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Radio
Broadcast Technical Consulting and Sales |
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Nott Ltd. |
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Unipoles to Detune Structures |
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If you ever
encounter a situation like this, you have a problem. The water tower
was built just 600 feet from the KBUN-AM Radio tower at Bemidji, MN in the
winter of 2003. Their telephone number
is 218-444-1500.
The water tower and the radio tower are each about 170 feet tall. The two form a directional pattern for the AM station and the directional problem must be dealt with. Click on the photo for a larger image. |
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A Nott
Ltd. unipole 6-wire detuning system was added to the water
tower. The bottom of the unipole is 14 feet off the ground to
prevent vandalism. Here, one down-lead wire is tensioned and run
into the interior of the tower via a feed-thru insulator. Click on the photo for a larger image. |
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The water tower, as
seen from the outside. One of the six down-lead wires is visible on
the lower left side of the tower. The wires go up to and attach to
the bottom of the bowl assembly. Click on the photo for a larger image. |
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There is a tuning
box in the center of the tower. Note that there are two wires going
to the box from each of six directions. The top six are connected to
the six skirt wires on the outside of the tower. The bottom six are
ground wires leading in from electrical terminals in the wall of the water
tower. These terminals are bonded to the metal rebar in the concrete
walls of the water tower. We had welders bond the rebar during the
construction process. Above the tuning box are four black nylon
lines that suspend the tuning box in mid-air in the center of the water
tower. Click on the photo for a larger image. The detuning system worked. This is just another example of M. W. Persons and Associates doing problem solving in the radio broadcast field. |
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Find KBUN/KBHP/KKZY/KLLZ
Radio on the Web at
http://www.paulbunyanbroadcasting.com |
page last edited 11/14/2010
