Sch
BOM
BOM
R1
1M5
R2
150K
R3
150K
R4
12K
R5
390R
R6
10K
R7
10K
R8
470K
R9
10K
R10
470R
R11
4K7
R12
1M5
R13
820R
R14
12K
R15
1M5
R16
150R
R17
2K2
R18
2K2
R19
82K
R20
220K
R21
220K
R22
2K2
R23
22K
R24
3K3
R25
6K8
R26
47K
R27
6K8
R28
47K
R29
47K
R30
1K
R31
1M5
R32
150K
R33
2K2 (CLR)
C1
100n
C2
1u elec
C3
100n
C4
1u elec
C5
1u elec
C6
22u elec
C7
100n
C8
47n
C9
1u elec
C10
1u elec
C11
10n
C12
100n
C13
4n7
C14
4n7
C15
10n
C16
47n
C17
10u elec
D1-5
1N4148
Q1-6
2N3392
Q7
2N5308
POTS
10KB
SW1
3PDT
SW2
SPDT
XFM1
42TM018
It may be possible to substitute other transistors
or transformer. Please don’t ask for advice on this
as we haven’t tested any others, though 2N3391 will
work fine for Q1-6.
Note:
all the transistors have
non-standard pinouts.
