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Doing the inner coil – L2
Check the low pass table in the appendix and see how many turns to use for L2.
Wind the L2 inductor, if you are unfamiliar how to wind toroidal inductors - see the winding guide in the
appendix.
After you have wound inductor L2 it’s wires are probably a bit long, like in the picture.
Cut the wires down to length leaving about 12mm/half an inch.
Now we need to get the enamel off the ends so they can be soldered.
To do that first burn the ends with a flame.
