measuring your feedline
last updated 25 March 2025.
Sometimes we need to actually measure the characteristics of our feedlines. This might be because we want to see if an old piece is still good, or we have been given an unidentified piece of cable, or we want to use a piece of speaker cable or power cord for a feedline that was never intended or specified for RF use.
measuring characteristic impedance
factors that affect feedline loss
adventures with small feedlines : comparative measurements on small cables
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TLDetails transmission line calculator program from AC6LA