Vintage - 6-158 - Audio, Microphone Element. Crystal, Piezoelectric, Harmonica, Guitar, Ham Radio, Harp

Piezoelectric Microphones, also called Crystal Microphones, were used primarily between 1930 and 1960. At the time, these were important to the home recording and small-scale paging market, but were later replaced by lower-cost dynamic and electret capacitor microphones. Capacitive Nature: A crystal microphone functions like a capacitor, generating a voltage when subjected to sound pressure (piezoelectric effect). While capacitors allow current to flow when charging and discharging in an AC circuit, the inherent insulating property of the crystal itself presents a very high impedance to a direct current measurement from an Ohmmeter. Crystal microphones rely on the piezoelectric effect: This means they generate a voltage when mechanically stressed, like when sound waves cause their diaphragm (attached to the crystal) to vibrate.

Type: Audio, Piezoelectric Crystal Microphone Element.

Crystal, Piezo High Z. (Will Measure Open using an Ohm meter, approximately 260 pF)

Blue Plastic Body.

Overall Dimensions: 22.7mm Diameter, Round x 11.1mm High. (0.875” x 0.437”)

New Old Stock

Vintage – Crystal Microphone Elements are Difficult to Find.

Manufactured in Taiwan

Applications: Great for radio and electronic project experimenter use, vacuum tube circuits, anywhere a high impedance microphone is required. Home recording systems, Amateur communication, Mobile communication. Also Great for radio and electronic project experimenter use, vacuum tube circuits, anywhere a high impedance microphone is required. Piezoelectric Crystal Microphones are durable and have a relatively large electrical output; for this reason, they are often used in telephones and portable sound systems. Also a deep "Fat Sound" saught by Harmonica players. They do not have very good linearity and not well suited for high quality fidelity sound recording.

Discounts are provided for purchases of 2, 3,  4 or More.