Re: those coupled drum core inductors

Jeroen Belleman <jeroen@nospam.please> wrote:

On 3/16/25 15:15, john larkin wrote:

 
 
https://www.dropbox.com/scl/fi/cd8gxmlrar3kvv3iz36xe/Mu_twin.jpg?rlkey=d
vl8e7fbtjnzz3l9q9urkyyfn&raw=1
 
https://www.dropbox.com/scl/fi/nm1ksdn7eufm90ol0b0ec/Murata_Coupled_1.jp
g?rlkey=e7yvk464xupz4axy7lt6zj3zk&raw=1
 
I was surprised to get K=0.6 by just putting them along side.
 

 
That's somewhat surprising, indeed. Are the cores dumbbell-shaped? Does
the coupling vary steeply with the spacing?

Stick a sig-gen across one and a 'scope across t'other, that will tell
you how much coupling there is at any given spacing.


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