Piezoelectric Earphone High Impedance Ceramic Earpiece Bare Wire Leads Transistor Crystal Radios & DIY Make Electronics Projects 20,000 (20k) Ohm Sensitivity Vintage Classic Style Piezo Electric

Have used in several different circuits. No problem. Recommend

Good item for the price..

My son recently discovered crystal/trench radios and wanted to try his hand at making one. He asked for a piezo earpiece and this is the one I decided to grab for him. Its just like the one I used when I was his age to make a radio. Worked flawlessly. Grab one and get building a radio!

I wonder whether anybody has actually gotten one of these to fit inside their ear canal? Maybe I'm doing it wrong, but should be intuitive, right? Put the part that goes into the ear canal into the ear canal, right? I suspect I might have ordered the "elephant" version instead.Admittedly, when I hold it against my ear canal, I can hear my crystal with it, so it must be working.

I build a lot of different types of radios and related stuff. Use these earphones on very basic crystal/fox hole type sets. OK price, decent sound and no issues with any of them.This radio is printed on a FLASH FORGE 3D printer (reviewed on AMAZON), uses coil wire and a germanium diode also from AMAZON. A good ground, a long enough antenna (both with the same coil wire as the coil) and you can listen to local AM broadcasts. No matter how many I make, it is always fun when the static softens and a voice or music is clear. And it is powered purely by the radio waves themselves.

I plan on building an old crystal radio, and have gotten all of the components, now gathered. The wire will be to wind a coil, and since the crystal radios are so simple,there is not much to say about the wire other than it is wire,m in the correct diameter, and came quickly and was as expected.

This was an extremely poor product I could not tune to a single radio channel in multiple locals

Great for my vintage crystal radio build.