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Re: What Donna said

At 09:40 PM 8/18/99 -0400, you wrote:
>Well, I never said I got WBZ well-- I just said I got it, and I did, very 
>faintly, coming in over some other very faint stations at 1030-- this was 
>at about midnight, so perhaps the WCTS folks sign off at night?
Possible. WCTS is 50 kW-D/1 kW-N DA-2. The TX is located southeast of St
Paul (COL is Maplewood). Day pattern (two towers) is a modified cardioid
with two nulls--possibly to protect WBZ and KTWO from daytime skywave. Most
signal goes northwest or north-northwest, so coverage of the Twin Cities
during the day should be excellent.

The night pattern (five towers in-line) is a fairly fat teardrop with the
azimuth of the radiation maximum northwest or north-northwest across St
Paul. (Actually it's a pretty tight teardrop for five towers--most teardrop
patterns use at least six towers. If I recall, the WCTS towers are only 70
degrees apart, which may explain the tightness of the pattern. In an in-line
array, wider spacing between towers usually widens the pattern.)
Minneapolis, which I guess is west of St Paul, is kind of alongside the
pattern rather than right in it. If you were trying to pick up WBZ anywhere
in about a 210-degree arc to the east, south, or southwest of the WCTS TX,
you probably wouldn't have to be more than a couple of miles from the TX to
be able to null out WCTS and pick up WBZ.

- -------------------------------
Dan Strassberg (Note: Address is CASE SENSITIVE!)
ALL _LOWER_ CASE!!!--> dan.strassberg@worldnet.att.net
(617) 558-4205; Fax (617) 928-4205