A few weeks ago I looked at four broadcast ATUs that had been removed
from a four tower DA. These were designed for 1 kw by KIntronic.
Each was in a wx proof aluminum cabinet about the size of a 3 or 4
drawer file cabinet. Among the tuning components and switches were
large chokes, one in each of the ATUs. They were about 2 feet long
and 2 inches diameter with what looked like no.20 copper wire (enamel)
wound on them. I had never seen such huge chokes in any kind of
average radio environment before and wondered what sort of function
they could have in a matching network. "Static discharge. They're
connected between hot and ground. Bleeds off tower charge build-up,"
I was told.
73,
Rob K5UJ
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