[ARC5] [Boatanchors] Coils and the winding thereof

[Ian Wilson]

Two potential problems with lossy coils/formers:
  - heating
  - poor harmonic suppression

I've had a Millen (Miller?) adjustable coil get hot enough to discolor badly
when used in a driver stage. This was probably a result of the small physical
size of the component; something larger on an air core would probably not
have got particularly hot.

Harmonic suppression in output tanks depends to some extent on the (unloaded)
Q of the inductor. If you are following your po'boy TX with a new-fangled modern
antenna tuner, this is unlikely to matter. But it might be significant
if you are
running a long wire with no additional filtering.

Fun project .. now where's my soldering iron?

73, ian K3IMW