Mineral Radio Assembly Kit Passive Crystal Radio Assembly Kit With Meter He HYDN For Sale

Feature:

1. Passive Radio: The radio operates entirely using radio wave energy, without the need for batteries or external power sources, and is maintenance free.
2. Easy to Make: Only requires antennae, ground wire, tuning circuit, and detector (ore or diode), the circuit is simple and easy to assemble.
3. Educational Enlightenment: This kit visually demonstrates the principles of electromagnetic wave reception and detection, making it a teaching tool for beginners and teenagers to enter the field of radio.
4. Sound Quality Potential: No interference from active amplification circuits. If connected to an external amplifier, it can restore pure AM broadcast audio signals.
5. Testing Tool: The mineral radio can be used as a passive load to detect antennae system efficiency and ground wire quality. ‌

Specification:

Item Type: Mineral Radio Assembly Kit
Material: ABS
Application: Beginner Teaching and Science Popularization, Passive Emergency Monitoring, Antennae Efficiency Testing

Package List:

1 x Plastic Case
1 x Panel
4 x Screw
4 x Nut
1 x 100x10 Magnet Bar
1 x Meter Head
1 x 10uF Electrolytic Capacitor
1 x 2200PF Capacitor
1 x Diode
2 x Terminal Post
2 x Zip Tie
1 x Coil
1 x 223P Variable Capacitor
1 x 3.5mm Headphone Jack
1 x 5 Position 2 PoleBand Switch

2 x Knob
2 x Accessory

Note:

This is an ore radio, it does not require power, but must have outdoor antennae and ground wire, without high impedance headphone.