WP-20 PARTS LIST
RESISTORS (All are 1/4 watt, 5%)
330 ohm R20
2.2K R3
4.7K R21, R23, R43
10K R2, R9, R10, R14, R19, R28, R35, R48
20K R12, R27, R32
30K R41
39K R24
47K R15, R33, R49
l00K R4, R5, R8, R11, R13, R16, R17, R18
R25, R26, R29, R34
390K - R7, R22
1 meg - R1, R6, R30, R31
POTENTIOMETERS (All are 200K linear taper)
R36, R37, R38, R39, R40, R42, R44, R45, R46, R47
DISC CAPACITORS
.005uf - C2, C17
.01uf - C6
.02uf - C3, C13, C14, C19
.1uf - C4, C7, C10, C11
.22uf - C12
470pf - Cl5
ELECTROLYTIC CAPACITORS (10 volts or more)
1uf - C5, C8, C20
10uf - C9, C16
47uf - C1
4.7uf - C18
INTEGRATED CIRCUITS
LM3900 Quad Norton Amp - IC2, IC3
CD4001 Quad Nor Gate - IC4
LM555 Timer - IC1
DIODES
1N914 - Dl, D2, D3
TRANSISTORS
2N3904 (NPN) - Q1, Q2, Q3, Q4
NOTE:
Q1 should be selected for the best noise generation.
After selection, cut off collector lead of Q1.
It will not be needed.
SWITCHES
SPST - S1, S2, S4, S5, S9
SPDT - S6, S7, S8, S10, S11, S12, S13, S14, S15
SPST Pushbutton, momemtary, norm. open - S3
JACK
1/4 inch phone jack (mono) - J1
BATTERIES
9V (Alkaline preferred) - Bl, B2
RECOMMENDED ENCLOSURE
LMB Titefit #TF783 (6" X 8" X 3 1/2") (or equiv.)
MISCELLANEOUS
Hardware, Hookup wire, Knobs, 9V battery clips,
IC sockets.
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