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Path: ...!weretis.net!feeder9.news.weretis.net!news.quux.org!eternal-september.org!feeder3.eternal-september.org!news.eternal-september.org!eternal-september.org!.POSTED!not-for-mail From: Christopher Howard <christopher@librehacker.com> Newsgroups: sci.electronics.design Subject: Re: signal leads that pick up less ambient noise? Date: Tue, 25 Feb 2025 08:39:55 -0900 Organization: A noiseless patient Spider Lines: 17 Message-ID: <871pvlsz2s.fsf@librehacker.com> References: <87cyfd3hpz.fsf@librehacker.com> <k1acrj172rnjg5i2su95ovs9f0vcnjn69p@4ax.com> <8734g9qzgu.fsf@librehacker.com> <vp7o6f$2stuq$4@dont-email.me> <87tt8onssh.fsf@librehacker.com> <vp9hc3$3b68q$1@dont-email.me> <87a5afnsh1.fsf@librehacker.com> <vpad2m$1ndv$1@nnrp.usenet.blueworldhosting.com> <87wmdjm7pg.fsf@librehacker.com> <mjkhrjpt9q427bkb8rvtqe7aeugta3q43e@4ax.com> <87seo7m33b.fsf@librehacker.com> <7u2irj1m59u6974v5mndoa080o0c5ci4bj@4ax.com> <878qpvme0h.fsf@librehacker.com> <vpjed8$1nanm$1@dont-email.me> MIME-Version: 1.0 Content-Type: text/plain Injection-Date: Tue, 25 Feb 2025 18:40:11 +0100 (CET) Injection-Info: dont-email.me; posting-host="7a70de8458681e309ccc7b0b33147cbe"; logging-data="2227887"; mail-complaints-to="abuse@eternal-september.org"; posting-account="U2FsdGVkX18ALEeWxXR+DyI30W8F96fI7BZUmNHDpic=" User-Agent: Gnus/5.13 (Gnus v5.13) Cancel-Lock: sha1:FNhghH5NsThLuT4FDVsUJRg8DvQ= sha1:dp9GufEpwx/azeKdJr8n+G2gVwI= Bytes: 2184 Bill Sloman <bill.sloman@ieee.org> writes: > On 25/02/2025 4:46 am, Christopher Howard wrote: >>> Google for coaxial feed through capacitors. > Capacitors and resistors don't ring. Adding inductance can introduce > ringing. but enough resistance can make the resonant circuit > critically damped and the voltages and current will decay > monotonically. So, when you use a coaxial feed through capacitors on your faraday cage, do you add a resistor right after the capacitor, to reduce/eliminate ringing? Or are you just trying that all your inputs on the board have resistors before whatever op amps or other components that they feed into? -- Christopher Howard