Organize and Share your Electronics the way you want. Sign-Up for a free account now. It takes only 30 seconds!

Old Time Crystal Radio

Old Time Crystal Radio

This little project is a sure interest grabber with students of electronics of any age. Recommended for Boy Scout Merit Badge and Cub Scout Activity for requirements.
It does not require a great amount of skill, but a little application will produce a good basic radio receiver. Construction is fairly simple. This radio DOES NOT require batteries to operate; rather, it uses simple electrical principles to power itself. It does not include the Double Headset shown but does include a Crystal Earphone. Tuning is done by rubbing a piece of metal (large paper clip included in kit) across the coil of wire which is wrapped around a toilet paper tube.

The best antenna for this radio is simply a really long wire, mounted as high above the ground as you can make it. Though sometimes just connecting the antenna lead to a bed spring can bring surprising results, especially in city areas, or close in to a transmitter station in the country.

List of Parts provided in the CRYSTAL RADIO SET #8893

8 OF BRASS FURNITURE THUMB TACKS

70′ OF COPPER MAGNET WIRE #30

1 OF LARGE PAPER CLIP

1 PIECES OF SOLID 4″ HOOKUP WIRE

1 OF 470 PFD DISC CAPACITOR

1 OF 0.01 MFD DISC CAPACITOR

1 OF GERMANIUM DIODE

1 CRYSTAL EARPHONE WITH WIRES

1 Complete set of INSTRUCTIONS and DIAGRAMS

1 COMPONENT PLACEMENT DIAGRAM TO GLUE TO YOUR WOOD BASE

You need to supply a discarded cardboard tube from a toilet paper roll, an 8″ x 5″ block of Pine wood, or chipboard to use as base, and some radio cement (clear glue) to hold the coil of wire in place on the toilet paper tube.

Visit Here for more.

 

More Articles to Read

All metal C930e webcam
All metal C930e webcam
The Soldering Tools That Make Your Life Easier
The Soldering Tools That Make Your Life Easier
App note: Operation evaluation of ultra low ON resistance MOSFET supporting quick charge for 1 c ...
App note: Operation evaluation of ultra low ON resistance MOSFET supporting quick charge for 1 cell Lithium ion battery protection
Synthesized Sidetone
Synthesized Sidetone
App note: Application precautions: Power MOSFET application notes
App note: Application precautions: Power MOSFET application notes
A high current power supply built around a server voltage regulator
A high current power supply built around a server voltage regulator
Bridge Monitoring System using Wireless Sensor Network
Bridge Monitoring System using Wireless Sensor Network
Piezoelectric Micropump Driver
Piezoelectric Micropump Driver
Fixed DC/DC Regulator Output Margining Using Digitally Controlled Potentiometer
Fixed DC/DC Regulator Output Margining Using Digitally Controlled Potentiometer
An Arduino-powered automatic guitar footswitch
An Arduino-powered automatic guitar footswitch

Top




Shares