Can you suggest me effective methods to measure the harmonics rate in the transmission
When I started with ham radio there was only one person I knew of with a spectrum analyser - everyone else used a wavemeter https://en.wikipedia.org/wiki/Absorption_wavemeter . I made my own wavemeter which seemed to satisfy the authorities when I was inspected. It consisted of a loop antenna, variable capacitor and diode to which I connected my multimeter.
1. how to calibrate it.. like how should i calculate the area of the inductor, inductance, gauge of wire etc. for a particular frequency... ?