On Wed, 11 Sep 2002, Mike Singer wrote:

> Yes, may be you are right. The only thing I'm struggling
>to understand: for what heck these RF guys use sine
>RF signal and all this chebyshev filters to feed emitting
>devices.
> Why not just switch chaotically large open coil by FET to
>work at 303.825 Mhz for example, just adjusting slightly
>"self resonant  frequency of the search coil".

Because they are not allowed to use spark gap transmitters anymore ;-).
However metal seekers, mine seekers and geophysics equipment as well as
our friends in khaki with their radars ARE autorized to do just that when
needed. The coil is not chaotically large, It just has a size, and a
number of turns, you know ? The chaos is still elsewhere ...

Peter

>73 ( Best regards)

no need to translate that

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