File:RBDiode.pdf
Original file (1,500 × 1,125 pixels, file size: 702 KB, MIME type: application/pdf, 4 pages)
 | This is a file from the Wikimedia Commons. Information from its description page there is shown below. Commons is a freely licensed media file repository. You can help. |
Summary
| Description |
English: AM crystal radio receiver using a Gillette stainless razor blade with copper tickler as a demodulator (detector). The detector works and stations are heard when the wire is touched to the black etched letters and arrowhead symbols on the blade, but not when it is touched to the plain stainless surface.
Induction coil 146 turns #22 copper enameled wire on spent 1.6 inch dia plastic wrap paper tube will span AM broadcast 760 kHz to 1500 kHz AM station tuning range. Spring loaded sliding contact with bare copper winding zone enables station selection, Springy sliding contact made from coffee can 5 mil aluminum hermetic seal. (common household discarded items) 50 foot outdoor antenna input and water pipe ground are required. Demodulated AM audio output will drive a single sensitive electro-magnetic earphone or a single 2 Watt audio amplified computer speaker. Components required are: hand wound inductance coit, old Gillette stainless razor blade, dry pine breadboard, single electromagnetic earphone, or a 1 to 2 Watt amplified computer speaker. No resistors nor capacitors are needed. This razor blade diode AM receiver illustrates the ultimate in AM demodulation simplicity. Yellow Rose9 . |
| Date | |
| Source | Own work |
| Author | Yellow Rose9 |
Licensing
- You are free:
- to share – to copy, distribute and transmit the work
- to remix – to adapt the work
- Under the following conditions:
- attribution – You must give appropriate credit, provide a link to the license, and indicate if changes were made. You may do so in any reasonable manner, but not in any way that suggests the licensor endorses you or your use.
- share alike – If you remix, transform, or build upon the material, you must distribute your contributions under the same or compatible license as the original.
File history
Click on a date/time to view the file as it appeared at that time.
| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 20:18, 21 September 2011 |  | 1,500 × 1,125, 4 pages (702 KB) | Yellow Rose9 |
File usage
The following page uses this file:
Global file usage
The following other wikis use this file:
- Usage on fr.wikipedia.org
- Usage on ja.wikipedia.org
- Usage on pt.wikipedia.org