Re: Harmonics

Tesla List wrote:

> Original Poster: Russell Babylon <babylon-at-ccpl.carr.lib.md.us>
> Being new at tesla coils I have a basic question.  Should the
> frequencies at which your primary and secondary coils operate be
> harmonics?  I assume that this is what is happening when people speak of
> adjusting the primary coil with some sort of adjustable tap.  The power
> transfer should be greatest when the secondary is operating at a
> harmonic of the primary coil frequency.


Usually the primary of a tesla coil is set to resonate at the SAME frequency
that the secondary rings at.  this is akin to pushing a swing every time it
rocks back.  However, there are some cases where the secondary is set to
ring at a harmonic of pri freq  as you mentioned.  I am making such a device
which actually has two secondaries inside a race-track style primary that
resonate at different harmonics of the pri freq...  this interference wave
between the output of the two secondaries will cause the coils to arc
between eachother.