On Mar 16, 2005, at 11:21 PM, David Thompson wrote:
> I also like to recall the 75 meter antenna Jim Brookman used in the
> early
> 70's. This was a rotatable vertical array with full size half wave
> wires
> off a high tower attached to the boom of a big beam. The guys in the
> Northeast was surprised to be beaten to DX by a lowly W4. Jim says
> it was
> a great antenna. You just had to make sure the elements did not snag
> while
> rotating.
This antenna was discussed in a particularly memorable article in "73"
magazine back in the 70s. It did talk about someone who put up a
full-sized quad and is now hiding out in KP4 with a large quantity of
wire.... Very funny article.
As I recall, there was a photograph of the ends of one of the parasitic
wires. These were held taunt with a couple of cinder blocks tied on the
ends. Turning the array meant the ends would swing considerably, doing
interesting things to the pattern and SWR....
This was such a simple antenna design, I'm surprised no one has tried
to duplicate it after all these years.
Bill Coleman, AA4LR, PP-ASEL Mail: aa4lr@arrl.net
Quote: "Not within a thousand years will man ever fly!"
-- Wilbur Wright, 1901
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