[Thursday] Spark gap transmitter

[Ken Carr]

Randy,
That does look like fun. I'm sure I have a spare coil around.Of course they can develop a lot of current if fed with the right voltage.
Here is a simple demonstration that explains the utility of a coherer and howit is able to detect a spark gap transmission.The demonstration shows how to make a coherer out of some bolts, iron filings, and plastic tubing.It also shows how to make a very safe spark transmitter from a barbecue igniter.Very well done and accessible to even young museum visitors. The entire article is availableas a downloadable PDF.
(PDF) The coherer: With simple demonstrations of the generation, propagation and detection of radio waves

| 
| 
| 
|  |  |

 |

 |
| 
|  | 
(PDF) The coherer: With simple demonstrations of the generation, propaga...

PDF | A coherer is a bistable device based on metal filings loosely confined between solid metal electrodes. Thi...
 |

 |

 |









Ken Carr ...  KE1RI, A New England HamWesterly-Pawcatuck AACAN.E. Steam & Wireless Museum

 

    On Friday, March 27, 2020, 06:59:49 PM EDT, Randall Snow via Thursday <thursday at newsm.org> wrote:  
 
 Hi guys,
I just saw something pretty fun for today. This guy has been doing videos on electricity for years and is well known for both his unibrow and electrocuting himself. The focus of his latest video is spark gap transmission and he has a pretty neat detector in there too. Enjoy!
https://youtu.be/SnKKj2bonAI

_______________________________________________
Thursday mailing list
Thursday at host194.hostmonster.com
http://host194.hostmonster.com/mailman/listinfo/thursday_newsm.org
  
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://host194.hostmonster.com/pipermail/thursday_newsm.org/attachments/20200409/e1f96166/attachment.html>