We all know how much Bob likes a spreadsheet, so here’s one that may be of interest to the club.
I have encountered the problems of trying to adjust antennas to the resonant frequency,
I decided to apply my maths skills and have come up with the attached.
Basically, you enter a number of values for;
Frequency you want to be resonant at and if your antenna is ¼, ½ or whatever
You then take some vswr readings, and from there, it calculates the amount you need to increase, or decrease the antenna length.
Antenna Length Calc (10.4 KB) 10 Downloads