3 Pack High Impedance Piezoelectric Crystal Earphones 20,000 Ohms | High Impedance, 20K Ohm, Bare Wire, Transistor Radio Project, In Ear Design, Bare-Lead Connection

Build crystal radio and transistor radio projects with three piezoelectric crystal earphones. Each wired earpiece provides 20, 000-ohm impedance for circuits designed for high impedance. Match the 20, 000-ohm rating to your receiver before making connections. The brass diaphragm and all-soldered wire joints offer reliable construction for compatible radio circuits. The black wire measures 42 inches and ends in pre-tinned bare wire leads. Confirm the connection method and lead placement for your crystal radio or other electronics project. Use the beige molded in-ear earpiece without adding a battery. Its wired form suits compatible receivers that accept a high impedance earphone through bare lead connections.

Stock three matching earphones for several builds, repairs, or bench tests, and each pack delivers consistent parts for compatible radio work. This product is not a toy and is intended for use by teens and adults ages 13 and up