencies.

Here is the link and I will add additional information over the course of the day :

Grabcad model

Wire Dipole Antenna with Adjustable Ladder Feed Line

This is a model of a Half-Wavelength Wire Dipole Antenna with Adjustable Ladder Feed Line that is used to experiment with various wire feedline gaps that provide different feedline input impedances by changing the wire gap in 1/2 inch increments as shown in the table.

Please be sure to see my other post titled "Why the use of ladder lines (twin-lead) is the better way to feed an HF dipole antenna than coax" for many good links on wire feed lines for dipole antennas !