These are Simple Crystal radio kits ( Xtal Radio Kits ) and are easy to build. These Crystal Radio Receivers tune the AM Radio Band.
Crystal Radio Kit 3 includes:
- 1 – 1N34A Germanium Diode (Crystal Diode Detector)
- 1 – 47K resistor
- 1 – .001 Capacitor
- 1 – 680uh Loopstick Antenna Coil Round Rod
- 1 – Plastic Variable Capacitor 60pf /141pf
- 1 – Knob and Shaft
- 1 – Ceramic Earphone (Piezoelectric Earphone , Crystal Earphone)
Crystal Radio Kit 3 has no taps on it and uses the round rod ferrite coil. Since most people will not be using an antenna around 100 ft long this radio kit has no taps on the coil for the extra long antenna.
The Simple Crystal Radio Set Kits ( Xtal Radio Set Kits ) require some soldering of the fine wires from the Ferrite Loopstick Antenna Coil the the variable capacitor. So Adult Supervision is advised for younger builders.
Learning how to build a Crystal Radio Receiver is a great way for anyone to get started in the electronic field. Great for Science Fair Projects and Boy Scout projects. The Simple Crystal Diode Radio Sets we have for sale are a fun way for the family to spend time together. As a child I made Crystal Radio Receivers out of things I find in old scrapped Radios and TVs. Most had no tuning capacitors. I had to tune in stations by sliding a ferrite rod in and out of the tuning coil. I would spend days trying different items to use as a detector instead of a diode, some worked but most did not. Anyway I had fun learning. Buy one of our Crystal Radio Kits for hours of fun and learning.
All of the Crystal Radio Kits are the same except for the coil. Kit #1 has one tap on the bottom of the coil for connecting a antenna no need to wrap wire around the coil for a antenna connection. The other Simple Crystal Radio Kit #2 has a tap towards the bottom and a center tap. The bottom connection is for the antenna and the Center connection gives better selectivity at a slight loss in volume. The top connection gives most volume but selectivity is reduced a little. Crystal Radio Kit #3 has no taps on the coil.
Dave Farrell wrote a Power Point Presentation for his Elementary School Class on Crystal Radios based on the Crystal Radio Kit 1. The presentation contains come theory and assembly of their project. Building A Crystal Radio.