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From: Phil Hobbs <pcdhSpamMeSenseless@electrooptical.net>
Newsgroups: sci.electronics.design
Subject: Re: An 1897 Curve Tracer??
Date: Mon, 14 Apr 2025 18:47:12 -0000 (UTC)
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piglet <erichpwagner@hotmail.com> wrote:
> Cursitor Doom <cd@notformail.com> wrote:
>> Seems there was! I'm just wondering, since thermionic valves and
>> semiconductors were yet to be invented, just what the hell they were
>> generating curves of? Anyone care to hazard a guess?
>> 
> 
> Must have been some interest in non-linear resistances. There were
> electrolytic rectifiers around about that timeframe too, I recall a 1908
> book describing them for battery charging.
> 

Transformers, alternators, and so forth.   Power factor, dissipation,
saturation, coercivity,….

Cheers 

Phil Hobbs 

-- 
Dr Philip C D Hobbs  Principal Consultant  ElectroOptical Innovations LLC /
Hobbs ElectroOptics  Optics, Electro-optics, Photonics, Analog Electronics