Ring Variometer Crystal Radio

Create a crystal radio with a half ferrite ring to tune the frequency instead of a variable capacitor which is hard to find.

Check out my blog for detail instructions of how to download the 3D models to print out the parts, and where to order the parts.
http://billydiy.blogspot.com/2020/10/designed-ring-variometer-crystal-radio.html

Checkout my 3 part video series of the project to create a Ring Variometer Crystal radio
Part 1 Introduction and demo - https://youtu.be/tg6rbDvBY94
Part 2 The 3D design - https://youtu.be/P5OaoGvIErU
Part 3 How to make it - https://youtu.be/u2V1u8saGVo