HOT 20MΩ Crystal Radio Earphone Earbud with Cable and Connector

Description

High Impedance 20MΩ Crystal Radio Earphone with cable and connector
High impedance
earphone
fitted with connector and cable. Designed for use with crystal radios.
Terminated with a 3.5mm jack plug
Impedance 20MΩ
Perfect to make electronics projects such as Crystal or Transistor Radios often used in schools and STEM
(
Science,
T
echnology,
E
ngineering, and
M
athematics)
electronic experiments requiring a high impedance ear piece.
High 20,000 ohm impedance with resistance over 20 million ohms and a capacitance of 15,000 pf
Rated Sensitivity of 57db at 1KHz in the frequency range from 200 to 8,000Hz .
Highly sensitive molded earpiece with twisted wire with 3.5mm (1/8in) headphone audio male wire connector.
Classic Piezo Electric Crystal Earphone for DIY Electronic Projects and Kits.
Ceramic earphone/Crystal earpiece for Transistor and Crystal Radios, Sensitive Electronics Projects, Lab research and other DIY experiments requiring a very sensitive high impedance earpiece.
Piezoelectric earphones also known as crystal earphones, ceramic earphone, and piezo earpieces are the most sensitive earphones. They are in fact many times more sensitive than even the most sensitive magnetic earphones, dynamic earphones, or electrostatic earphones that you may use on your iPod or iPhone. Sensitive earphones have a very high impedance, which is measured in ohms and should not be used directly with a modern amplified radio.
Crystal radios will not work with modern earphones or 'earbuds' as they are designed to operate with amplified audio sources found in today's electronic devices.   Crystal Earphones are used in the construction of the crystal radio and in some science experiments such as listening to electric fish.