IRON POWDER TOROIDAL CORES
(For Resonant Circuits)
 
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MATERIAL 17-- Permeability 4, Freq. Range 20 MHz to 200 MHz, Color - Blue & Yellow
Core Number O.D.
(inches) 		I.D.
(inches) 		Hgt
(inches) 		le
(cm) 		Ae
(cm)2 		Ve
(cm)3 		AL Value
µh/100 Turns
T12-17 .125 .062 .050 .74 .010 .007 7.5
T16-17 .160 .078 .060 .95 .016 .015 8.0
T20-17 .200 .088 .070 1.15 .025 .029 10.0
T25-17 .255 .120 .096 1.50 .042 .063 12.0
T30-17 .307 .151 .128 .183 .065 .119 16.0
T37-17 .375 .205 .128 2.32 .070 .162 15.0
T44-17 .440 .229 .159 2.67 .107 .286 18.5
T50-17 .500 .303 .190 3.03 .121 .367 18.0
T68-17 .690 .370 .190 4.24 .196 .831 21.0
T80-17 .795 .495 .250 5.15 .242 1.246 32.0
T90-17 .942 .560 .312 6.00 .385 2.310 32.0



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