Schematic
BOM
R1
1M
R2
1M
R3
1M
R4
10K
R5
4K7
R6
1M
R7
10K
R8
2K2 (CLR)
C1
1u
C2
10n
C3
1n
C4
47n
C5
10p
C6
1u tant
C7
1n
IC
4558
D1,2
1N4148
or 1N60P
GAIN
1MA*
VOL
100KA
*500KC supplied with kit. The gain sweep with the original pot is rubbish.
Use 1N4148 for harder, buzzier sound
Use 1N60P for a softer tone
NOTE: the image on the front page doesn’t have the tantalum cap -
I didn’t have any when I did the test build. It also shows a 4n7 instead of a 47n. Doh!
No wonder it sounded thin at first.
