EnergyGuy LLC
Amateur Radio • Electronics • Engineering
Main Navigation
Home
Antenna Library
Antenna Gear
Overview
Theory
Design Calculations
EZNEC / NEC Modeling
Winding Tables
3D Printed Parts
Theory
Date: 2026-01-13
Common-mode chokes block RF on the outside of coax shield.
High impedance across the band reduces RFI and pattern distortion.