Behold, K1jhj signalled from keyed 4-1000A filament:

Check
http://www.qsl.net/k1jhj/
for CoilCalc and CoreCalc, for air-core coils and toroid coils on T-type
cores.

Right on! Thanks!


Much better and more useful than the cardboard slide rules.

LOL! Want a few of mine?

--
Gregg
*It's probably useful, even if it can't be SPICE'd*
http://geek.scorpiorising.ca