? coilcraft, inc. 2005 tunable rf inductors C 148 series document 111 specifications subject to change without notice. document 111 revised 11/26/02 with an overall height of only 0.300 , these tunable coils are ideal for applications where low-profile circuit boards are essential. the windings are precision molded in plastic to guarantee a constant winding pitch and a consistent relationship to the printed circuit board. tuning is done by means of a threaded carbonyl j core. coilcraft designer?s kit m104 contains three samples each of 13 standard values plus 20 values from the 132 series of low-profile, high q fixed inductors. to order, contact coilcraft or visit http://order.coilcraft.com . part inductance (nh) 1 q min 1 no core srf number color turns no core min 2 nom max at l nom min (mhz) 148-01j12 brown 1 ? 35 38 39 40 88 @ 50 mhz 3200 148-02j12 red 2 ? 44 46 52 58 96 @ 50 mhz 1560 148-03j12 orange 3 ? 56 60 73 86 106 @ 50 mhz 1200 148-04j12 yellow 4 ? 74 77 101 125 112 @ 50 mhz 980 148-05j12 green 5 ? 92 96 130 164 112 @ 50 mhz 820 148-06j12 blue 6 ? 114 120 170 220 112 @ 50 mhz 720 148-07j12 violet 7 ? 142 154 222 290 110 @ 50 mhz 620 148-08j12 gray 8 ? 168 176 262 346 106 @ 25 mhz 570 148-09J12 white 9 ? 198 208 310 410 104 @ 25 mhz 490 148-10j12 black 10 ? 237 250 375 500 90 @ 25 mhz 450 148-11j12 brown 11 ? 276 290 435 580 84 @ 25 mhz 410 148-12j12 red 12 ? 315 338 500 666 66 @ 25 mhz 350 148-13j12 orange 13 ? 344 362 540 710 64 @ 25 mhz 320 1. inductance and q readings taken on agilent/hp 4342-a q meter with 16 awg tinned copper 1/2 long soldered along leads and bent at 90 1/4 down from standoffs. 2. l min measured with core halfway out top of form. 3. inductance values at 50 mhz calculated from c p readings. inductance values at 25 mhz read at standard q meter frequency (blue line). 4. core material: carbonyl j. core length: 3/8 . 5. operating temperature range -40c to +85c. 6. electrical specifications at 25c. 0.275 6,99 max 0.300 7,62 max 22 awg 0.310 7,87 typ typ typ 0.190 4,83 0.750 0.015 19,05 0,38 0.250 0.030 6,35 0,76 0.360 0.010 9,14 0,25 0.198 0.010 5,03 0,25 weight: 0.7 ? 1.2 g
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