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Old March 13th 07, 07:40 PM posted to rec.radio.amateur.homebrew,sci.electronics.design
Michael A. Terrell Michael A. Terrell is offline
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First recorded activity by RadioBanter: Jul 2006
Posts: 398
Default Detecting Ultrasound

clifto wrote:

Michael A. Terrell wrote:
clifto wrote:
John Smith I wrote:
Scott wrote:
clifto wrote:
Stace MacGuyver wrote:
Suspend a thin shaving razor blade between two pieces of dental floss
and put
your ear close to the blade. Watch the razor vibrate.

That's pretty cool, MacGuyver. Does the razor blade do anything?

It cuts off your ear if you get too close

Be better if you could use it as an electric razor ...

Replace the dental floss with Litz wire and attach ends to 110 VAC.

Wait. Maybe not. Considering how many stations you can pick up with a
razor-blade radio, that would probably interfere with vital communications
all throughout the spectrum. What's the resonant frequency of a whisker?



They don't make the blue blades anymore.


Do they make any other kind of thin shaving razor blades?



Yes, but the blueing was what made a detector.


--
Service to my country? Been there, Done that, and I've got my DD214 to
prove it.
Member of DAV #85.

Michael A. Terrell
Central Florida