Crystal Set 1

Posted on Feb 5, 2014

The P-C70-A from Antique Electronics Supply works just as well and maybe a little better than the coils you can wind. Winding coils is an interesting experiment and you may want to do it just for the fun of it. If you would rather skip all the fun you can. An additional circuit has been added below. It`s really not that hard and it is guaranteed to be painless. I have devised a method in which you use Double Stick (stickem on both sides)

Crystal Set 1
Click here to download the full size of the above Circuit.

Scotch Tape to hold the wire in place while you wind the coil. One of the most frustrating things about winding a coil is what happens when you let go of it. The double stick tape prevents this from happening. To learn how to wind your own coils click here. If you don`t have a variable capacitor you will need to buy one. If you would rather not wind your own coils there are ferrite antennas and antenna coils for sail. Click here to learn what to buy and where to buy it. Another source is to take a transistor radio apart to salvage the tuning capacitor and ferrite antenna. It`s kind of fun tearing up one of those disgusting little things and you might learn a thing or two in the process. The parts you get are of limited usefulness which is why I really don`t recommend it. If you have the time and the inclination give it a try. Just click here. If you wound your own coil here is how to connect it. The double dashed line is a symbol indicating that the coils are coupled magnetically. The relative position of the coils in the diagram has no relationship to the actual physical position of the coil windings. The antenna connects to the white wire and the earth ground connects to the black wire. The variable capacitor is connected to the large green winding as follows. The ground terminal of the capacitor connects to the yellow wire and the terminal to the stationary part goes to the green wire. The blue wire goes to the crystal...

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