Xref: utzoo sci.electronics:7811 rec.ham-radio:13294
Path: utzoo!utgpu!jarvis.csri.toronto.edu!rutgers!cs.utexas.edu!oakhill!dover!darla!waters
From: waters@darla.sps.mot.com (Strawberry Jammer)
Newsgroups: sci.electronics,rec.ham-radio
Subject: Re: RFI on telephone
Keywords: RFI radio telephone
Message-ID: <1870@dover.sps.mot.com>
Date: 18 Sep 89 15:36:23 GMT
References: <13681@well.UUCP>
Sender: news@dover.sps.mot.com
Reply-To: waters@darla.sps.mot.com (Strawberry Jammer)
Distribution: sci
Organization: Hacker's haven
Lines: 22

In article <13681@well.UUCP> nagle@well.UUCP (John Nagle) writes:
}
}      I've been receiving two local AM broadcast stations on my
}Western Electric Model 600 telephone.  I fixed the problem by 
}putting a 1000pF capacitor across two terminals within the phone
}that seemed to work.  (Putting it across the phone line didn't help,
}in fact, a dead short across the phone line turned the phone into a
}good radio!)  This seems a hokey solution to the problem.  Is there
}a more respectable one?

Considering that the problem comes from audio level setting diodes within the
telephone set itself I would hardly call your solution "hokey". The only
"hokey" thing about it is a manufacturer who blithely assumes that RFI is
rare just because it was 50 years ago!

So long as the fix and the phone work I would just go on using it! You might
try ferrite beads on the wires to the phone as well if the capacitor isn't
enough too.


           *Mike Waters    AA4MW/7  waters@dover.sps.mot.com *
Take it easy, we're in a hurry.