The Magic Of Passive Inductance Demonstrated

Thomas Ratcliff
Member
Joined: 2020-01-10 00:17:30
2020-01-10 18:28:14

The following video is a great example of passive inductance using a tunable loop antenna to boost AM radio stations on a portable radio. The loop is simply a 9 inch diameter coil of enamel coated magnet wire connected to an air variable tuning capacitor. The loop uses no power but when you tune an AM radio to a weak station, place the loop next to the radio, then tune it to resonance using the variable capacitor, almost like magic the weak signal is boosted to a listenable level. See this interesting video! https://www.youtube.com/watch?v=Q9798hNA8j4