Is it possible that those tow inductors in the picture are 1.2mH and 4mH?
No I do't have possession of the board in the photo, but I am sure that the number of turns range from 80 to 100
I look at this, from: https://www.electronics-tutorials.com/basics/toroids.htm
TYPE COLOR AL Freq. Range
T50-26 Yel-Wh 320uH power freq.
T50-3 Gray 175 50 Khz to 500 Khz
T50-1 Blue 100 500 Khz to 5 Mhz
T50-2 Red 57 2 Mhz to 30 Mhz
T50-6 Yellow 47 10 to 50 Mhz
T50-10 Black 32 30 to 100 Mhz
If AL = 320 , I have to wound 350 turns to get 4mH, no one of the inductors in the above photo seem to be 350 turns???
your AL values seem to be 10x of what are usually quoted for T50-x mix toroids
Do re-check your units & formulas
cheers!
Are you sure?
if yes your answer was the best
thanks
This calculator;
**broken link removed**
is the best one I know; download it and experiment.
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