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From: John R Walliker <jrwalliker@gmail.com>
Newsgroups: sci.electronics.design
Subject: Re: big L
Date: Tue, 17 Dec 2024 21:00:31 +0000
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On 17/12/2024 15:44, john larkin wrote:
> On Tue, 17 Dec 2024 15:30:30 +0000, liz@poppyrecords.invalid.invalid
> (Liz Tuddenham) wrote:
> 
>> john larkin <JL@gct.com> wrote:
>>
>>> What's the biggest inductor, the most Henries, that you know of? I
>>> seem to recall some audio transformer that was something like 100 H.
>>
>> There some pretty big ones in the nearby substation but I can't get near
>> enough to read the rating plates.
> 
> They probably wouldn't state the inductance.
> 
> One outfit that makes utility transformer test sets say that their
> gadgets measure up to 10H. I was hoping to find something outrageous.
> 
> Hammond makes a 200H inductor. It is NOT good for 30 amps!
> 
> https://www.digikey.com/en/products/detail/hammond-manufacturing/193A/16939893

The superconducting magnets used in MRI machines have a very high
inductance.  I have seen values between 50 and 100H quoted.

John