The screen print is missing the signifier for the single opamp on the left, this is a LF351.
The screen print is missing the signifier for the quad opamp on the right, this is a TL084.
Please observe that the TL084 is ‘the other way round’ with respect to the LF351 and 2 x
LM13700.
Please observe the correct polarity of the 2 diodes and 8 electrolytic capacitors. The 6 x
22uF are configured in sets of 2 back to back (negative to negative).
The PCB shows the correct orientation for BC547/BC557. Other transistor types can be used
(eg 2N3904/2N3906), but please observe the correct pinout.
Trimmers: turn both fully anti-clockwise (that’s how I like ‘em), adjust to taste.
Bill of materials
100R x 1
1K5 x x 1
1K8 x 4
10K x 18
15K x 2
27K x 11
100K x 6
150K x 1
270K x 1
1M x 1
4n7 x 1
10n x 4
47n x 1
22uF x 6
47uF x 2
LF351 x 1
LM13700 x 2
TL084 x 1
BC547 x 1
BC557 x 1
1N4148 x 2
A100K x 3
B100K x 3
All pots are 16mm
Alpha.
10K trimmer x 1
100K trimmer x 1
All trimmers are
6mm (Tayda)
SPDT x 1
