Document 111 Tunable RF Inductors – 148 Series 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 M304 contains three samples each of the values shown 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 number1 Color 148-01J12L 148-02J12L 148-03J12L 148-04J12L 148-05J12L 148-06J12L 148-07J12L 148-08J12L 148-09J12L 148-10J12L 148-11J12L 148-12J12L 148-13J12L Brown Red Orange Yellow Green Blue Violet Gray White Black Brown Red Orange Turns 1½ 2½ 3½ 4½ 5½ 6½ 7½ 8½ 9½ 10½ 11½ 12½ 13½ no core 35 44 56 74 92 114 142 168 198 237 276 315 344 Inductance (nH)2 min3 nom max3 38 46 60 77 96 120 154 176 208 250 290 338 362 40 58 86 125 164 220 290 346 410 500 580 666 710 1. To order fixed inductance parts without cores, eliminate the “J12”, e.g. 148-13L. 2. 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. 3. L min measured with core halfway out top of form. L max measured with core centered in the windings. 4. Inductance values at 50 MHz calculated from Cp readings. Inductance values at 25 MHz read at standard Q meter frequency (blue line). 5. Core material: Carbonyl J. Core length: 3/8″. 6. Operating temperature range -40°C to +85°C. 7. Electrical specifications at 25°C. 39 52 73 101 130 170 222 262 310 375 435 500 540 Q min4 at L nom No core SRF min (MHz) 88 @ 50 MHz 96 @ 50 MHz 106 @ 50 MHz 112 @ 50 MHz 112 @ 50 MHz 112 @ 50 MHz 110 @ 50 MHz 106 @ 25 MHz 104 @ 25 MHz 90 @ 25 MHz 84 @ 25 MHz 66 @ 25 MHz 64 @ 25 MHz 3200 1560 1200 980 820 720 620 570 490 450 410 350 320 0.750 ±0.015 19,05 ±0,38 0.275 max 6,99 0.310 typ 7,87 0.300 max 7,62 0.190 typ 4,83 0.250 ±0.030 typ 6,35 ±0,76 22 AWG 0.360 ±0.010 9,14 ±0,25 0.198 ±0.010 5,03 ±0,25 Weight: 0.7 – 1.2 g Terminations: Tin-silver over copper Specifications subject to change without notice. Please check our website for latest information. © Coilcraft, Inc. 2007 Document 111 Revised 04/27/05