IRON POWDER TOROIDAL CORES
(For Resonant Circuits)
 
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MATERIAL 15-- Permeability 25, Freq. Range 0.1 MHz to 2.0 MHz, Color - Red & White
Core Number O.D.
(inches) 		I.D.
(inches) 		Hgt
(inches) 		le
(cm) 		Ae
(cm)2 		Ve
(cm)3 		AL Value
µh/100 Turns
T12-15 .125 .062 .050 .74 .010 .007 50
T16-15 .160 .078 .060 .95 .016 .015 55
T20-15 .200 .088 .070 1.15 .025 .029 65
T25-15 .255 .120 .096 1.50 .042 .063 85
T30-15 .307 .151 .128 .183 .065 .119 93
T37-15 .375 .205 .128 2.32 .070 .162 90
T44-15 .440 .229 .159 2.67 .107 .286 160
T50-15 .500 .303 .190 3.03 .121 .367 135
T68-15 .690 .370 .190 4.24 .196 .831 180
T80-15 .795 .495 .250 5.15 .242 1.246 170
T94-15 .942 .560 .312 6.00 .385 2.310 200
T106-15 1.060 .570 .437 6.50 .690 4.485 345
T130-15 1.300 .780 .437 8.29 .730 6.052 250
T157-15 1.570 .950 .570 10.05 1.140 11.457 360



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