Useful tools

[dipole_calculator]

 

Open Wire Feeder Impedance Calculator

Coax and ERP calculators

ohms-law-calculator

GPS LOCATION IN VARIOUS FORMS

 

https://www.electronics-notes.com/articles/antennas-propagation/rf-feeders-transmission-lines/coaxial-cable-velocity-factor.php

http://www.vk2zay.net/calculators/velocityFactor.php  easy

https://www.translatorscafe.com/unit-converter/fr-FR/calculator/coaxial-cable/

 http://www.m5bxb.com/coaxlengthcalc.htm