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

[EDWARDS, EDDIE J" <eedwards@oppd.com (EDWARDS, EDDIE J)]

> -----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


--
FAQ on WWW:               http://www.contesting.com/FAQ/rfi
Submissions:              rfi@contesting.com
Administrative requests:  rfi-REQUEST@contesting.com
Questions:                owner-rfi@contesting.com