Re: big L

John R Walliker <jrwalliker@gmail.com> wrote:

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
 
 

I have seen test bridges with scales going up to 1kH - the highest value I
have personally encountered was ca 150H


--
piglet