Description
Multiple-functional Crystal Radio FM Radio Magnetic Ring Dual Circuit Coil and Direct Coupling Conversion
Description:
- The front of the crystal radio is not only a crystal radio, but also can be connected with three major parts, namely, coil, variable capacitor, detector diode and field tube, and crystal radio. A complete crystal radio can be assembled, which can visually compare the advantages and disadvantages of the coil and detector, which is very convenient for players to play with crystal radio. The ore machine uses magnetic ring, coil double circuit and direct coupling conversion, diode and field tube conversion, and the second gear of the ammeter can be changed and closed, Equipped with impedance converter, it can be used as both high impedance and low impedance earphones, with complete functions and convenient operation.
- The reverse side is an FM radio with MP3 music player, which is not connected to the front side. The 3.7V 18650 rechargeable lithium battery is used for power supply, 30 x 70 speakers and support remote control, and the level meter in the middle is actually a pass meter, which is used to test the continuity of the crystal radio. It is very practical. The whole machine is 200 x 120 x 80 (mm).
Package Included:
- 1 x Crystal Radio
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