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Path: ...!eternal-september.org!feeder3.eternal-september.org!news.eternal-september.org!.POSTED!not-for-mail From: Bill Sloman <bill.sloman@ieee.org> Newsgroups: sci.electronics.design Subject: Re: Practical resistor accuracy distribution Date: Sun, 28 Apr 2024 14:00:01 +1000 Organization: A noiseless patient Spider Lines: 21 Message-ID: <v0khk2$rmk5$1@dont-email.me> References: <v0hbbg$3us12$2@dont-email.me> <ilgo2jtvl18iqiv4t6eumqdkciu5rti2cg@4ax.com> <t2po2j9mif95u0lg1m6drskj54pf5dl27s@4ax.com> <00pq2jh2o2ru6qqlp4bs79f4bn5s95agu7@4ax.com> <ksqq2jthglli8duia5nd78scf6o0mv4nar@4ax.com> <l5sq2jp8a9ntpmlc8tqdslkscrcljednh7@4ax.com> <cqsq2j1q6e91a8jbeefuur8sfqgcso92db@4ax.com> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit Injection-Date: Sun, 28 Apr 2024 06:00:02 +0200 (CEST) Injection-Info: dont-email.me; posting-host="01858230f45e989aa1d995adc277cfad"; logging-data="907909"; mail-complaints-to="abuse@eternal-september.org"; posting-account="U2FsdGVkX19dsdQOs9ECG9IKvYbc4MRnNwb8FPsAayM=" User-Agent: Mozilla Thunderbird Cancel-Lock: sha1:54CUXijt4cZPeqC0DNZzfaC97Fw= In-Reply-To: <cqsq2j1q6e91a8jbeefuur8sfqgcso92db@4ax.com> Content-Language: en-US Bytes: 2299 On 28/04/2024 7:53 am, John Larkin wrote: > On Sat, 27 Apr 2024 17:41:10 -0400, Joe Gwinn <joegwinn@comcast.net>wrote >> On Sat, 27 Apr 2024 14:24:43 -0700, John Larkin <jjSNIPlarkin@highNONOlandtechnology.com> wrote: >>> On Sat, 27 Apr 2024 16:47:29 -0400, Joe Gwinn <joegwinn@comcast.net> wrote: >>>> On Fri, 26 Apr 2024 19:38:07 -0700, John Larkin <jjSNIPlarkin@highNONOlandtechnology.com> wrote: >>>>> On Fri, 26 Apr 2024 20:16:48 -0400, Joe Gwinn <joegwinn@comcast.net> wrote: >>>>>> On Sat, 27 Apr 2024 00:54:41 +0200, Klaus Vestergaard Kragelund <klauskvik@hotmail.com> wrote: > One could cal out tempcos, but test time would be outrageous. > > We are bidding on one unit that might need that. Yuk. The alternative > is to, basically, ovenize the PCB. Top-end crystal oscillators have been relying on that for decades now. Peltier junctions let you stabilise the board temperature close to room temperature, which can reduce long term drift. -- Bill Sloman, Sydney