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Old March 16th 20, 05:38 AM posted to,
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Default [IW5EDI] 7 element Yagi for 20 Meters band

IW5EDI Simone - Ham-Radio

7 element Yagi for 20 Meters band

Posted: 15 Mar 2020 03:24 PM PDT

They say if it didnt blow down it was not big enough, this one was big
enough and it did blow, not off but up and over the top of the tower like
an umbrella one very windy day in January 1974. I was at work and the XYL
called and said the thing blew off the top of the tower- WOW, I imagined it
in somebody’s living room. In fact it did not blow off it blew over the
top, broke in two and slid down about ten feet an hung on the safety
cable. When I originally built the thing I rigged this safety line of 3/8
inch aircraft cable from the tower to the four inch diameter boom just in
case. I remember I used to laugh when I told people about the safety cable
never thinking it would actually blow off the tower. The storm was really a
bad one, very high winds with ice covering the boom and elements. In fact
a drive in movie screen blew over just down the street from me. It was a
very sad occasion, I was the one sad and the neighbors were glad. The
obliging neighbors called the building inspector and he was waiting for me
when I got down from the top after attaching a rope, disconnecting safety
cable and cutting the coax cable and letting it down, smoothly. The
inspector notified me that one of my neighbors said that it had blown down
three times already this year. This beam worked very well for me for
several years.

I apologies for the quality of the photo. Its the only one I have. What
you see is what you get. Very narrow beam pattern, thats not QSB man
thats my beam swinging in the wind.

The omega match was motorized because it was so far out on the boom.

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