T a b l e 2.
12 d B / O c t a v e
B l a n k C r o s s o v e r C a r d
C o m p o n e n t V a l u e s
Resistors are all
%
W, 5% tolerance. Capacitors are all 5%
tolerance, metalized polyester.
WARNING:
This section of the manual contains service instructions for
use by qualified service personnel only.
Crossover
Frequency
(Hz)
Capacitors
C 1 - C 5 '
(MF)
Resistors
R 1 - R 5 '
(kn)
50
.22
10
70
.22
7.5
100
.22
4.7
200
.12
4.7
300
.082
4.7
400
.055
5.1
600
.039
4.7
700
.032
5.1
900
.027
4.7
1 100
.022
4.7
1500
.012
6.2
2000
.012
4.7
2500
.0082
5.6
3000
.0068
5.6
3500
.0068
4.7
4000
.0056
5.1
4500
.0039
6.2
5500
.0033
6.2
6000
.0033
5.6
6500
.0033
5.1
7500
.0027
5.6
8000
.0027
5.1
8500
.0012
11
9000
.0022
5.6
9500
.0012
10
10000
.0022
5.1
T h e c o m p o n e n t v a l u e s f o r o t h e r c r o s s o v e r f r e q u e n c i e s c a n b e c a l c u -
l a t e d u s i n g t h e f o r m u l a R C = w h e r e R is t h e r e s i s t a n c e in
kn,
C is t h e c a p a c i t a n c e in nF. a n d F is t h e f r e q u e n c y in H z T h e r e c -
o m m e n d e d m i n i m u m v a l u e f o r R is 4 . 7 k O .
Figure 6.
12 dB/Octave Blank Crossover Card (JBL Model
52-5120)
Component values for the various frequencies are listed in
Table 2. Components should rest against the printed circuit
board. Leads should be soldered and cut flush.
T a b l e 3.
18 d B / O c t a v e
B l a n k C r o s s o v e r C a r d
C o m p o n e n t V a l u e s
Resistors are all
%
W, 5% tolerance. Capacitors are all 5%
tolerance, metalized polyester.
Crossover Frequency
Capacitors
Resistors
30 Hz
C V - N / A
R V - N / A
(High Pass O n l y ]
C 2 ' - N / A
R 2 ' - N / A
C 3 ' - N / A
R 3 ' - N / A
C 4 ' - . 3 3 uF
R 4 ' - 1 1
kn
C 5 ' - . 3 3 nF
R 5 ' - 4 . 3
kn
C 6 ' - . 3 3 MF
R 6 ' - 7 5
kn
250 Hz
C 1 ' - . 0 1 5 MF
R1 ' - 5 . 6
kn
C 2 ' - . 3 9
M
F
R 2 ' - 5 . 6
kn
C 3 ' - . 0 2 2 ^F
R 3 ' - 5 . 6
kn
C 4 ' - . 0 3 9
M
F
R 4 ' - 1 2
kn
C 5 ' - . 0 3 9 nF
R 5 ' - 4 . 7
kn
C 6 ' - . 0 3 9 uF
R 6 ' - 8 2
kn
500 Hz
S a m e a s J B L C r o s s o v e r C a r d 5 1 - 5 1 3 2 .
S e e T a b l e 5. f o r v a l u e s .
800 Hz
S a m e a s J B L C r o s s o v e r C a r d 5 1 - 5 1 3 3 .
S e e T a b l e 5. f o r v a l u e s .
1200 Hz
C1 ' - . 0 3 9
M
F
R1 '-4.7
kn
C 2 ' - . 1 0 MF
R 2 ' - 4 . 7
kn
C 3 ' - . 0 0 5 6 MF
R 3 ' - 4 . 7
kn
C 4 ' - . 0 0 8 2 MF
R 4 ' - 1 2
kn
C 5 ' - . 0 0 8 2
M
F
R 5 ' - 4 . 7
kn
C 6 ' - . 0 0 8 2
M
F
R 6 ' - 8 2
kn
5500 Hz
C1 ' - . 0 0 6 8
M
F
R1 ' - 5 . 6
kn
C 2 ' - . 0 1 8 uF
R 2 ' - 5 . 6
kn
C 3 ' - . 0 0 1 JJF
R 3 ' - 5 . 6
kn
C 4 ' - . 0 0 1 8 MF
R 4 ' - 1 2
kn
C 5 ' - . 0 0 1 8
m
F
R 5 ' - 4 . 7
kn
C 6 ' - . 0 0 1 8 fjF
R 6 ' - 8 2
kn
8000 Hz
C 1 ' - . 0 0 5 6 uF
R1 ' - 4 . 7
kn
C 2 ' - . 0 1 5
iiF
R 2 ' - 4 . 7
kn
C 3 ' - 8 2 0 pF
R 3 ' - 4 . 7
kn
C 4 ' - . 0 0 1 2 uF
R 4 ' - 1 2
kn
C 5 ' - . 0 0 1 2
M
F
R 5 ' - 4 . 7
kn
C 6 ' - . 0 0 1 2
,iF
R 6 ' - 8 2
kn
10
Содержание 5233
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