© Coilcraft, Inc. 2007
Specifications subject to change without notice.
Please check our website for latest information.
Tunable RF Inductors – 148 Series
Document 111
Document 111
Revised 04/27/05
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 guaran-
tee a constant winding pitch and a consistent relation-
ship 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
Inductance (nH)2
Q min4
No core SRF
number1
Color
Turns
no core
min3
nom
max3
at L nom
min (MHz)
148-01J12L
Brown
1
½
35
38
39
40
88 @ 50 MHz
3200
148-02J12L
Red
2
½
44
46
52
58
96 @ 50 MHz
1560
148-03J12L
Orange
3
½
56
60
73
86
106 @ 50 MHz
1200
148-04J12L
Yellow
4
½
74
77
101
125
112 @ 50 MHz
980
148-05J12L
Green
5
½
92
96
130
164
112 @ 50 MHz
820
148-06J12L
Blue
6
½
114
120
170
220
112 @ 50 MHz
720
148-07J12L
Violet
7
½
142
154
222
290
110 @ 50 MHz
620
148-08J12L
Gray
8
½
168
176
262
346
106 @ 25 MHz
570
148-09J12L
White
9
½
198
208
310
410
104 @ 25 MHz
490
148-10J12L
Black
10
½
237
250
375
500
90 @ 25 MHz
450
148-11J12L
Brown
11
½
276
290
435
580
84 @ 25 MHz
410
148-12J12L
Red
12
½
315
338
500
666
66 @ 25 MHz
350
148-13J12L
Orange
13
½
344
362
540
710
64 @ 25 MHz
320
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.
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
Terminations: Tin-silver over copper
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