> "A couple rules for toroidal inductors might be useful. To increase the
> reactance you increase the number of turns -- the inductance goes up
> approximately the square of the number of turns. To increase the power
> handling capability you add additional cores to make a stack of cores.
> This will also help with the inductance since the toroid core AL value is
> affected by the cross sectional area of the core."
Another important rule when winding CM chokes: On common-mode currents (the
bad current), an inductance equal to 2*L is added in series with each of the
two conductors. On differential mode currents (the good current), L cancels
and has no effect. Ever wonder why we can keep adding so much L in CM choke
windings and it does not appreciably degrade differential-mode current and
frequency response?
Paul, W9AC
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UR RST IS ... ... ..9 QSB QSB - hw? BK
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