Crystal Radio Set Project Ultra - project ultra is part of the little whippersnappers crystal radio project which is part of the tread stone pebble program it is a top secret government project to get all the whippersnappers in the land to receive and decode spy radio signals in the medium wave mw and long wave lw bands a crystal radio or crystal set as it is sometimes called is a radio that only uses the power of the radio waves picked up by the antenna to generate the sound heard in the head phones the reason it is called a crystal set is because they use a mineral crystal as a diode for the detector in the circuit the simplest radio receiver known as a crystal set consists of nothing more than a coil tuning capacitor diode detector and a pair of earphones there s a lot that goes into making a nice crystal radio set so this is going to have to be broken down into two parts the first part is the actual making of a functional.

radio and the second part is making the whole arrangement look nice not long ago i rebuilt and put into operation a heathkit cr1 crystal radio i hadn t built a crystal radio since i put together my first radio when i was 10 years old nor had i used a crystal set since i was 13 science buddies staff scientists worked long and hard to develop a crystal radio kit that will make your project successful and avoid the many problems of the toy store crystal radios span class news dt 07 04 2016 span nbsp 0183 32 the crystal radio is a timeless learning experience often our first insight into how a radio works for some of us that childhood fascination never dies because this set is experimental i make no claims that this design or any particular hookup that results from this article is the ne plus ultra in short wave crystal radios we all know that the perfect crystal set does not exist.

the perfect crystal set for my location is something that may or may not work for you i have to deal with a 50kw blowtorch that is located virtually in my a crystal radio uses only tuned circuits to select the stations and a crystal detector to rectify the radio station s signal to enable it to be heard with a set of headphones it is entirely passive it has no active ponents like tubes or transistors and uses no electricity the project crystal radio 25 feb 00 the project crystal radio involves the construction testing and operation of a series of crystal radios starting with a very basic set and ending up with a medium performance dx set plete with antenna tuner



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