I bought a small prop pitch in 1975 from a ham in California WB6 something
his name was Bob Leo. (Not W7LR). He sold them via the old yellow sheet
classifieds.
I got a mounting plate from Lou Tristao and put inside my 71 foot crank up.
I had 3 antennas back then, a 5 El KLM 20 meter Big Stick, a 4 el 10 meter
beam on a 17 foot boom, and a Mosley 2 el
40. The prop pitch worked great but I had to keep working on the selsuns to
get the direction right.
Never a problem with the prop pitch motor. But a couple of years later I
had a problem with tree branches and one of the elements caught and the prop
pitch kept going and one of the cross bars was sheered off. It took two
attempts with a welder to get it back correctly.
I moved to my current location in 1979 and noticed that I had a problem in
the same location. I called a fellow called Pat the welder and he went up
on the roof and welded the spot and one other place standing on the roof. A
welder on the roof drew a crowd. See what that crazy ham was having done
now.
A fellow in Asheville NC was selling complete units about 1990 or so. He
said, yes, a prop pitch will probably rotate your house. He noted a NC ham
rotated his coax to the breaking point. So be careful with a prop pitch.
Back in the mid 1990's I seem to recall K6NA in San Diego was selling
converted units.
73 Dave K4JRB
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