MGFoster wrote:
Cecil Moore wrote:
| coil coil |
+---////////--------FP--------////////---+
| |

Isn't that a linearly loaded dipole?

No, it is a loaded dipole. It uses inductive loading
and top hat capacitive loading. "Linear", in this
context, means "evenly distributed" loading.

Would you keep the wooden dowel form (for the coils), or would you let
them be air-coils (how to keep them from separating [tape])? What
lengths would you use for the wire/coils? What type feed line would you
use: twin lead or coax?

I would use PVC pipe and run a Dacron "messenger line"
through the center for mechanical support.

For the coils, you will need approximately double the
length of the straight wire. Design the coils so you
can add or subtract turns. Or design the top hats to
be adjustable. Or adjust the length of the straight
wires.

The feedpoint impedance will probably be lower than
50 ohms. For single-band operation, coax will probably
work well with an antenna tuner.
--
73, Cecil http://www.w5dxp.com