INTERVAL SWITCH # 831 - Parts list - Revised 2/24/01
							Mouser unless noted
VR1 to VR10 -	100 ohm 20 turn trim pot		72-T93YA-100
VR11 & VR12 - 	1K ohm 20 turn trim pot			72-T93YA-1K
R1		2.1 K  1%
R2		150 ohm  1% (+5 position = +10 semitones)	1% metal are
R3		51 ohm  1% (+4 position = +7 semitones)		#  271-value
R4		0 ohm (+ 3 pos = +5 semitones)(position for resistor shorted)
R5		0 ohm (+2 pos = +4 semitones)(position for resistor shorted)
R6		200 ohm  1% (+1 position = +3 semitones)
R7		365 ohm  1% (-1 position = -5 semitones)
R8		68 ohm  1% (-2 position = -7 semitones)
R9		0 ohm (-3 pos = -8 semitones)(position for resistor shorted)
R10		232 ohm  1% (-4 position = -12 semitones)
R11		909 ohm  1% (-5 position = -24 semitones)
R12		953  1%
R13		180 K  5% 
R14		100 K  1% (hand match to same as R15)
R15		100 K  1% (hand match to same as R14)
R16		499K  1% (hand match to ~ 500 ohms greater than R27 & R38)
R17		33 K  1%
R18		10 K  1% (hand match to same as R19)
R19		10 K  1% (hand match to same as R18)
R20		5.1 K  1%
R21		100 K  5%
R22		51 K  1%
R23		470 ohm  5%
R24		180 K  5%
R25		100 K  1% (hand match to same as R26)
R26		100 K  1% (hand match to same as R25)
R27		499 K  1% (within 200 ohms of R38 and ~ 500 ohms less than R16)
R28		33 K  1%
R29		10 K  1% (hand match to same as R30)
R30		10 K  1% (hand match to same as R29)
R31		5.1 K  1%
R32		100 K  5%
R33		51K  1%
R34		470 ohm  5%
R35		180 K  5%
R36		100 K  1% (hand match to same as R37)
R37		100 K  1% (hand match to same as R36)
R38		499 K  1% (withing 200 ohms of R27 and ~ 500 ohms less than R16)
R39		33 K  1%
R40		10 K  1% (hand match to same as R41)
R41		10 K  1% (hand match to same as R40)
R42		5.1 K  1%
R43		100 K  5%
R44		51 K  1%
R45		470 ohm  5%

Resistors R14, R15, R16, R18, R19, R25, R26, R27, R29, R30, R36, R37,
R38, R40 and R41 requiring hand matching were supplied with PCBs.
100K Resistors R16, R27, and R38 originally supplied with the PCB
are no longer needed. They are replaced with 499K as noted in parts
list. 


C1 to C6		1n0  yellow box film		581-1N0J63
C7 & C8			10 uF electrolytic		140-LLRL-35V10
C9 to C18		0.1 uF ceramic			581-SA-105E-104M

SW 1 to SW 3	12 pos 1 pole rotary switch		105-13571
				(adjustage stop)	

Alternate switch (higher price) but	  Electro-switch		Allied #s
Provides the additional clearance	  C6P0112N-A		747-6760
for the top switch that some made	  or C5P0112N-A		747-6747
need for wood cabinet type
construction

U1 to U5		LT1013CP op amp			Newark  06F 9484

J1 to J6		Switchcraft 112A		widely available

Misc:

Knobs		Alco # PKES-90B-1/4			Newark 57F2348

Power connectors:		circuit board header: 	571-6404454
				connector for wire: 	571-6404264
				white cap cover:	571-6405514


custom PCB from me - $15.00