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Feedback Device Outline  Rating:  Rating
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 Posted: Dec 15th, 2010 06:05 PM
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EVPDave
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This design came to me a month ago and I finally put the hardware together to try it. It is a simple feedback loop using both radio (RF) and light. I knew there would be a feedback sound but I was surprised to hear the distinctive RF feedback sound v.s. acoustical feedback. RF feedback has a hollow tone to it.

The device is touchy to set up and is operated in a dark room. The photomultiplier tube I used is very sensitive to modulations of light.

Out of a minute of distorted voices I could only understand one message and it's not that great. I will post a block diagram of the device after this post.

"The Bausch and Lomb inceptor" 

Attachment: 121510thebauchandlombinceptor.mp3 (Downloaded 757 times)

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 Posted: Dec 15th, 2010 06:06 PM
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EVPDave
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Diagram of the device.

Attached Image (viewed 369 times):

evpdave1.jpg

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 Posted: Apr 23rd, 2011 01:17 PM
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mikesndbs
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Voice is good!

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