Article View: sci.electronics
Article #20869Re: 60 Hz hum filter
From: Mikie
Date: Thu, 23 Feb 1989 20:30
Date: Thu, 23 Feb 1989 20:30
30 lines
1853 bytes
1853 bytes
In article <2322@rayssdb.ray.com> iws@rayssdb.ray.com (Ihor W. Slabicky) writes:
>In article <2313@rayssdb.ray.com>, iws@rayssdb.ray.com (Ihor W. Slabicky) writes:
>>
>> Can anyone send me a schematic or info on broadband noise filters
>> that will filter out 60 Hz hum on the 120VAC line?
>
>Well, thanks to everyone who responded. The two problems suggested are:
>
>1 - a ground loop or faulty cables.
>2 - filtering capacitors
Rats! I was hoping someone wound mail a realy useful reply to this
one. I have the same (similar?) problem when I hook up my Mac to the
Stereo via the Mac's audio digitizer. Everything I playback has a
terrible 60/120 hz. hum in it. Sure, the filter caps on the mac
aren't the greatest, but there still good, and besides, replacing them
with mega-farad caps would void the warranty. I was hoping someone
would mail in the schematics so's I could build an in-line, black box
trap to clip everything below 120hz.
Rats!
2
/\/\
Computer Virus: n., pl. -ruses. 1) Any of various post-compilation pathogens
consisting essentially of a core of hexadecimal characters surrounded by a
benign software coat, having the ability to fit through a pinhole in the
condom of security and replicate within a computing environment.
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<70715@ti-csl.csc.ti.com>Path:
arc1-ca.pugleaf.net!utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!tut.cis.ohio-state.edu!rutgers!bellcore!texbell!killer!pollux!ti-csl!home!myjakReferences:
<2313@rayssdb.ray.com> <2322@rayssdb.ray.com>Show Full Headers
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Path: arc1-ca.pugleaf.net!utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!tut.cis.ohio-state.edu!rutgers!bellcore!texbell!killer!pollux!ti-csl!home!myjak From: myjak@home.csc.ti.com (Mikie) Newsgroups: sci.electronics,rec.audio,rec.ham-radio Subject: Re: 60 Hz hum filter Keywords: any ideas Message-ID: <70715@ti-csl.csc.ti.com> Date: 23 Feb 89 20:30:20 GMT References: <2313@rayssdb.ray.com> <2322@rayssdb.ray.com> Sender: news@ti-csl.csc.ti.com Reply-To: myjak@home.UUCP (Mikie) Followup-To: sci.electronics Organization: TI Computer Science Center, Dallas Lines: 30