On 12/29/2010 06:38, W8DIZ posted:
use this link to calculate inductance for an unknown toroid/binocular http://kitsandparts.com/fluxbb/viewtopic.php?pid=601#p601
Note that binoculars made with -43 material are not spec'ed by FAIR-RITE to have a specific inductance.
I have received different versions fro fair-rite where the AL value was twice a previous versions AL value. Only the IMPEDANCE is spec'ed by FAIR_RITE