Why does my RC transmitter/receiver work after removing this magnet? Answered
The RC parts I've been tinkering with have a small electromagnetic coil. The radio frequency can be tuned by using a screwdriver to raise or lower the magnetic core.
What puzzles me is that the transmitter and receiver will still work if the magnetic core is removed from both parts. This seems like an important component, so why does it work without it? What's happening to the radio frequency?
Bonus question: What's the purpose of the capacitor on the receiver board?
For context, I'm working on an RC car project for kids and I'm trying to figure out how to diversify the radio frequencies so more kids can operate their cars at the same time.
Thanks for your help!