Predict antenna length
Calculate a starting element length from frequency before using a calculator result blindly.
No licence requiredAntennas: measure, predict, improve
Predict resonance, measure SWR or impedance, explain the difference and tune the antenna.
Audiencenewcomer
Estimated time150 min
Steps4
Path
Measure resonance and SWR
Measure the antenna and note resonance, resistance and reactance if available.
No licence requiredExplain the difference
List plausible causes for the difference between predicted and measured behaviour.
No licence requiredChange one variable
Change only one physical variable, remeasure and decide whether the result supports your hypothesis.
No licence required