On Jun 28, 10:04 am, (Dave Platt) wrote:
In article ,

Hal Rosser wrote:
Not yet, but how would you "fine tune" one as a director?
Wire antennas are easy to tweak by clipping a bit off the ends.
Lots of folk pick a material easy to work with, but CDs may not fit that
category.

Perhaps one could use a compass, and simply scribe a circle of
appropriate radius through the aluminized layer? Experimentation
would be required, as the area outside the scribed circle would
probably act as a capacitive load for the director disc inside.

--
Dave Platt AE6EO
Friends of Jade Warrior home page: http://www.radagast.org/jade-warrior
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Thanks all for your answers and questions.
I'm less than competent in understanding
antenna design, though I've installed 100's
of them and studied a fair amount physics.

Recall that a loop antenna is good for UHF,
the closest thing in antenna theory would be
a folded dipole receiver. (I'm thinking of Hal's
question here), what sort of director-reflector
would improve a loop antenna?

Dave's "scribe" suggestion sounds interesting.
I wonder if discs may have advantages over
over conventional wire elements, perhaps due
to capacitive effects?
Regards
Ken