Schematic
BOM
R1
2M2
R2
470K
R3
1K
R4
10K
R5
1K
R6
10K
R7
10K
R8
1K
R9
2K2 (CLR)
C1
470n
C2
100p
C3
100n
C4
3n3
C5
470n
C6
100u elec
C7
47 u elec
D1-3
BAT 41
Q1-2
2N7000**
IC
*
GAIN
500KB
VOICE
10KB
TONE
50KB
VOL
100KA
*Originals have been traced with AD712 and NE5532, both of which are still readily
available. No rules here - find the one you like the best. OPA2604 are good, but you
may like a nice, simple 2262, 4558 or 072.
**Other FETs may work well, but original uses these.
