Topband: Rotatable Flag

[k6se@juno.com]

Mike Knowlton wrote:

"Is it a good idea to isolate the mast and crosspipe from ground on a
rotatable flag?"

I designed the Flag in the computer using non-metallic supports, but I
just modeled it using a metallic mast and metallic boom, with both
grounded (but insulated from the antenna wire, of course).  There was no
significant difference in the pattern.

The modeling was with a 20-foot mast and 29-foot boom, with the bottom
wire of the Flag 6 feet above ground.  A higher Flag would have a taller
mast than 20 feet, which might have more effect on the pattern.

73, de Earl, K6SE


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