[TowerTalk] Acuity

[Pete Smith]

At 09:01 AM 3/18/1999 EST, Fred Hopengarten wrote:
>
>From:
>Fred Hopengarten  K1VR               781/259-0088
>Six Willarch Road
>Lincoln, MA 01773-5105
>permanent e-mail address:  fhopengarten@mba1972.hbs.edu
>if sending attachments:  k1vr@gis.net
>
>Gentlemen:
>
>	I had a client who took a whole new approach to the visibility of
>towers issue.  Unfortunately, he recently died -- of reasons unrelated to
>the stress of applying for a tower (which I secured).  We never had to
>fight the fight for which we were preparing, so I never got my hands on
>the original material.  However, here's what he wrote:
>
>Date: Wed, 17 Jun 1998 23:00:15 +0000
>Subject: Guy Wires
>
>Dear Fred, 3/16 diameter guy wires become invisible at 54
>feet (53.6 ft).   "Principles of Television
>Engineering", D.G. Fink, McGraw-Hill, 1940, p. 32. 
>

Unfortunately, I believe this is incorrect -- my 57-year old eyes can
readily see all the guys on my tower (3/16 EHS) in most lighting conditions
at distances of >200 ft., silhouetted against the sky.  There are no
insulators to provide visual cues, either.  For that matter, I can see the
#14 radiators of my 80-meter array at the same distance.


73,  Pete N4ZR
Loud is good


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