OK, This Is A New One

[Dan.Strassberg]

WKY's (or whatever the current calls are) ND (day) tower (which is also used
as part of a three-tower night array) is a segmented (Franklin-like) design,
but it isn't a true Franklin, which would consist of two 180-degree
sections. I think WKY's sections are 161 degrees each, but I can't really
make sense of the sectionalization shown in CDBS. (Actually, I'm using Bob
Carpenter's AMSTNS program, which uses CDBS data.)  There is another short
section (15 or 16 degrees), which may not increase the overall height and
which may act as a "top" load for the lower long section. For a real
understanding of the "WKY" tower, I think we'd need an annotated drawing or
photo. As for efficiency (1065 mV/m @ 1 km with 5 kW input), I believe that
you'd have to pump 14.3 kW into a minimally efficient tower (281.7 mV/m/kW @
1 km) to achieve equivalent coverage.

-----
Dan Strassberg (dan.strassberg@att.net)
eFax 1-707-215-6367

----- Original Message ----- 
From: "Chris Hall" <chris2526@comcast.net>
To: <boston-radio-interest@lists.BostonRadio.org>
Sent: Tuesday, May 07, 2013 11:56 PM
Subject: OK, This Is A New One


According to Scott’s Tower site of the week before the Detroit Motower  (560
WHND) WKY was the tallest AM in the country with a Franklin at 961’ rebuilt
after a tornado took the original, they add two additional short towers for
the nighttime array, I did see the original when it was WKY AM-TV
As for WNAX, info from Scott and Garrett’s trip the 570 tower is 27’ shorter
than WKY at 934’ There has been a very interesting turn
of events at WNAX, it appears they have dumped the 5 kilowatt night DA array
and reverted to their original 1 KW NDN pre regional upgrade status
of the late 30’s back to non directional though now they have a slight power
increase at 1250 watts