VE7VV

Low Pass Filters

"Constant K" (for flat 50 Ohm input Z curve in desired band), Pi form, designed with AADE, inductor voltage at 200W from Spice model used to calculate B field in toroid to insure within limits

2200m 200W Low Pass Filter, inductors 70 turns on T200-2

2200m 200W Low Pass Filter - Measured Performance

630m 200W Low Pass Filter, inductors 39 turns on T130-2

630m 200W Low Pass Filter - Measured Performance

160m 200W Low Pass Filter, inductors T130-2, toroids.info says 21T, measured 4.9 uH at 20T spaced aprox. 80%.

160m 200W Low Pass Filter - Measured Performance