Page 1
0
1
2
3
4
5
6
7
8
R1
A A
*
Mic. Capsule
B B
C C
D D
red black
R5
1 G 1 G
white
C9
22nF
*
C4
1.0nF
R6
G
R7
*
240k
R10
*
270k
R9
1.0M
Ω
C11
D
S
Ω
Ω
R2
2.2k
Ω
Q2
2SK170
(GR or BL)
R11
2.2k
Ω
red
~ +12 V
R12
1.5k
Ω
C1
330nF
50 V Plastic Film
R4
6.2k
Ω
C5
220uF-POL
16 V
*
C10
330nF
50 V Plastic Film
~ +38 V
C6
47uF-POL
50 V
R3
150k
R8
150k
Ω
Ω
Q1
2N5087
*
C3
1.0nF
50 V
*
C7
1.0nF
50 V
Q3
2N5087
D1
1N4735A
6.2 V
D2
1N4735A
6.2 V
20
R13
20
Ω
Ω
XLR2
red
C2
22nF
50 V
XLR1
black
C8
22nF
50 V
XLR3
white
D3
E E
1N4148
22nF
C12
1.0nF
50 V
1N4148
C15
D4
R14
750k
Ω
Q4
C13
27pF
50 V
~ +6.8 V
C14
220uF-POL
16 V
D5
1N4735A
6.2 V
2SK170
D G S E B C
NOTES: * Values may be different depending on manufacturer
and/or the production run.
2N5087
2N5551
This schematic matches the MCA SP-1 microphone.
F F
6.8pF
2N5551
R7 and R10 could be replaced by a 500k or 1 megohm cermet trimpot
L1
Title:
150uH
L2
62uH
G G
0
1
2
3
4
Generic "China" Condenser Microphone
ZAPNSPARK
Designed by:
Checked by:
Approved by:
J.G. 18:56:03
J.G. 18:56:03
5
6
Document N:
Date:
Sheet of
0001
2008-09-30
1 1
7
Revision:
Size:
A
8
2.8
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