Schematics
Signal Flow Diagram
Bag
Number
Designator
Type
Value/Model#
Qty.
1
R1
1/2W&Resistor
2K7&Ω
1
2
R2
1/4W&Resistor
383&Ω
1
3
R3
1/4W&Resistor
82&Ω
1
4
R4,&R17,&R18,&R23,&R27,&R34
1/4W&Resistor
20K&Ω
12
5
R5,&R6
1/4W&Resistor
6K8&Ω
4
6
R7,&R8,&R14
1/4W&Resistor
10&Ω
6
7
R9,&R10
1/4W&Resistor
1K2&Ω
4
8
R11,&R12
1/4W&Resistor
150&Ω
4
9
R13,&R26
1/4W&Resistor
33K&Ω
4
10
R15,&R16,&R21,&R22,&R28,&R32*,&R39,&
R40*(R35&Clip)
1/4W&Resistor
2K2&Ω
14
11
R19,&R20
1/4W&Resistor
49E9&Ω
4
12
R24,&R33
1/4W&Resistor
10K&Ω
4
13
R25,&R29
1/4W&Resistor
100K&Ω
4
14
R30,&R31,&R35,&R36,&R37,&R38
1/4W&Resistor
4K99&Ω
12
15
D1&@&D15
Diode
1N4003@T
19
15
Q1,&Q2
Transistor&(TO92@3)
2N4401
4
15
LED1
LED
3mm&LED&@&Blue
2
15
LED2
LED
3mm&LED&@&Red
2
16
IC1,&IC2,&IC3
Dual&OPAMP&IC
NE5532
6
17
IC4
Dual&COMPARATOR&IC
LM393
1
18
C13,&C14
Film&Capacitor&|5LS
10nF,&63V
4
18
C16,&C17
Film&Capacitor&|10LS
1uF,&63V
4
18
C26,&C28
Polar&Tantalum&Cap.&|6.5D,&2.5LS 2.2uF,&35V
4
19
C8,&C20,&C21,&C24,&C25,&C29,&C30
Film&Capacitor&|5LS
100nF,&63V
13
20
C11
Polar&Capacitor&|6.5D,&2.5LS
22uF,&63V
1
21
C3,&C4,&C12,&C15,&C18,&C27
Polar&Capacitor&|8D,&3.5LS
47uF,&100V
9
22
C9,&C10,&C31
Polar&Capacitor&|8D,&3.5LS
100uF,&35V
4
23
C22,&C23
Bi@Polar&Capacitor&|8D,&3.5LS
10uF,&50V
4
24
C1,&C2
Polar&Capacitor&|12.5D,&5LS
1000uF,&35V
2
25
C7
Polar&Capacitor&|10D,&5LS
100uF,&100V
1
26
C19
Polar&Capacitor&|10D,&5LS
3300uF,&6.5V
2
27
VR1
Linear&Voltage&Regulator
Positive&15V,&1A&/&MC7815 1
27
VR2
Linear&Voltage&Regulator
Negative&15V,&1A&/&MC7915 1
27
VR3
Linear&Voltage&Regulator
Pos.&Adj.,&700mA&/&TL783CK 1
27
S1,&S2,&S3,&S4
DPDT&SWITCH
C&K&PN22SJNA03QE
8
27
Colour&Button
Switch&Cap
White
2
27
LPF&&&PAD&Buttons
Switch&Cap
Black
4
27
PHTM
Switch&Cap
Red
2
28
X1
XLR&Female
Neutrik&NC3FAAH
2
28
X2
XLR&Male
Neutrik&NC3MAAH
2
28
K1
Potentiometer&(16mm&knurled)
1K&Ω
2
28
J1
AC&Power&Connector
PJ@017D
1
29
Wire
1&in.&wire
1
29
TA/CM&header
3&pin&header
2
29
TA/CM&Jumper
Colour&module&selector
2&Pin&Jumper
2
29
CM1
8@pin&socket&***Mount&on&Solder&Side&****
2
30
XLR&Screws
Black&self@taping
8
30
Enclosure&Screws
Silver&4@40
4
30
Knob
Knob
HW@KNB@BLK
2
30
Knob&Cap
Knob&Cap
HW@KNBCP@GRY
2
|&D&(Diameter&in&mm.),&LS&(Lead&Spacing&in&mm.)
www.gklaudio.com/gkit@babypre
Copyright&©&2013@2016&@&GKL&Audio.&&All&rights&reserved
Gkit - Baby Pre v4.1 (Dec. 2016)
Bill of Materials
Educational 2Ch. Mic Pre Kit With Clean / Coloured Gain
