Warning: mysqli::__construct(): (HY000/1203): User howardkn already has more than 'max_user_connections' active connections in D:\Inetpub\vhosts\howardknight.net\al.howardknight.net\includes\artfuncs.php on line 21
Failed to connect to MySQL: (1203) User howardkn already has more than 'max_user_connections' active connections
Warning: mysqli::query(): Couldn't fetch mysqli in D:\Inetpub\vhosts\howardknight.net\al.howardknight.net\index.php on line 66
Article <vng14g$2vlfc$1@dont-email.me>
Deutsch   English   Français   Italiano  
<vng14g$2vlfc$1@dont-email.me>

View for Bookmarking (what is this?)
Look up another Usenet article 
Path: ...!eternal-september.org!feeder3.eternal-september.org!news.eternal-september.org!eternal-september.org!.POSTED!not-for-mail
From: piglet <erichpwagner@hotmail.com>
Newsgroups: sci.electronics.design
Subject: Re: Question about Oxley RFI suppression filters FLTM/P/5000
Date: Thu, 30 Jan 2025 14:08:16 -0000 (UTC)
Organization: A noiseless patient Spider
Lines: 20
Message-ID: <vng14g$2vlfc$1@dont-email.me>
References: <679b8455$0$539$426a74cc@news.free.fr>
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
Injection-Date: Thu, 30 Jan 2025 15:08:17 +0100 (CET)
Injection-Info: dont-email.me; posting-host="911f4f59aaf425d366a92c09f8ec957b";
	logging-data="3134956"; mail-complaints-to="abuse@eternal-september.org";	posting-account="U2FsdGVkX1+19AP4XIkW1Kcn8h9jOgEl"
User-Agent: NewsTap/5.5 (iPhone/iPod Touch)
Cancel-Lock: sha1:qx8Pb9dAxCD0JjGvQ6mgUJtAxQA=
	sha1:1Nb/BOHqsQ7PHBv5zeLJZdekwOQ=
Bytes: 1860

Jean-Pierre Coulon <coulon@cacas.pam.oca.eu> wrote:
> I have put some on an amplifier box for my + and 5 V supplies. But yet a 
> ripple on either supply signically contaminates my outut signal.
> 
> AFAIK they represent a 6-uH series inductor and an about 5-nF parallel 
> capacitor. Is this inductor a coil or a toroid? If it is a coil it could 
> radiate a signficant magnetic field, contaminating my input signal.
> 
> Regards

Sorry I don’t know the internal construction but suspect the inductor is
possibly not a coil but merely the central conductor passing through a
ferrite sleeve. In those feedthroughs the capacitors are often annular too
so nothing is left to chance.

You haven’t said what the frequency is of the ripple that you observe,
those devices will have negligible effect at powerline frequency.

-- 
piglet