On Mon,3/27/2017 4:46 AM, Richard (Rick) Karlquist wrote:
I have measured various competitor's
"equivalents" to material 43 and the found
that they are considerably lossier.
For common mode chokes, lossier is better. But so is the shape of the
curve of loss vs. frequency, and so is resonant frequency. You either
need to wind chokes and measure them or have graphs of mu' and mu'' vs
frequency to compare with the Fair-Rite materials. Laird's website
appears to be totally inscrutable with any of this, FAR, FAR, FAR behind
Fair-Rite's. Laird's seems to have been done by a data guy, Fair-Rite's
by an applications engineer who actually understands what's needed to
choose a part and design using it.
73, Jim K9YC
_______________________________________________
_______________________________________________
TowerTalk mailing list
TowerTalk@contesting.com
http://lists.contesting.com/mailman/listinfo/towertalk
|