[TenTec] Zero Beat

[Lee Crocker <w9oy@yahoo.com>]

If you can't hear it then see it.

http://www.k6xx.com/radio/vizicw.pdf

This is a simple and cheap circuit to build.  By
adjusting RT1 and RT2 using switched values you can
make the circuit center on a number of center
frequencies.  Connect it to  the line level audio
output.  I built one that is discretely centered on 4
switchable freqs: 280, 350, 500 and 700 hz.  Most of
my listening is at 350.

73  W9OY


                
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