How to make a coil for crystal radios that has taps on it. The coil is useful for many other things too, but this one is designed for the crystal radio I show how to make with step-by-step instructions in the video at the link below. This is just one way to wind the coil. This has 25 turns wound on the primary coil and 90 turns on the secondary coil with tape at every 10th winding.
See also:
Step-by-Step How to Make a Crystal Radio video:
http://youtu.be/VqdcU9ULAlA
Crystal Radio Troubleshooting and Tips video:
http://youtu.be/HZZmKZJrIW0
- http://rimstar.org