IRON POWDER TOROIDAL CORES
(For Resonant Circuits)
 

MATERIAL 1 -- Permeability 20, Freq. Range 0.5 MHz to 5 MHz, Color - Blue
Core Number O.D.
(inches) 		I.D.
(inches) 		Hgt
(inches) 		X
(cm) 		Ae
(cm)2 		Ve
(cm)3 		AL Value
µh/100 Turns
T12-1 .125 .062 .050 .74 .010 .007 48
T16-1 .160 .078 .060 .95 .016 .015 44
T20-1 .200 .088 .070 1.15 .025 .029 52
T25-1 .255 .120 .096 1.50 .042 .063 70
T30-1 .307 .151 .128 1.83 .065 .119 85
T37-1 .375 .205 .128 2.32 .070 .162 80
T44-1 .440 .229 .159 2.67 .107 .286 105
T50-1 .500 .303 .190 3.03 .121 .367 100
T68-1 .69 .370 .190 4.24 .196 .831 115
T80-1 .795 .495 .250 5.15 .242 1.246 115
T94-1 .942 .560 .312 6.00 .385 2.310 160
T106-1 1.060 .570 .437 6.50 .690 4.485 325
T130-1 1.300 .780 .437 8.29 .730 6.052 200
T157-1 1.570 .950 .570 10.05 1.140 11.457 320
T184-1 1.840 .950 .710 11.12 2.040 22.685 500
T200-1 2.000 1.250 .550 12.97 1.330 17.250 250

Note:

 
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