Quote:
Originally Posted by gibon
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and what is the Price for this Beauty ??????
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Here one very cheap, easy to build and effective:
Frequency range from 666Hz to 3066Hz. It works in LED Geiger counter style.
For L1 best to use litz wire, but is not necessary, CuL in dia of o.2 to o.25mm would be fine too. Given L1 inductance 57mH is as minimum.
And of course, you can experiment with other C1, higher or lower, value too.
You can build ESP (Earth Signal Pistol) out of this schematic.
Happy LRL hunting!
