Parts List for the SC-75DW Squelch and CTCSS board:

U1 - 78L09
U2 - 78L05
U3 - FX465DW (SMT - preinstalled)
U4 - TL082 (SMT - preinstalled))
U5 - RC4558 (SMT- preinstalled)
U6 - RC4558 (SMT- preinstalled)

Q1 - 2N2222 
Q2 - 2N2222
Q3 - 2N2222
Q4 - 2N2907
Q5 - 2N2907
Q6 - 2N2907
Q7 - 2N2222
Q8 - 2N2222
Q9 - 2N2222
Q10 - 2N2907
Q11 - 2N2222


(7 - 2N2222, 4 - 2N2907)

D1 - 1N4148
D2 - 1N4148
D3 - 1N4148
D4 - 1N4148
D5 - 1N4148
D6 - 1N4148
D7 - 1N4004
D8 - 1N4148

(1 - 1N4004 & 7 - 1N4148)

LED1 - Blue 3mm
LED2 - Yellow 3mm
LED3 - Green 3mm
LED4 - Red 3mm

All fixed resistors are 1/8 watt

R1 - 4.7k
R2 - 220 ohm
R3 - 2.2k
R4 - 10k
R5 - 10k
R6 - 100 ohm
R7 - 10k
R8 - 10k
R9 - 3.3k
R10 - 5.1k
R11 - 33k
R12 - 220 ohm
R13 - 100k
R14 - 47k
R15 - 3.3k
R16 - 1.5k
R17 - 10k
R18 - 220k
R19 - 220 ohm
R20 - 220 ohm
R21 - 10k
R22 - 6.8k
R23 - 47k
R24 - 47k
R25 - 1k
R26 - 150k
R27 - 3.3k
R28 - 680 ohm
R29 - 150k
R30 - 1k
R31 - 1k
R32 - 10k
R33 - 12k
R34 - 6.8k
R35 - 1k
R36 - 2.7k
R37 - 15k
R38 - 47k
R39 - 820k
R40 - 1.5k
R41 - 1k
R42 - 1k
R43 - 220k
R44 - 1k
R45 - 10k
R46 - 1k
R47 - 100 ohm
R48 - 1k
R49 - 680 ohm
R50 - 1 meg ohm
R51 - 1k
R52 - 10k
R53 - 10k
R54 - 820k
R55 - 560k
R56 - 10k
R57 - 10k
R58 - 1k

VR1 - 10k multi-turn potentiometer (Squelch Pot)

X1 - 4.000 MHz Crystal

S1 - 6 position DIP switch

SJ1-2 - 3 position header (blue or green)  with short (AND squelch function)
SJ3-4 - 3 position header (yellow) with short (PTL function)
SJ5 - 2 position header (white) with short (routes RX disc audio to tone filter input)
SJ6 - 2 position header (red) with short (CAL LED enable jumper)

C1 - 22uF electrolytic
C2 - .1 uF (yellow ceramic marked 104)
C3 - .022uF ceramic marked 223)
C4 - .033uF ceramic marked 333)
C5 - 10uF electrolytic 
C6 - 100pF SM (small)
C7 - 1uF Ceramic (yellow ceramic marked 105)
C8 - 2.2uF electrolytic
C9 - .1 uF (yellow ceramic marked 104)
C10 - 82pF Silver Mica (can be marked "82" or "820")
C11 - .01uF (blue or yellow ceramic marked 103)
C12 - 220pF (yellow ceramic marked 221)
C13 - .001uF  (blue ceramic marked 102)
C14 - 10uF electrolytic 
C15 - .01uF (blue or yellow ceramic marked 103)
C16 - .0022uF (orange ceramic marked 222)
C17 - 220pF (yellow ceramic marked 221)
C18 - 1uF 35V Tantalum (yellow marked 105)
C19 - 1.5uF 35V Tantalum (yellow marked 155)
C20 - 3.3uF electrolytic
C21 - 18 pF Silver Mica
C22 - 33 pF Silver Mica
C23 - .47uF (yellow marked 474)
C24 - 4.7uF electrolytic
C25 - .1 uF (yellow ceramic marked 104)
C26 - .1 uF (yellow ceramic marked 104)
C27 - .47uF (yellow marked 474)
C28 - .22uF (blue marked 224)
C29 - 47pF (small ceramic marked 47)
C30 - .12 uF (brown marked 124)
C31 - .12 uF (brown marked 124)
C32 - .12 uF (brown marked 124)
C33 - 47 pF (small ceramic marked 47)
C34 - 47 pF (small ceramic marked 47)
C35 - .12 uF (brown marked 124)
C36 - .12 uF (brown marked 124)
C37 - .12 uF (brown marked 124)
C38 - .47uF (yellow marked 474)
C39 - 47 pF (small ceramic marked 47)
C40 - .01uF (blue or yellow ceramic marked 103)

DB25 90 degree female chassis connector 
(supplied with optional hardware - install as needed)

Masters Communications SC-75DW Squelch-CTCSS Circuit Board  (current revision)