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Low loss Japanese coaxial cable

about having as good an antenna system as you can manage to get the best out of six metres
post 07 Nov 2020

Antenna Feed Lines Links


Why Ladder Line?
RG-213 shop-bought at considerable expense; radiates RF when mismatched, typical loss: 4.8dB / 100m @ 30MHz. Ladder line: Easily constructed for a few cents per meter; radiates very little RF even when severely mismatched; typical loss: 0.33dB / 100m @ 30MHz

A Transmission line calculator,W9CF
This transmission line calculator calculates the impedance at input and attenuation of a given transmission line once terminated with the given load

Coax Cable Loss calculator
Coaxial Cable Attenuation Loss Calculator in dB

Coax Impedance Calculator
Coaxial Cable Impedance Calculator allows you to enter the Outer Diameter Dielectric width, Inner conductor Diameter width and either the Dielectric Constant

Transmission Lines calculator
Calculates the resistance, inductance and capacitance per unit length of common low-loss transmission line configurations

Quarter Wave Stub Impedance Calculator
A quarter wave transformer is used to match two transmission lines with different impedances