On Thu, 10 Jul 2008 08:41:15 -0700, Richard Clark wrote:

On Thu, 10 Jul 2008 09:05:56 -0400, "W3CQH"
wrote:

Double winding - in which direction and spaced how far apart in each
direction?

On Wed, 9 Jul 2008 19:11:52 -0700 (PDT), Art Unwin
wrote:

Wind a close coil any diameter with it until half the wire is used then
change direction and come back
without changing wire winding direction and wind the wire on top of the
first coil where you finish with two wires to feed. Put a variometer in
series with it and then get on the air. Now this is not exactly in
equilibrium because one coil is a larger diameter than
the other. Nor is the wire pre twisted pair which nullifies near field
noise to my thinking. Now you have a helix style antenna but without
the helix.
Coat the antenna with an alkyd type solution before you slide it off
the tube since the inside coil must be exposed the same way the outside
coil is exposed


Take one wavelength of zip cord. Wrap it around any diameter form, as
distinctly specified above by the authur. Half the wire is used going,
and half the wire is used returning by specification of the zip cord, as
distinctly specified above by the authur.

There is no change in winding direction as zip cord guarantees this by
physical attachment, as specified above by the authur. Both wires are
wrapped without changing direction, as distinctly specified above by the
author.

Not that I have any confidence in Art's antenna design. But you wind a
cylinder with zip cord from left to right, with the left end pair being
the feed and the right pair shorted (as if a single 2W wire) then the
'return winding' will essentially be wrapped in the opposite direction.