Epic Polar Boost v1.0
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5
Optimized configuration
ID
Value
Comment
ID
Value Comment
C1
47n
SMF/MKT/Wima
R1
1M
1% metalfilm
C2
10u
Electrolytic 25V+
R2
33k
1% metalfilm
C3
10u
Electrolytic 25V+
R3
1M
1% metalfilm
C4
100u
Electrolytic 25V+
R4
4k7
1% metalfilm
C5
3n3
SMF/MKT/Wima
R5
470R 1% metalfilm
C6
10u
Electrolytic 25V+
R6
22k
1% metalfilm
C7
10u
Electrolytic 25V+
R7
1M
1% metalfilm
C8
100u
Electrolytic 25V+
R8
3k3
1% metalfilm
C9
100n
SMF/MKT/Wima
R9
NC
C10
10u
Electrolytic 25V+
R10
Jump
C11
47u
Electrolytic 25V+
R11
4k7
1% metalfilm
C12
100u
Electrolytic 25V+
R12
390R 1% metalfilm
D1
1N5817
R13
10k
1% metalfilm
D2
1N5817
R14
10k
1% metalfilm
D3
1N5817
R15
100R
IC1
ICL7660S
SW1
DIP2 Gain/Bright
P1
C10k
Boost
SW2
SPDT Voltage
P2
B50k
Tone
VR1
50k
trimpot
P3
B100k
Volume
J1
NC
Q1
2N5457 or J201
J2
NC
Q2
2N5457 or J201
* Optional parts (see modifications section)
All parts need to be 25V+ rated
Jump
means place a jumper in this spot instead of a component
NC
means Not Connected, so leave it empty
Added
Tone
(high cut) control,
Volume
control and transistor bias (Q1) as well as some minor part
optimizations. Read the modifications section for further tone control options.
A=Log, B=Lin, C=Rev. Log