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 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.
0.750 ±0.015
19,05 ±0,38
0.310 typ
7,87
0.300 max
7,62
0.190 typ
4,83
0.275 max
6,99
0.250 ±0.030
typ
6,35 ±0,76
22 AWG
0.198 ±0.010
5,03 ±0,25
0.360 ±0.010
9,14 ±0,25
Weight:
0.7 – 1.2 g
Part
number
148-01J12
148-02J12
148-03J12
148-04J12
148-05J12
148-06J12
148-07J12
148-08J12
148-09J12
148-10J12
148-11J12
148-12J12
148-13J12
Color
Brown
Red
Orange
Yellow
Green
Blue
Violet
Gray
White
Black
Brown
Red
Orange
Turns
1
½
2
½
3
½
4
½
5
½
6
½
7
½
8
½
9
½
10
½
11
½
12
½
13
½
No core
35
44
56
74
92
114
142
168
198
237
276
315
344
Inductance (nH)
1
min
2
nom
38
46
60
77
96
120
154
176
208
250
290
338
362
39
52
73
101
130
170
222
262
310
375
435
500
540
max
40
58
86
125
164
220
290
346
410
500
580
666
710
Q min
1
at L nom
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
No core SRF
min (MHz)
3200
1560
1200
980
820
720
620
570
490
450
410
350
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 -40°C to +85°C.
6. Electrical specifications at 25°C.
Specifications subject to change without notice.
Document 111
Revised 11/26/02
© Coilcraft, Inc. 2005
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