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From: Jeroen Belleman <jeroen@nospam.please>
Newsgroups: sci.electronics.design
Subject: Re: 80dB now but still needs improvement at 1KHz
Date: Wed, 6 Nov 2024 23:23:16 +0100
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On 11/6/24 23:15, Liz Tuddenham wrote:
> john larkin <jl@glen--canyon.com> wrote:
> 
> [...]
>> It's interesting that the classic filters (Butterworth, Chebychev,
>> Cauer) are based on mathematical approximations that pre-date
>> electronics. They were used to compose tables for artillery or
>> something.
> 
> Chebychef did his calculations on the mechancal lnkages used to operate
> the valves of steam locomotives, generating linear motion and sharp
> movement from the superimposed effects of rotary motions.

Did he indeed? Interesting. Do you perchance have a reference?

Thanks,
Jeroen Belleman