Crystal Set

Crystal Sets Revisited

 Well, my original crystal set post had some experimentation on it, and I have done a little more recently due to wanting my daughters Cub Group to build one as an experiment.  The biggest hurdle was getting the cost down to a resonable figure - otherwise the project was dead in the water.

Spider Coil Calculator for Radio Applications - Python Code

In my crystal set post I use spider coils, because they are easy to make (my 8yo daughter wound one all by herself), and because they have better Q than a TPR coil (Toilet Paper Roll - common type used in basic crystal sets).

Crystal Sets

s a child, my father got me into building my first crystal set.  I don't fully recall the details, but I seem to recall it was a kitset and I was in Nelson when I built it - If I remember I'll ask him.  What I do remember is building a few of them, including one that fitted inside a tic-tac container and another that had no tuning cap, just an icecream stick with a screw through the end that scratched through to vary the coil windings in use.