To: <topband@contesting.com>
>Date: Tue, 30 Sep 1997 14:38:02 -0500
>From: Keith Morehouse <blckhole@ripco.com>
>
>The recent ANC-4 thread prompts me to ask a question I've been pondering
>for quite a while.
>
>What's the collective wisdom on the potential of one of these phase type
>noise canceller in getting rid of broadband hash generated by local
>broadcast stations ? I don't necessarily mean AM broadcast - I'm
>including SW broadcast stations, also.
>
>I have a situation where there is a high power SWBC station,
>transmitting on multiple frequencies, close to a site. There is
>broadband noise covering most of the 1-30 MHz spectrum, worse at some
>frequencies, that I believe may be BC transmitter phase noise related.
>
>Anybody want to take an educated guess at how effective phase
>cancellation, using a sense antenna, would be in this situation ?
>
Keith,
I'll stick my neck out here and guess that the nuller stands a chance of
helping you out. I think that since your noise source is local and the
propagation isn't via sky-wave, If the SWBC station doesn't wipe out the
nuller front end, it may be able to do you some good. It would be useless
against a sky-wave signal though.
73 Eric N7CL
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