JMK
Active member
Sorry,
Yes i know i know this has been up a few times
but if the AL value of the original core is 876μH then it can not be an MPP core right?
If i bought an MPP core approx. the same size as the original OD. 23mm ID. 14mm H 8mm
Link: https://www.mag-inc.com/Media/Magnetics/Datasheets/C055306A2.pdf
the highest AL value i could find would be 396 + - 8%
I guess that MPP cores sound better?
but i would need to do a lot of turns i guess.
please correct me if im wrong!
Data on the original pultec inductor:
The core is black.
The dimensions are as follows:
Outside diameter: 23mm
Inside Diameter: 14mm
Height: 8mm
AL value of the core is 876μH. Test this by wrapping 100 turns around your core, then measure the
inductance.
The wire gauge is #34AWG
Calculated turns are as follows:
32.2mH 606 turns
50.9mH add 156 extra turns
84.1mH add 218 extra turns
98mH add 78 extra turns
147.5mH add 240 extra turns
Turns formula:
N=100 x SQR(L/AL)
Where:
L= desired inductance in μH
AL= AL value in μH
So, for the 32.2mH tap...
N= 100 x SQR(32200/876)
N= 100 x SQR(36.75799)
N= 100 x 6.06284
Yes i know i know this has been up a few times
but if the AL value of the original core is 876μH then it can not be an MPP core right?
If i bought an MPP core approx. the same size as the original OD. 23mm ID. 14mm H 8mm
Link: https://www.mag-inc.com/Media/Magnetics/Datasheets/C055306A2.pdf
the highest AL value i could find would be 396 + - 8%
I guess that MPP cores sound better?
but i would need to do a lot of turns i guess.
please correct me if im wrong!
Data on the original pultec inductor:
The core is black.
The dimensions are as follows:
Outside diameter: 23mm
Inside Diameter: 14mm
Height: 8mm
AL value of the core is 876μH. Test this by wrapping 100 turns around your core, then measure the
inductance.
The wire gauge is #34AWG
Calculated turns are as follows:
32.2mH 606 turns
50.9mH add 156 extra turns
84.1mH add 218 extra turns
98mH add 78 extra turns
147.5mH add 240 extra turns
Turns formula:
N=100 x SQR(L/AL)
Where:
L= desired inductance in μH
AL= AL value in μH
So, for the 32.2mH tap...
N= 100 x SQR(32200/876)
N= 100 x SQR(36.75799)
N= 100 x 6.06284
