Thought the following excerpt might be of use when tracking down which local AM
broadcast station you may need to notch out in order to hear well on 160m...
-- Tom
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>
> THE CGC COMMUNICATOR
> CGC #580
> Tuesday, June 24, 2003
> ________
> Robert F. Gonsett, W6VR, Publisher
> <rgonsett@ieee.org>
> Stephen H. Blodgett, W7RNA, Letters Editor
> mailto:steve@earthsignals.com
> Copyright 2003, Communications General? Corporation (CGC)
>------------------------------------------------------------------
>
> DETERMINE AM & FM SIGNAL STRENGTHS AT SPECIFIC ZIP CODES
>
> A free service from V-Soft Communications lets you determine
>which AM & FM radio signals should be receivable at a given zip
>code; not only that, but the program ranks the stations by field
>strength and lists the strengths. Directional antenna patterns
>are taken into account during the calculation process.
>
> According to Doug Vernier, the AM tool was added to their
>existing FM-only prediction service after a year-long effort,
>and the company went to great lengths to make the predicted field
>strengths as accurate as possible. Note that only daytime AM
>groundwave signals are computed.
>
> Let's try a sample calculation. Visit the URL at the bottom
>of this story and input the zip code 91602 (N. Hollywood, CA).
>Note that KKBT(FM) outperforms KPFK and KBIG. How could a
>relatively low powered Mt. Wilson station be stronger than the
>big guns at the same site? Simple. The FCC CDBS database, used
>by V-Soft's program, thinks KKBT is on Briarcrest instead of Mt.
>Wilson!
>
> If you find other CDBS errors, let the FCC know. Your station
>is not receiving full protection if its parameters are listed
>incorrectly. Hopefully the KKBT error will be fixed soon.
>
> http://www.v-soft.com/ZipSignal/default.asp
>
>------------------------------------------------------------------
>
> The CGC Communicator is published for broadcast engineering
> professionals in so. California by Communications General?
> Corporation (CGC), consulting radio engineers, Fallbrook, CA.
>
> Short news items are always welcome from our readers,
> and letters may be edited for brevity and clarity. Letters
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> courtesy of Bext Corporation.
>
> The views expressed in our newsletters do not necessarily
> reflect those of Communications General? Corporation, Bext,
> or the newsletter editors.
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e-mail: frenaye@pcnet.com YCCC --> http://www.yccc.org/
Tom Frenaye, K1KI, P O Box J, West Suffield CT 06093 Phone: 860-668-5444
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