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[RFI] Re: Radio Frequency Interference (RFI) Digest V3 #89

To: <rfi@contesting.com>
Subject: [RFI] Re: Radio Frequency Interference (RFI) Digest V3 #89
From: EDWARDS, EDDIE J" <eedwards@oppd.com (EDWARDS, EDDIE J)
Date: Fri, 8 Dec 2000 14:07:30 -0600


> -----Original Message-----
> From: J. Bradshaw [SMTP:ac6tk@cybertime.net]
> I have been able to get rid of the 2 and 6 interference with a twin-lead 
> type hi-pass filter, but I am using coax now so it's back.
> 
        This reminds me of something I read somewhere.  Sometimes it helps
to use a twin-lead HP filter even on cable systems.  To do this, put an
75-300 ohm impedance transformer on each side of the filter.  This provides
isolation and filtering to cope with both common mode & differential mode
RFI signals.

        Not sure if this will help with F.O. but it's worth a try.

        73,
        de ed -K0iL


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