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Ceramic earphone/Crystal earpiece for Crystal Radios and other projects requiring a very sensitive high impedance earpiece. 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. Specifications: ▪ Impedance: 20,000 ohm ▪ Resistance: 20,000,000 ohm ▪ Capacitance: 15,000 pf ▪ Sensitivity: 57db @ 1KHz ▪ Frequency Range: 200 - 8,000Hz ▪ Operation Temperature: -20 to 60 degree Celsius ▪ Wire: 42-inch Molded twisted Wire ▪ Connector: Tinned Leads for DIY Connections ***Note: These are the factory specifications and may vary Review: Time Capsule - Identical to old style units supplied with things like crystal radios.
| ASIN | B01F5XMDGK |
| Age Range (Description) | Adult |
| Audio Driver Type | Piezoelectric Driver |
| Best Sellers Rank | #394,579 in Electronics ( See Top 100 in Electronics ) #15,340 in Earbud & In-Ear Headphones |
| Compatible Devices | Crystal Radios |
| Connectivity Technology | Wired |
| Control Method | Remote |
| Date First Available | May 4, 2016 |
| Earpiece Shape | rounded_tips |
| Headphones Jack | 3.5 mm Jack |
| Included Components | Cable |
| Is Discontinued By Manufacturer | No |
| Manufacturer | ProTechTrader |
| Material | crystal |
| Model Name | Crystal |
| Noise Control | None |
| Number of Items | 1 |
| Sensitivity | 57 dB |
| Special Feature | Lightweight |
| Specific Uses For Product | DIY/Electronics Projects |
J**Y
Time Capsule
Identical to old style units supplied with things like crystal radios.
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