I have made a rotatable 44 feet EDZ at about 50 feet high. I use a ldg
automatic tuner and it tunes on 6,10,12,15,17,20,30,40 and 80 meters. I am
very pleased with the results.

The el. are made from fishings rods and look a bit like a horizontal V form.

As the EDZ has gain on 10 meter would a reflector at 8 feet create more gain
and also FB?

And what would be the effect on the other freq. will I also get some gain
and FB.?

73 pa3glf

I have made a rotatable 44 feet EDZ at about 50 feet high. I use a ldg
automatic tuner and it tunes on 6,10,12,15,17,20,30,40 and 80 meters. I am
very pleased with the results.

The el. are made from fishings rods and look a bit like a horizontal V form.

As the EDZ has gain on 10 meter would a reflector at 8 feet create more gain
and also FB?

And what would be the effect on the other freq. will I also get some gain
and FB.?

For 10m, you would use TWO reflectors, each slightly more than a half
wavelength, aligned with the currents in the EDZ. It will look like two
2 element yagis side by side. You probably want the spacing closer than
8 feet. You can also place directors in front of the EDZ.

That will only give you gain and FB on 10. You would need other reflectors
for the other bands, for example a single reflector for 20m would work well.

Torsten
N4OGW

Dick wrote:
As the EDZ has gain on 10 meter would a reflector at 8 feet create more gain
and also FB?

The EDZ will have a bidirectional gain of about 10 dBi over ground.

One reflector will give you a gain of about 11 dbi over ground with a FB
ratio of about 3 dB, not really worth fooling with.

However, two reflectors arranged end-to-end will give you a gain of about
13 dBi over ground with a FB ratio of about 10 dB, not too shabby. Align
the center of the two reflectors with the standing wave current loops in
the driven element. (current loop = current maximum point = current antinode)

And what would be the effect on the other freq. will I also get some gain
and FB.?

Not unless you short the two reflectors together to obtain gain on 20m.
Gain on the lower bands can be obtained with a loading coil between the
two reflectors. Get fancy and install a motorized loading coil between
the two elements (like a screwdriver).

Or use two driven elements and phase them to get a beam on all bands.
(easier said than done)
--
73, Cecil http://www.qsl.net/w5dxp



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