God City Instruments – Hannibal V1.3 Build Guide
2
Part
Value
Description
Subsititute
Substitution Notes
C1
22n
film cap
C2
100u
electrolytic cap
47u-220u
power filter cap
C3
47n
film cap
10n-100n
input cap
C4
0.1u MLCC
ceramic cap
C5
0.1u
film cap
47n-330n
forms a HPF with R7 and Low pot
C6
0.1u
film cap
47n-330n
forms a HPF with R11
C7
100u
electrolytic cap
47u-220u
power filter cap
C8
100p
ceramic cap
47p-1n
LPF for first gain stage
C9
100p
ceramic cap
47p-1n
LPF for second gain stage
C10
1uF
film cap
D1
1n4818
Si diode
1n456a, 1n34a, LED, zener, etc
clipping diodes
D2
1n4818
Si diode
1n456a, 1n34a, LED, zener, etc
clipping diodes
D3
1n4818
Si diode
1n456a, 1n34a, LED, zener, etc
clipping diodes
D4
1n5818
Schottky diode
1n5817, 1n4001, bat41, etc
any suitable polarity protection diode for 9v
LED
L1
LED
IC
LM833
OP AMP
TL072, MC1458, RC4558, etc
any pin compatible op amp. Install an IC socket for easy swaps
CLR
4.7k
1/4 watt resistor
1k-10k
current limiting resistor for LED
R1
100k
1/4 watt resistor
R2
10k
1/4 watt resistor
R3
10k
1/4 watt resistor
R4
1M
1/4 watt resistor
2.2M
pull down resistor
R5
1k
1/4 watt resistor
R6
1M
1/4 watt resistor
R7
1k
1/4 watt resistor
100R-10k
forms HPF with C5 and Low pot
R8
1k
1/4 watt resistor
1k-47k
sets minimum gain
R9
22k
1/4 watt resistor
R10
470k
1/4 watt resistor
100k-1M
sets gain of second op amp stage
R11
47k
1/4 watt resistor
10k-100k
sets gain of second op amp stage and forms HPF with C6
R12
1K
1/4 watt resistor
1k--10k
sets maxiumum output volume
VOLUME
A100K
16mm pot
A50k
GAIN
A100K
16mm pot
A50k-A250k
controls gain of first op amp stage
HIGH
A100K
16mm pot
LOW
B10K
16mm pot
S
PAD
send to PCB
L+
PAD
LED+
L-
PAD
LED-
R
PAD
return from
PCB
V
PAD
9V input
G
PAD
ground
