> "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 _______________________________________________ UR RST IS ... ... ..9 QSB QSB - hw? BK
