Building a Crystal Radio

Crystal radio is the extract soul of a radio. This radio has some parts; it requires no electricity or no batteries and no other sources of power. One can manufacture it in a very less time. A crystal radio has no batteries due to the best ability of the one’s ear. The ear is very sensitive to weak noise. It uses the power of the radio rays that are sent by radio transmitters.

The following parts are required to build a crystal radio:

Strong plastic bottle

Powerful plastic bottle are used in making of crystal radio that contain hydrogen peroxide. These bottles come in 3″ of diameter and about 5 –7 inches lengthy.

Enamel coated magnet wire

Enamel coated magnet wire about 50 feet is used to build radio. One can purchase it at Radio Shack. One can also use vinyl-coated wire like Radio Shack number 278 – 1217.

Germanium diode

Most of the stores have these that sell electrical parts. They are also known as IN34A diodes. They are very beneficial as compared to general silicon diodes.

Telephone handset

One listens to a crystal radio just like one listens to the phone. If one can find it at a garage sale, one is set or has an old telephone sitting or one can purchase the handset cord.

Set of alligator jumpers

One can get it from stores where electrical parts are sold or Radio Shack part number 278-1156.

Antenna wire

One can use wire about 50 feet to 100 feet for an antenna. It is perfect in length as one can use it for FM radio antenna or TV antenna by joining the radio to wires.

One should use a sharp item such as an icepick or a nail to make 4 holes in the surface of the bottle. One pokes 2 holes of an inch close to the top of the bottle and can be equivalent at the underneath of the bottle with other two holes. These holes are useful to hold the wire.

Insert the wire in the holes at the apex of the bottle and pull about eight inches wire from the holes. If the holes are in large size and radio wire is movable, then it is right to loop the cable in holes again.

And now, take the end of the cable and begin twisting it around the bottle. When one has wound about five windings on the surface of the bottle, discontinue and create a small loop of cable that is shown up from the bottle. After this, wrap the cable around a pencil or a nail.

Carry on another five rounds of winding and another makes a small loop. One should perform this in anticipation of the bottle which is fully wrapped from cable and one can reach the holes of second set at the base of the bottle.

Now, cut the cable in the order that leaves minimum 8″ remainders and thread this balancing cable to form two holes. The bottle will look like the following:

After this, one removes the insulation from the end point of the cable. If one is using enameled cable, one can use sandpaper for removing the insulation. Never eliminate the insulation from the volume of the coil from the little loops and wire ends. If one is using a wire that is vinyl coated, the insulation occurs easily with a knife.

And then one joins the Germanium diode to the cable at the base of the bottle. Now cut one end point of the handset cable for removing the modular phone connectors. There are about 4 cables inside. One can also use the colorful cords such as black and yellow wires. After this, take a battery such as AA, C or D cell and touch the cables to the battery terminals until one hears a noise in the earphone.

The cables in the handset wire are generally delicate copper foil which is covered around the plastic threads. Join one handset cable to the free end of the Germanium diode. Join another cable to the wire from the apex of the bottle. And then, cut an alligator high jumper to the aerial.

Now one can hear radio station in the phone handset. Cut the alligator jumper to taps on the coil for selecting different radio stations. The radio works well and one can create it looking well and by building up in a wooden box.