EESchema Schematic File Version 4
EELAYER 30 0
EELAYER END
$Descr A3 16535 11693
encoding utf-8
Sheet 1 1
Title "c3lingo interpeter unit"
Date "2020-11-12"
Rev "v0.1"
Comp "Jannik Beyerstedt"
Comment1 "Prototyping Modules"
Comment2 ""
Comment3 ""
Comment4 ""
$EndDescr
$Comp
L Connector:XLR3_Ground J2
U 1 1 5F81A769
P 900 1900
F 0 "J2" H 900 2265 50  0000 C CNN
F 1 "Mic 1" H 900 2174 50  0000 C CNN
F 2 "Connector_PinHeader_2.54mm:PinHeader_1x04_P2.54mm_Vertical" H 900 1900 50  0001 C CNN
F 3 "https://www.neutrik.com/de/produkt/nc3fd-lx.pdf" H 900 1900 50  0001 C CNN
	1    900  1900
	1    0    0    -1  
$EndComp
$Comp
L Connector:XLR3_AudioJack3_Combo_Ground J4
U 2 1 5F81B01C
P 850 8050
F 0 "J4" H 850 8415 50  0000 C CNN
F 1 "Stage Line-In" H 850 8324 50  0000 C CNN
F 2 "Connector_PinHeader_2.54mm:PinHeader_1x04_P2.54mm_Vertical" H 850 8050 50  0001 C CNN
F 3 "https://www.neutrik.com/de/produkt/ncj6fa-h.pdf" H 850 8050 50  0001 C CNN
	2    850  8050
	1    0    0    -1  
$EndComp
$Comp
L Connector:XLR3_Ground J3
U 1 1 5F82013F
P 15300 4900
F 0 "J3" H 15300 5265 50  0000 C CNN
F 1 "Mix Line-Out" H 15300 5174 50  0000 C CNN
F 2 "Connector_PinHeader_2.54mm:PinHeader_1x04_P2.54mm_Vertical" H 15300 4900 50  0001 C CNN
F 3 "https://www.neutrik.com/de/produkt/nc3md-lx.pdf" H 15300 4900 50  0001 C CNN
	1    15300 4900
	-1   0    0    -1  
$EndComp
$Comp
L Connector:AudioJack3_Ground J1
U 1 1 5F821533
P 15200 1800
F 0 "J1" H 14920 1768 50  0000 R CNN
F 1 "Headphone 1" H 14920 1677 50  0000 R CNN
F 2 "Connector_PinHeader_2.54mm:PinHeader_1x04_P2.54mm_Vertical" H 15200 1800 50  0001 C CNN
F 3 "https://www.neutrik.com/de/produkt/nj3fp6c.pdf" H 15200 1800 50  0001 C CNN
	1    15200 1800
	-1   0    0    -1  
$EndComp
$Comp
L power:GNDREF #PWR08
U 1 1 5F830544
P 700 2300
F 0 "#PWR08" H 700 2050 50  0001 C CNN
F 1 "GNDREF" H 705 2127 50  0000 C CNN
F 2 "" H 700 2300 50  0001 C CNN
F 3 "" H 700 2300 50  0001 C CNN
	1    700  2300
	1    0    0    -1  
$EndComp
$Comp
L Device:R R1
U 1 1 5F83A5E0
P 1750 1500
F 0 "R1" V 1543 1500 50  0000 C CNN
F 1 "1K 1%" V 1634 1500 50  0000 C CNN
F 2 "Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal" V 1680 1500 50  0001 C CNN
F 3 "~" H 1750 1500 50  0001 C CNN
	1    1750 1500
	0    1    1    0   
$EndComp
$Comp
L Device:R R6
U 1 1 5F83C638
P 5250 2000
F 0 "R6" V 5043 2000 50  0000 C CNN
F 1 "820R" V 5134 2000 50  0000 C CNN
F 2 "Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal" V 5180 2000 50  0001 C CNN
F 3 "~" H 5250 2000 50  0001 C CNN
	1    5250 2000
	0    1    1    0   
$EndComp
$Comp
L Device:R R11
U 1 1 5F83D91E
P 3200 2500
F 0 "R11" V 2993 2500 50  0000 C CNN
F 1 "330K 1%" V 3084 2500 50  0000 C CNN
F 2 "Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal" V 3130 2500 50  0001 C CNN
F 3 "~" H 3200 2500 50  0001 C CNN
	1    3200 2500
	0    1    1    0   
$EndComp
$Comp
L Device:R R5
U 1 1 5F83F337
P 1950 2000
F 0 "R5" H 2020 2046 50  0000 L CNN
F 1 "27K 1%" H 2020 1955 50  0000 L CNN
F 2 "Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal" V 1880 2000 50  0001 C CNN
F 3 "~" H 1950 2000 50  0001 C CNN
	1    1950 2000
	1    0    0    -1  
$EndComp
$Comp
L power:+15V #PWR01
U 1 1 5F84163B
P 2400 3000
F 0 "#PWR01" H 2400 2850 50  0001 C CNN
F 1 "+15V" H 2415 3173 50  0000 C CNN
F 2 "" H 2400 3000 50  0001 C CNN
F 3 "" H 2400 3000 50  0001 C CNN
	1    2400 3000
	1    0    0    -1  
$EndComp
$Comp
L Device:R R2
U 1 1 5F84960A
P 3200 1500
F 0 "R2" V 2993 1500 50  0000 C CNN
F 1 "330K 1%" V 3084 1500 50  0000 C CNN
F 2 "Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal" V 3130 1500 50  0001 C CNN
F 3 "~" H 3200 1500 50  0001 C CNN
	1    3200 1500
	0    1    1    0   
$EndComp
Wire Wire Line
	3050 2000 3600 2000
Wire Wire Line
	3600 2000 3600 1500
Wire Wire Line
	3600 1500 3350 1500
Wire Wire Line
	3050 1500 2400 1500
Wire Wire Line
	3050 2500 2400 2500
Wire Wire Line
	1950 1850 1950 1800
Wire Wire Line
	1950 1800 2400 1800
Wire Wire Line
	2400 1800 2400 1900
Wire Wire Line
	2400 1900 2450 1900
Wire Wire Line
	2450 2100 2400 2100
Wire Wire Line
	2400 2100 2400 2200
Wire Wire Line
	2400 2200 1950 2200
Wire Wire Line
	1950 2200 1950 2150
Wire Wire Line
	2400 1800 2400 1500
Connection ~ 2400 1800
Connection ~ 2400 1500
Wire Wire Line
	2400 1500 1900 1500
Wire Wire Line
	2400 2200 2400 2500
Connection ~ 2400 2200
Connection ~ 2400 2500
Wire Wire Line
	2400 2500 1900 2500
Wire Wire Line
	3350 2500 3600 2500
Wire Wire Line
	3600 2500 3600 2600
Wire Wire Line
	2650 3000 2800 3000
$Comp
L Device:CP C9
U 1 1 5F8514CB
P 3250 3300
F 0 "C9" V 2995 3300 50  0000 C CNN
F 1 "100uF" V 3086 3300 50  0000 C CNN
F 2 "Capacitor_THT:CP_Radial_D10.0mm_P5.00mm" H 3288 3150 50  0001 C CNN
F 3 "~" H 3250 3300 50  0001 C CNN
	1    3250 3300
	0    -1   1    0   
$EndComp
$Comp
L Device:C C8
U 1 1 5F8504A1
P 2950 3000
F 0 "C8" V 2698 3000 50  0000 C CNN
F 1 "100nF" V 2789 3000 50  0000 C CNN
F 2 "Capacitor_THT:C_Disc_D5.0mm_W2.5mm_P5.00mm" H 2988 2850 50  0001 C CNN
F 3 "~" H 2950 3000 50  0001 C CNN
	1    2950 3000
	0    -1   1    0   
$EndComp
$Comp
L power:GNDREF #PWR012
U 1 1 5F84F240
P 3700 3200
F 0 "#PWR012" H 3700 2950 50  0001 C CNN
F 1 "GNDREF" H 3705 3027 50  0000 C CNN
F 2 "" H 3700 3200 50  0001 C CNN
F 3 "" H 3700 3200 50  0001 C CNN
	1    3700 3200
	1    0    0    -1  
$EndComp
$Comp
L power:GNDREF #PWR09
U 1 1 5F84E5EB
P 3600 2600
F 0 "#PWR09" H 3600 2350 50  0001 C CNN
F 1 "GNDREF" H 3605 2427 50  0000 C CNN
F 2 "" H 3600 2600 50  0001 C CNN
F 3 "" H 3600 2600 50  0001 C CNN
	1    3600 2600
	1    0    0    -1  
$EndComp
$Comp
L power:-15V #PWR011
U 1 1 5F842347
P 2400 800
F 0 "#PWR011" H 2400 900 50  0001 C CNN
F 1 "-15V" H 2415 973 50  0000 C CNN
F 2 "" H 2400 800 50  0001 C CNN
F 3 "" H 2400 800 50  0001 C CNN
	1    2400 800 
	1    0    0    -1  
$EndComp
$Comp
L Device:C C2
U 1 1 5F862FE2
P 2950 1100
F 0 "C2" V 2698 1100 50  0000 C CNN
F 1 "100nF" V 2789 1100 50  0000 C CNN
F 2 "Capacitor_THT:C_Disc_D5.0mm_W2.5mm_P5.00mm" H 2988 950 50  0001 C CNN
F 3 "~" H 2950 1100 50  0001 C CNN
	1    2950 1100
	0    1    1    0   
$EndComp
$Comp
L power:GNDREF #PWR04
U 1 1 5F8640B0
P 3700 1000
F 0 "#PWR04" H 3700 750 50  0001 C CNN
F 1 "GNDREF" H 3705 827 50  0000 C CNN
F 2 "" H 3700 1000 50  0001 C CNN
F 3 "" H 3700 1000 50  0001 C CNN
	1    3700 1000
	1    0    0    -1  
$EndComp
$Comp
L Device:CP C6
U 1 1 5F864500
P 3850 2000
F 0 "C6" V 4105 2000 50  0000 C CNN
F 1 "10uF" V 4014 2000 50  0000 C CNN
F 2 "Capacitor_THT:CP_Radial_D5.0mm_P2.50mm" H 3888 1850 50  0001 C CNN
F 3 "~" H 3850 2000 50  0001 C CNN
	1    3850 2000
	0    -1   -1   0   
$EndComp
$Comp
L Device:R R7
U 1 1 5F86655E
P 4100 2250
F 0 "R7" H 4030 2204 50  0000 R CNN
F 1 "5.6K" H 4030 2295 50  0000 R CNN
F 2 "Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal" V 4030 2250 50  0001 C CNN
F 3 "~" H 4100 2250 50  0001 C CNN
	1    4100 2250
	-1   0    0    1   
$EndComp
Wire Wire Line
	3600 2000 3700 2000
Connection ~ 3600 2000
Wire Wire Line
	4100 2000 4100 2100
Wire Wire Line
	4100 2400 4100 2500
Wire Wire Line
	4100 2500 3600 2500
Connection ~ 3600 2500
Wire Wire Line
	1500 1900 1500 1500
Wire Wire Line
	1500 1500 1600 1500
Wire Wire Line
	2650 2300 2650 3000
Wire Wire Line
	2650 1100 2800 1100
Wire Wire Line
	2650 800  3100 800 
Wire Wire Line
	3400 800  3500 800 
Wire Wire Line
	3500 1100 3100 1100
Wire Wire Line
	2650 3000 2650 3150
Wire Wire Line
	2650 3300 3100 3300
Connection ~ 2650 3000
Wire Wire Line
	3400 3300 3500 3300
Wire Wire Line
	3500 3300 3500 3150
Wire Wire Line
	3100 3000 3500 3000
Wire Wire Line
	2650 3150 2400 3150
Wire Wire Line
	2400 3150 2400 3000
Connection ~ 2650 3150
Wire Wire Line
	2650 3150 2650 3300
Wire Wire Line
	3500 3150 3700 3150
Wire Wire Line
	3700 3150 3700 3200
Connection ~ 3500 3150
Wire Wire Line
	3500 3150 3500 3000
Wire Wire Line
	3500 800  3500 950 
Wire Wire Line
	3500 950  3700 950 
Wire Wire Line
	3700 950  3700 1000
Connection ~ 3500 950 
Wire Wire Line
	3500 950  3500 1100
$Comp
L Device:CP C1
U 1 1 5F863B13
P 3250 800
F 0 "C1" V 3505 800 50  0000 C CNN
F 1 "100uF" V 3414 800 50  0000 C CNN
F 2 "Capacitor_THT:CP_Radial_D10.0mm_P5.00mm" H 3288 650 50  0001 C CNN
F 3 "~" H 3250 800 50  0001 C CNN
	1    3250 800 
	0    1    -1   0   
$EndComp
Text Notes 1500 3000 0    50   ~ 10
Mic Preamp\nGain: 50 dB
$Comp
L power:GNDREF #PWR019
U 1 1 5F8EECF1
P 1400 8550
F 0 "#PWR019" H 1400 8300 50  0001 C CNN
F 1 "GNDREF" H 1405 8377 50  0000 C CNN
F 2 "" H 1400 8550 50  0001 C CNN
F 3 "" H 1400 8550 50  0001 C CNN
	1    1400 8550
	1    0    0    -1  
$EndComp
Wire Wire Line
	1300 8350 1400 8350
Wire Wire Line
	1200 8150 1200 7550
Wire Wire Line
	1200 7550 1900 7550
Wire Wire Line
	1900 7550 1900 8050
Wire Wire Line
	1600 8350 1600 8450
Wire Wire Line
	1600 8450 1100 8450
Wire Wire Line
	1100 8450 1100 8050
Connection ~ 1400 8350
Wire Wire Line
	1400 8350 1500 8350
Wire Wire Line
	15600 4900 15600 5200
Wire Wire Line
	15600 5200 15500 5200
$Comp
L power:GNDREF #PWR015
U 1 1 5F91C92F
P 15500 5200
F 0 "#PWR015" H 15500 4950 50  0001 C CNN
F 1 "GNDREF" H 15505 5027 50  0000 C CNN
F 2 "" H 15500 5200 50  0001 C CNN
F 3 "" H 15500 5200 50  0001 C CNN
	1    15500 5200
	-1   0    0    -1  
$EndComp
Connection ~ 15500 5200
Wire Wire Line
	15500 5200 15400 5200
Wire Wire Line
	15000 1700 14950 1700
Wire Wire Line
	14950 1700 14950 2100
Wire Wire Line
	14950 2100 15200 2100
$Comp
L power:GNDREF #PWR07
U 1 1 5F923283
P 15200 2100
F 0 "#PWR07" H 15200 1850 50  0001 C CNN
F 1 "GNDREF" H 15205 1927 50  0000 C CNN
F 2 "" H 15200 2100 50  0001 C CNN
F 3 "" H 15200 2100 50  0001 C CNN
	1    15200 2100
	1    0    0    -1  
$EndComp
Connection ~ 15200 2100
Text Notes 5000 3100 0    50   ~ 10
Adjustable Input Gain\nGain: -11 to 30 dB\nGain = (220 + R_pot) / 820
$Comp
L Amplifier_Operational:NE5534 U2
U 1 1 5F80D909
P 2750 2000
F 0 "U2" H 3094 2046 50  0000 L CNN
F 1 "NE5534" H 3094 1955 50  0000 L CNN
F 2 "Package_DIP:DIP-8_W7.62mm_Socket_LongPads" H 2800 2050 50  0001 C CNN
F 3 "https://www.ti.com/lit/ds/symlink/ne5534.pdf" H 2800 2150 50  0001 C CNN
	1    2750 2000
	1    0    0    1   
$EndComp
$Comp
L Amplifier_Operational:LM358 U4
U 1 1 5F810C7D
P 4650 9000
F 0 "U4" H 4650 8633 50  0000 C CNN
F 1 "LM833N" H 4650 8724 50  0000 C CNN
F 2 "Package_DIP:DIP-8_W7.62mm_Socket_LongPads" H 4650 9000 50  0001 C CNN
F 3 "https://www.ti.com/lit/ds/symlink/lm833.pdf" H 4650 9000 50  0001 C CNN
	1    4650 9000
	1    0    0    1   
$EndComp
$Comp
L Amplifier_Operational:LM358 U4
U 2 1 5F926E3F
P 8500 9200
F 0 "U4" H 8500 8833 50  0000 C CNN
F 1 "LM833N" H 8500 8924 50  0000 C CNN
F 2 "Package_DIP:DIP-8_W7.62mm_Socket_LongPads" H 8500 9200 50  0001 C CNN
F 3 "https://www.ti.com/lit/ds/symlink/lm833.pdf" H 8500 9200 50  0001 C CNN
	2    8500 9200
	1    0    0    1   
$EndComp
Text Notes 6500 10150 0    50   ~ 10
Input Module\nGain: -6 to +8 dB\nGain = (R_pot + R_22k) / R_47k\nLP_filter(R_pot): 130 - 22 kHz
$Comp
L Device:C C14
U 1 1 5FA035F7
P 7350 8500
F 0 "C14" V 7098 8500 50  0000 C CNN
F 1 "47pF" V 7189 8500 50  0000 C CNN
F 2 "Capacitor_THT:C_Disc_D5.0mm_W2.5mm_P5.00mm" H 7388 8350 50  0001 C CNN
F 3 "~" H 7350 8500 50  0001 C CNN
	1    7350 8500
	0    1    1    0   
$EndComp
$Comp
L Device:R R18
U 1 1 5FA03CB6
P 4000 8750
F 0 "R18" V 3793 8750 50  0000 C CNN
F 1 "10K" V 3884 8750 50  0000 C CNN
F 2 "Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal" V 3930 8750 50  0001 C CNN
F 3 "~" H 4000 8750 50  0001 C CNN
	1    4000 8750
	0    1    1    0   
$EndComp
$Comp
L Device:R R21
U 1 1 5FA17C1B
P 4000 9250
F 0 "R21" V 4115 9250 50  0000 C CNN
F 1 "10K" V 4206 9250 50  0000 C CNN
F 2 "Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal" V 3930 9250 50  0001 C CNN
F 3 "~" H 4000 9250 50  0001 C CNN
	1    4000 9250
	0    1    1    0   
$EndComp
$Comp
L Device:R R17
U 1 1 5FA193EC
P 4700 8450
F 0 "R17" V 4493 8450 50  0000 C CNN
F 1 "10K" V 4584 8450 50  0000 C CNN
F 2 "Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal" V 4630 8450 50  0001 C CNN
F 3 "~" H 4700 8450 50  0001 C CNN
	1    4700 8450
	0    1    1    0   
$EndComp
$Comp
L Device:R R23
U 1 1 5FA1F9D1
P 4250 9450
F 0 "R23" H 4320 9496 50  0000 L CNN
F 1 "10K" H 4320 9405 50  0000 L CNN
F 2 "Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal" V 4180 9450 50  0001 C CNN
F 3 "~" H 4250 9450 50  0001 C CNN
	1    4250 9450
	1    0    0    -1  
$EndComp
$Comp
L power:GNDREF #PWR022
U 1 1 5FA228C1
P 4250 9600
F 0 "#PWR022" H 4250 9350 50  0001 C CNN
F 1 "GNDREF" H 4255 9427 50  0000 C CNN
F 2 "" H 4250 9600 50  0001 C CNN
F 3 "" H 4250 9600 50  0001 C CNN
	1    4250 9600
	1    0    0    -1  
$EndComp
Wire Wire Line
	4150 9250 4250 9250
Wire Wire Line
	4250 9100 4350 9100
Wire Wire Line
	4150 8750 4250 8750
Wire Wire Line
	4250 8900 4350 8900
Wire Wire Line
	4250 8450 4550 8450
Wire Wire Line
	4850 8450 5050 8450
Wire Wire Line
	5050 8450 5050 9000
Wire Wire Line
	5050 9000 4950 9000
Wire Wire Line
	1400 8350 1400 8550
$Comp
L Device:R R10
U 1 1 5F84095A
P 1750 2500
F 0 "R10" V 1543 2500 50  0000 C CNN
F 1 "1K 1%" V 1634 2500 50  0000 C CNN
F 2 "Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal" V 1680 2500 50  0001 C CNN
F 3 "~" H 1750 2500 50  0001 C CNN
	1    1750 2500
	0    1    1    0   
$EndComp
Wire Wire Line
	1500 2500 1600 2500
Wire Wire Line
	900  2200 900  2300
Wire Wire Line
	1500 2300 1500 2500
Text Notes 3000 8200 0    50   ~ 0
TODO: use INA134 **or** own design
$Comp
L Device:R R20
U 1 1 5FAA4C23
P 6750 9000
F 0 "R20" V 6543 9000 50  0000 C CNN
F 1 "47K" V 6634 9000 50  0000 C CNN
F 2 "Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal" V 6680 9000 50  0001 C CNN
F 3 "~" H 6750 9000 50  0001 C CNN
	1    6750 9000
	0    1    1    0   
$EndComp
Wire Wire Line
	1200 1900 1500 1900
Wire Wire Line
	900  2300 1500 2300
$Comp
L Device:R R19
U 1 1 5FAC6B3E
P 7350 8900
F 0 "R19" V 7143 8900 50  0000 C CNN
F 1 "22K" V 7234 8900 50  0000 C CNN
F 2 "Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal" V 7280 8900 50  0001 C CNN
F 3 "~" H 7350 8900 50  0001 C CNN
	1    7350 8900
	0    1    1    0   
$EndComp
$Comp
L Device:R_POT RV1
U 1 1 5FAC97E9
P 7750 8900
F 0 "RV1" V 7635 8900 50  0000 C CNN
F 1 "100K" V 7544 8900 50  0000 C CNN
F 2 "Potentiometer_THT:Potentiometer_Vishay_148-149_Single_Horizontal" H 7750 8900 50  0001 C CNN
F 3 "Bourns Model 91A1A-B28-B20L, 1mm holes/ 2.54 mm pitch, 10mm long, 15mm wide" H 7750 8900 50  0001 C CNN
F 4 "Model 95 has solder lugs" H 7750 8900 50  0001 C CNN "Notes"
	1    7750 8900
	0    -1   -1   0   
$EndComp
Wire Wire Line
	7100 8900 7200 8900
Wire Wire Line
	7100 8900 7100 8500
Wire Wire Line
	7100 8500 7200 8500
Connection ~ 7100 8900
Wire Wire Line
	7750 8750 7750 8650
Wire Wire Line
	7750 8650 7850 8650
Wire Wire Line
	7850 8650 7850 8500
Wire Wire Line
	7850 8500 7500 8500
Wire Wire Line
	7500 8900 7600 8900
$Comp
L power:GNDREF #PWR020
U 1 1 5FAF156D
P 8100 9500
F 0 "#PWR020" H 8100 9250 50  0001 C CNN
F 1 "GNDREF" H 8105 9327 50  0000 C CNN
F 2 "" H 8100 9500 50  0001 C CNN
F 3 "" H 8100 9500 50  0001 C CNN
	1    8100 9500
	1    0    0    -1  
$EndComp
$Comp
L power:GNDREF #PWR021
U 1 1 5FAF1C49
P 9100 9500
F 0 "#PWR021" H 9100 9250 50  0001 C CNN
F 1 "GNDREF" H 9105 9327 50  0000 C CNN
F 2 "" H 9100 9500 50  0001 C CNN
F 3 "" H 9100 9500 50  0001 C CNN
	1    9100 9500
	1    0    0    -1  
$EndComp
$Comp
L Device:R R22
U 1 1 5FAF225E
P 9100 9250
F 0 "R22" H 9170 9296 50  0000 L CNN
F 1 "22K" H 9170 9205 50  0000 L CNN
F 2 "Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal" V 9030 9250 50  0001 C CNN
F 3 "~" H 9100 9250 50  0001 C CNN
	1    9100 9250
	1    0    0    -1  
$EndComp
Wire Wire Line
	8900 8650 8900 9000
Wire Wire Line
	8900 9200 8800 9200
Wire Wire Line
	8200 9300 8100 9300
Wire Wire Line
	8100 9300 8100 9500
Wire Wire Line
	8000 9100 8000 9200
Connection ~ 7850 8650
Wire Wire Line
	7100 8900 7100 9000
Connection ~ 5050 9000
Connection ~ 8900 9000
Wire Wire Line
	8900 9000 8900 9200
Wire Wire Line
	9100 9000 9100 9100
Wire Wire Line
	9100 9400 9100 9500
Text GLabel 9750 9000 2    50   Output ~ 0
Stage
Wire Wire Line
	8900 9000 9100 9000
$Comp
L Amplifier_Operational:LM358 U3
U 1 1 5FCC6AFD
P 2700 5300
F 0 "U3" H 2700 4933 50  0000 C CNN
F 1 "LM833N" H 2700 5024 50  0000 C CNN
F 2 "Package_DIP:DIP-8_W7.62mm_Socket_LongPads" H 2700 5300 50  0001 C CNN
F 3 "https://www.ti.com/lit/ds/symlink/lm833.pdf" H 2700 5300 50  0001 C CNN
	1    2700 5300
	1    0    0    1   
$EndComp
$Comp
L power:GNDREF #PWR026
U 1 1 5F93633D
P 5900 10000
F 0 "#PWR026" H 5900 9750 50  0001 C CNN
F 1 "GNDREF" H 5905 9827 50  0000 C CNN
F 2 "" H 5900 10000 50  0001 C CNN
F 3 "" H 5900 10000 50  0001 C CNN
	1    5900 10000
	1    0    0    -1  
$EndComp
$Comp
L power:GNDREF #PWR025
U 1 1 5F9381DA
P 5100 10000
F 0 "#PWR025" H 5100 9750 50  0001 C CNN
F 1 "GNDREF" H 5105 9827 50  0000 C CNN
F 2 "" H 5100 10000 50  0001 C CNN
F 3 "" H 5100 10000 50  0001 C CNN
	1    5100 10000
	1    0    0    -1  
$EndComp
$Comp
L Device:C C15
U 1 1 5F93A49E
P 5100 9850
F 0 "C15" H 4985 9804 50  0000 R CNN
F 1 "100nF" H 4985 9895 50  0000 R CNN
F 2 "Capacitor_THT:C_Disc_D5.0mm_W2.5mm_P5.00mm" H 5138 9700 50  0001 C CNN
F 3 "~" H 5100 9850 50  0001 C CNN
	1    5100 9850
	-1   0    0    1   
$EndComp
$Comp
L Device:C C16
U 1 1 5F93AE68
P 5900 9850
F 0 "C16" H 5785 9804 50  0000 R CNN
F 1 "100nF" H 5785 9895 50  0000 R CNN
F 2 "Capacitor_THT:C_Disc_D5.0mm_W2.5mm_P5.00mm" H 5938 9700 50  0001 C CNN
F 3 "~" H 5900 9850 50  0001 C CNN
	1    5900 9850
	-1   0    0    1   
$EndComp
Wire Wire Line
	5100 9600 5200 9600
Connection ~ 5100 9600
Wire Wire Line
	5100 9500 5100 9600
Wire Wire Line
	5100 9600 5100 9700
$Comp
L power:+15V #PWR024
U 1 1 5F939835
P 5900 9500
F 0 "#PWR024" H 5900 9350 50  0001 C CNN
F 1 "+15V" H 5915 9673 50  0000 C CNN
F 2 "" H 5900 9500 50  0001 C CNN
F 3 "" H 5900 9500 50  0001 C CNN
	1    5900 9500
	1    0    0    -1  
$EndComp
$Comp
L power:-15V #PWR023
U 1 1 5F938A79
P 5100 9500
F 0 "#PWR023" H 5100 9600 50  0001 C CNN
F 1 "-15V" H 5115 9673 50  0000 C CNN
F 2 "" H 5100 9500 50  0001 C CNN
F 3 "" H 5100 9500 50  0001 C CNN
	1    5100 9500
	1    0    0    -1  
$EndComp
$Comp
L Amplifier_Operational:LM358 U4
U 3 1 5F92849F
P 5500 9700
F 0 "U4" V 5175 9700 50  0000 C CNN
F 1 "LM833N" V 5266 9700 50  0000 C CNN
F 2 "Package_DIP:DIP-8_W7.62mm_Socket_LongPads" H 5500 9700 50  0001 C CNN
F 3 "https://www.ti.com/lit/ds/symlink/lm833.pdf" H 5500 9700 50  0001 C CNN
	3    5500 9700
	0    1    1    0   
$EndComp
$Comp
L power:GNDREF #PWR017
U 1 1 5FCF1258
P 5800 4750
F 0 "#PWR017" H 5800 4500 50  0001 C CNN
F 1 "GNDREF" H 5805 4577 50  0000 C CNN
F 2 "" H 5800 4750 50  0001 C CNN
F 3 "" H 5800 4750 50  0001 C CNN
	1    5800 4750
	1    0    0    -1  
$EndComp
$Comp
L power:GNDREF #PWR016
U 1 1 5FCF125E
P 5000 4750
F 0 "#PWR016" H 5000 4500 50  0001 C CNN
F 1 "GNDREF" H 5005 4577 50  0000 C CNN
F 2 "" H 5000 4750 50  0001 C CNN
F 3 "" H 5000 4750 50  0001 C CNN
	1    5000 4750
	1    0    0    -1  
$EndComp
$Comp
L Device:C C11
U 1 1 5FCF1264
P 5000 4600
F 0 "C11" H 4885 4554 50  0000 R CNN
F 1 "100nF" H 4885 4645 50  0000 R CNN
F 2 "Capacitor_THT:C_Disc_D5.0mm_W2.5mm_P5.00mm" H 5038 4450 50  0001 C CNN
F 3 "~" H 5000 4600 50  0001 C CNN
	1    5000 4600
	-1   0    0    1   
$EndComp
$Comp
L Device:C C12
U 1 1 5FCF126A
P 5800 4600
F 0 "C12" H 5685 4554 50  0000 R CNN
F 1 "100nF" H 5685 4645 50  0000 R CNN
F 2 "Capacitor_THT:C_Disc_D5.0mm_W2.5mm_P5.00mm" H 5838 4450 50  0001 C CNN
F 3 "~" H 5800 4600 50  0001 C CNN
	1    5800 4600
	-1   0    0    1   
$EndComp
Wire Wire Line
	5000 4350 5100 4350
Connection ~ 5000 4350
Wire Wire Line
	5000 4250 5000 4350
Wire Wire Line
	5000 4350 5000 4450
Connection ~ 5800 4350
Wire Wire Line
	5800 4350 5800 4450
Wire Wire Line
	5800 4350 5800 4250
Wire Wire Line
	5700 4350 5800 4350
$Comp
L power:+15V #PWR014
U 1 1 5FCF1278
P 5800 4250
F 0 "#PWR014" H 5800 4100 50  0001 C CNN
F 1 "+15V" H 5815 4423 50  0000 C CNN
F 2 "" H 5800 4250 50  0001 C CNN
F 3 "" H 5800 4250 50  0001 C CNN
	1    5800 4250
	1    0    0    -1  
$EndComp
$Comp
L power:-15V #PWR013
U 1 1 5FCF127E
P 5000 4250
F 0 "#PWR013" H 5000 4350 50  0001 C CNN
F 1 "-15V" H 5015 4423 50  0000 C CNN
F 2 "" H 5000 4250 50  0001 C CNN
F 3 "" H 5000 4250 50  0001 C CNN
	1    5000 4250
	1    0    0    -1  
$EndComp
$Comp
L Amplifier_Operational:LM358 U3
U 3 1 5FCF1284
P 5400 4450
F 0 "U3" V 5075 4450 50  0000 C CNN
F 1 "LM833N" V 5166 4450 50  0000 C CNN
F 2 "Package_DIP:DIP-8_W7.62mm_Socket_LongPads" H 5400 4450 50  0001 C CNN
F 3 "https://www.ti.com/lit/ds/symlink/lm833.pdf" H 5400 4450 50  0001 C CNN
	3    5400 4450
	0    1    1    0   
$EndComp
Text GLabel 8000 2000 2    50   Output ~ 0
Mic1
Text GLabel 1200 4650 0    50   Input ~ 0
Mic1
Text GLabel 9000 850  0    50   Input ~ 0
Stage
$Comp
L Device:R R12
U 1 1 5FD14A6B
P 1750 4650
F 0 "R12" V 1543 4650 50  0000 C CNN
F 1 "22K" V 1634 4650 50  0000 C CNN
F 2 "Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal" V 1680 4650 50  0001 C CNN
F 3 "~" H 1750 4650 50  0001 C CNN
	1    1750 4650
	0    1    1    0   
$EndComp
$Comp
L Device:R R14
U 1 1 5FD2515A
P 1750 5000
F 0 "R14" V 1543 5000 50  0000 C CNN
F 1 "22K" V 1634 5000 50  0000 C CNN
F 2 "Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal" V 1680 5000 50  0001 C CNN
F 3 "~" H 1750 5000 50  0001 C CNN
	1    1750 5000
	0    1    1    0   
$EndComp
$Comp
L Device:R R16
U 1 1 5FD258D7
P 1750 5350
F 0 "R16" V 1543 5350 50  0000 C CNN
F 1 "22K" V 1634 5350 50  0000 C CNN
F 2 "Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal" V 1680 5350 50  0001 C CNN
F 3 "~" H 1750 5350 50  0001 C CNN
	1    1750 5350
	0    1    1    0   
$EndComp
$Comp
L Device:R R13
U 1 1 5FD25F73
P 2850 4800
F 0 "R13" V 2643 4800 50  0000 C CNN
F 1 "22K" V 2734 4800 50  0000 C CNN
F 2 "Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal" V 2780 4800 50  0001 C CNN
F 3 "~" H 2850 4800 50  0001 C CNN
	1    2850 4800
	0    1    1    0   
$EndComp
$Comp
L Device:C C10
U 1 1 5FD269DB
P 2550 4450
F 0 "C10" V 2298 4450 50  0000 C CNN
F 1 "22pF" V 2389 4450 50  0000 C CNN
F 2 "Capacitor_THT:C_Disc_D5.0mm_W2.5mm_P5.00mm" H 2588 4300 50  0001 C CNN
F 3 "~" H 2550 4450 50  0001 C CNN
	1    2550 4450
	0    1    1    0   
$EndComp
$Comp
L Device:C C13
U 1 1 5FD26AFE
P 3350 5300
F 0 "C13" V 3098 5300 50  0000 C CNN
F 1 "4.7pF" V 3189 5300 50  0000 C CNN
F 2 "Capacitor_THT:C_Disc_D5.0mm_W2.5mm_P5.00mm" H 3388 5150 50  0001 C CNN
F 3 "~" H 3350 5300 50  0001 C CNN
	1    3350 5300
	0    1    1    0   
$EndComp
$Comp
L Device:R R15
U 1 1 5FD26ECA
P 3750 5300
F 0 "R15" V 3543 5300 50  0000 C CNN
F 1 "47R" V 3634 5300 50  0000 C CNN
F 2 "Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal" V 3680 5300 50  0001 C CNN
F 3 "~" H 3750 5300 50  0001 C CNN
	1    3750 5300
	0    1    1    0   
$EndComp
Text Notes 1500 5800 0    50   ~ 10
Summing Module\nGain: 0 dB
Wire Wire Line
	1900 4650 2000 4650
Wire Wire Line
	2000 4650 2000 5000
Wire Wire Line
	2000 5000 1900 5000
Wire Wire Line
	2000 5000 2000 5200
Wire Wire Line
	2000 5350 1900 5350
Connection ~ 2000 5000
Wire Wire Line
	2400 5200 2300 5200
Wire Wire Line
	2300 4800 2700 4800
Wire Wire Line
	8000 9100 8200 9100
Wire Wire Line
	7850 8650 8900 8650
$Comp
L power:GNDREF #PWR018
U 1 1 5FD7D2A6
P 2300 5600
F 0 "#PWR018" H 2300 5350 50  0001 C CNN
F 1 "GNDREF" H 2305 5427 50  0000 C CNN
F 2 "" H 2300 5600 50  0001 C CNN
F 3 "" H 2300 5600 50  0001 C CNN
	1    2300 5600
	1    0    0    -1  
$EndComp
Text Notes 13100 5800 0    50   ~ 10
Line driver\nGain: 6 dB
Wire Wire Line
	2300 4800 2300 4450
Wire Wire Line
	2300 4450 2400 4450
Connection ~ 2300 4800
Wire Wire Line
	3000 4800 3100 4800
Wire Wire Line
	3100 4800 3100 4450
Wire Wire Line
	3100 4450 2700 4450
Wire Wire Line
	3100 4800 3100 5300
Wire Wire Line
	3100 5300 3000 5300
Connection ~ 3100 4800
Connection ~ 3100 5300
Wire Wire Line
	3500 5300 3600 5300
Wire Wire Line
	3100 5300 3200 5300
Wire Wire Line
	2400 5400 2300 5400
Wire Wire Line
	2300 5400 2300 5600
Wire Wire Line
	1200 4650 1250 4650
Wire Wire Line
	2000 5200 2300 5200
Connection ~ 2000 5200
Wire Wire Line
	2000 5200 2000 5350
Text GLabel 4350 5000 2    50   Output ~ 0
MicSum
Wire Wire Line
	4350 5000 4300 5000
Wire Wire Line
	4000 5300 3900 5300
$Comp
L power:GNDREF #PWR06
U 1 1 5FFAA880
P 7800 3300
F 0 "#PWR06" H 7800 3050 50  0001 C CNN
F 1 "GNDREF" H 7805 3127 50  0000 C CNN
F 2 "" H 7800 3300 50  0001 C CNN
F 3 "" H 7800 3300 50  0001 C CNN
	1    7800 3300
	1    0    0    -1  
$EndComp
$Comp
L power:GNDREF #PWR05
U 1 1 5FFAA886
P 7000 3300
F 0 "#PWR05" H 7000 3050 50  0001 C CNN
F 1 "GNDREF" H 7005 3127 50  0000 C CNN
F 2 "" H 7000 3300 50  0001 C CNN
F 3 "" H 7000 3300 50  0001 C CNN
	1    7000 3300
	1    0    0    -1  
$EndComp
$Comp
L Device:C C4
U 1 1 5FFAA88C
P 7000 3150
F 0 "C4" H 6885 3104 50  0000 R CNN
F 1 "100nF" H 6885 3195 50  0000 R CNN
F 2 "Capacitor_THT:C_Disc_D5.0mm_W2.5mm_P5.00mm" H 7038 3000 50  0001 C CNN
F 3 "~" H 7000 3150 50  0001 C CNN
	1    7000 3150
	-1   0    0    1   
$EndComp
$Comp
L Device:C C5
U 1 1 5FFAA892
P 7800 3150
F 0 "C5" H 7685 3104 50  0000 R CNN
F 1 "100nF" H 7685 3195 50  0000 R CNN
F 2 "Capacitor_THT:C_Disc_D5.0mm_W2.5mm_P5.00mm" H 7838 3000 50  0001 C CNN
F 3 "~" H 7800 3150 50  0001 C CNN
	1    7800 3150
	-1   0    0    1   
$EndComp
Connection ~ 7800 2900
Wire Wire Line
	7800 2900 7800 3000
Wire Wire Line
	7800 2900 7800 2800
Wire Wire Line
	7700 2900 7800 2900
$Comp
L power:+15V #PWR03
U 1 1 5FFAA8A0
P 7800 2800
F 0 "#PWR03" H 7800 2650 50  0001 C CNN
F 1 "+15V" H 7815 2973 50  0000 C CNN
F 2 "" H 7800 2800 50  0001 C CNN
F 3 "" H 7800 2800 50  0001 C CNN
	1    7800 2800
	1    0    0    -1  
$EndComp
$Comp
L power:-15V #PWR02
U 1 1 5FFAA8A6
P 7000 2800
F 0 "#PWR02" H 7000 2900 50  0001 C CNN
F 1 "-15V" H 7015 2973 50  0000 C CNN
F 2 "" H 7000 2800 50  0001 C CNN
F 3 "" H 7000 2800 50  0001 C CNN
	1    7000 2800
	1    0    0    -1  
$EndComp
$Comp
L Amplifier_Operational:LM358 U1
U 3 1 5FFAA8AC
P 7400 3000
F 0 "U1" V 7075 3000 50  0000 C CNN
F 1 "LM833N" V 7166 3000 50  0000 C CNN
F 2 "Package_DIP:DIP-8_W7.62mm_Socket_LongPads" H 7400 3000 50  0001 C CNN
F 3 "https://www.ti.com/lit/ds/symlink/lm833.pdf" H 7400 3000 50  0001 C CNN
	3    7400 3000
	0    1    1    0   
$EndComp
Text GLabel 9000 1600 0    50   Input ~ 0
Mic1
Text Notes 12800 3000 0    50   ~ 10
Headphone driver\nGain: 26 dB (20)
Text GLabel 11650 5000 0    50   Input ~ 0
MicSum
$Comp
L Amplifier_Operational:LM358 U1
U 2 1 5FFF673D
P 10550 2250
F 0 "U1" H 10550 1883 50  0000 C CNN
F 1 "LM833N" H 10550 1974 50  0000 C CNN
F 2 "Package_DIP:DIP-8_W7.62mm_Socket_LongPads" H 10550 2250 50  0001 C CNN
F 3 "https://www.ti.com/lit/ds/symlink/lm833.pdf" H 10550 2250 50  0001 C CNN
	2    10550 2250
	1    0    0    1   
$EndComp
$Comp
L Device:R R9
U 1 1 5FFF6743
P 10700 1550
F 0 "R9" V 10493 1550 50  0000 C CNN
F 1 "22K" V 10584 1550 50  0000 C CNN
F 2 "Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal" V 10630 1550 50  0001 C CNN
F 3 "~" H 10700 1550 50  0001 C CNN
	1    10700 1550
	0    1    1    0   
$EndComp
$Comp
L Device:R_POT RV13
U 1 1 5FFF6755
P 9550 1100
F 0 "RV13" H 9480 1054 50  0000 R CNN
F 1 "22K" H 9480 1145 50  0000 R CNN
F 2 "Potentiometer_THT:Potentiometer_Vishay_148-149_Single_Horizontal" V 9480 1100 50  0001 C CNN
F 3 "Bourns Model 91A1A-B28-Bxxx, 1mm holes/ 2.54 mm pitch, 10mm long, 15mm wide" H 9550 1100 50  0001 C CNN
F 4 "Model 95 has solder lugs" H 9550 1100 50  0001 C CNN "Notes"
	1    9550 1100
	1    0    0    1   
$EndComp
$Comp
L Device:C C3
U 1 1 5FFF675B
P 10400 1200
F 0 "C3" V 10148 1200 50  0000 C CNN
F 1 "22pF" V 10239 1200 50  0000 C CNN
F 2 "Capacitor_THT:C_Disc_D5.0mm_W2.5mm_P5.00mm" H 10438 1050 50  0001 C CNN
F 3 "~" H 10400 1200 50  0001 C CNN
	1    10400 1200
	0    1    1    0   
$EndComp
$Comp
L Device:C C7
U 1 1 5FFF6761
P 12550 2650
F 0 "C7" V 12298 2650 50  0000 C CNN
F 1 "100nF" V 12389 2650 50  0000 C CNN
F 2 "Capacitor_THT:C_Disc_D5.0mm_W2.5mm_P5.00mm" H 12588 2500 50  0001 C CNN
F 3 "~" H 12550 2650 50  0001 C CNN
	1    12550 2650
	0    1    1    0   
$EndComp
Text Notes 10000 3000 0    50   ~ 10
Summing Module\nGain: -inf to 0 dB
Wire Wire Line
	9700 1850 9800 1850
Wire Wire Line
	10150 1550 10550 1550
$Comp
L power:GNDREF #PWR010
U 1 1 5FFF6777
P 10150 2550
F 0 "#PWR010" H 10150 2300 50  0001 C CNN
F 1 "GNDREF" H 10155 2377 50  0000 C CNN
F 2 "" H 10150 2550 50  0001 C CNN
F 3 "" H 10150 2550 50  0001 C CNN
	1    10150 2550
	1    0    0    -1  
$EndComp
Wire Wire Line
	10150 1550 10150 1200
Wire Wire Line
	10150 1200 10250 1200
Connection ~ 10150 1550
Wire Wire Line
	10250 2350 10150 2350
Wire Wire Line
	10150 2350 10150 2550
Wire Wire Line
	11300 2000 11300 2250
Wire Wire Line
	4000 5000 4000 5300
Wire Wire Line
	10150 2150 10250 2150
$Comp
L Device:R_POT RV14
U 1 1 6016D9DA
P 9550 1850
F 0 "RV14" H 9481 1804 50  0000 R CNN
F 1 "22K" H 9481 1895 50  0000 R CNN
F 2 "Potentiometer_THT:Potentiometer_Vishay_148-149_Single_Horizontal" V 9480 1850 50  0001 C CNN
F 3 "Bourns Model 91A1A-B28-Bxxx, 1mm holes/ 2.54 mm pitch, 10mm long, 15mm wide" H 9550 1850 50  0001 C CNN
F 4 "Model 95 has solder lugs" H 9550 1850 50  0001 C CNN "Notes"
	1    9550 1850
	1    0    0    1   
$EndComp
Wire Wire Line
	9550 1600 9550 1700
Wire Wire Line
	9000 1600 9050 1600
Wire Wire Line
	1050 8150 1200 8150
Wire Wire Line
	1050 7950 1300 7950
Wire Wire Line
	1100 8050 1050 8050
$Comp
L Connector:XLR3_AudioJack3_Combo_Ground J4
U 1 1 5F81E1F3
P 1600 8050
F 0 "J4" H 1582 8367 50  0000 C CNN
F 1 "Stage Line-In" H 1582 8276 50  0000 C CNN
F 2 "Connector_PinHeader_2.54mm:PinHeader_1x04_P2.54mm_Vertical" H 1600 8050 50  0001 C CNN
F 3 "https://www.neutrik.com/de/produkt/ncj6fa-h.pdf" H 1600 8050 50  0001 C CNN
	1    1600 8050
	1    0    0    -1  
$EndComp
Wire Wire Line
	1300 7950 1300 8050
Connection ~ 1300 8050
Wire Wire Line
	1300 8050 1300 8350
$Comp
L Connector:Conn_01x03_Male J5
U 1 1 602993B3
P 15100 9000
F 0 "J5" H 15208 9281 50  0000 C CNN
F 1 "PowerSupply" H 15208 9190 50  0000 C CNN
F 2 "TerminalBlock_MetzConnect:TerminalBlock_MetzConnect_Type073_RT02603HBLU_1x03_P5.08mm_Horizontal" H 15100 9000 50  0001 C CNN
F 3 "" H 15100 9000 50  0001 C CNN
	1    15100 9000
	1    0    0    -1  
$EndComp
$Comp
L power:GNDREF #PWR028
U 1 1 602A0CDE
P 15800 9100
F 0 "#PWR028" H 15800 8850 50  0001 C CNN
F 1 "GNDREF" H 15805 8927 50  0000 C CNN
F 2 "" H 15800 9100 50  0001 C CNN
F 3 "" H 15800 9100 50  0001 C CNN
	1    15800 9100
	1    0    0    -1  
$EndComp
$Comp
L power:+15V #PWR027
U 1 1 602B7044
P 15500 8800
F 0 "#PWR027" H 15500 8650 50  0001 C CNN
F 1 "+15V" H 15515 8973 50  0000 C CNN
F 2 "" H 15500 8800 50  0001 C CNN
F 3 "" H 15500 8800 50  0001 C CNN
	1    15500 8800
	1    0    0    -1  
$EndComp
$Comp
L power:-15V #PWR029
U 1 1 602B7D59
P 15500 9200
F 0 "#PWR029" H 15500 9300 50  0001 C CNN
F 1 "-15V" H 15515 9373 50  0000 C CNN
F 2 "" H 15500 9200 50  0001 C CNN
F 3 "" H 15500 9200 50  0001 C CNN
	1    15500 9200
	-1   0    0    1   
$EndComp
Wire Wire Line
	15300 9100 15500 9100
Wire Wire Line
	15500 9100 15500 9200
Wire Wire Line
	15300 8900 15500 8900
Wire Wire Line
	15500 8900 15500 8800
Wire Wire Line
	15800 9000 15800 9100
NoConn ~ 7900 8900
NoConn ~ 2750 2300
NoConn ~ 2850 2300
NoConn ~ 2750 1700
Wire Wire Line
	15300 9000 15800 9000
Text Notes 10150 750  0    50   ~ 0
TODO: Try 10K or 100K poti\nwith matching feedback R\n(Keep LP filter in mind!)
$Comp
L JBeyerstedt-Library:DRV134PA U5
U 1 1 603FAC5E
P 12800 4700
F 0 "U5" H 13600 5187 60  0000 C CNN
F 1 "DRV134PA" H 13600 5081 60  0000 C CNN
F 2 "Package_DIP:DIP-8_W7.62mm_Socket_LongPads" H 13600 5040 60  0001 C CNN
F 3 "https://www.ti.com/lit/ds/symlink/drv134.pdf" H 13600 5081 60  0001 C CNN
	1    12800 4700
	1    0    0    -1  
$EndComp
$Comp
L power:-15V #PWR0101
U 1 1 6044025E
P 12700 5550
F 0 "#PWR0101" H 12700 5650 50  0001 C CNN
F 1 "-15V" H 12715 5723 50  0000 C CNN
F 2 "" H 12700 5550 50  0001 C CNN
F 3 "" H 12700 5550 50  0001 C CNN
	1    12700 5550
	-1   0    0    1   
$EndComp
$Comp
L power:+15V #PWR0102
U 1 1 60441414
P 12700 4450
F 0 "#PWR0102" H 12700 4300 50  0001 C CNN
F 1 "+15V" H 12715 4623 50  0000 C CNN
F 2 "" H 12700 4450 50  0001 C CNN
F 3 "" H 12700 4450 50  0001 C CNN
	1    12700 4450
	1    0    0    -1  
$EndComp
$Comp
L power:GNDREF #PWR0103
U 1 1 604420CE
P 12200 4650
F 0 "#PWR0103" H 12200 4400 50  0001 C CNN
F 1 "GNDREF" H 12205 4477 50  0000 C CNN
F 2 "" H 12200 4650 50  0001 C CNN
F 3 "" H 12200 4650 50  0001 C CNN
	1    12200 4650
	1    0    0    -1  
$EndComp
$Comp
L power:GNDREF #PWR0104
U 1 1 60442CD0
P 12200 5550
F 0 "#PWR0104" H 12200 5300 50  0001 C CNN
F 1 "GNDREF" H 12205 5377 50  0000 C CNN
F 2 "" H 12200 5550 50  0001 C CNN
F 3 "" H 12200 5550 50  0001 C CNN
	1    12200 5550
	1    0    0    -1  
$EndComp
$Comp
L Device:C C18
U 1 1 60444365
P 12450 5450
F 0 "C18" V 12198 5450 50  0000 C CNN
F 1 "1uF" V 12289 5450 50  0000 C CNN
F 2 "Capacitor_THT:C_Disc_D5.0mm_W2.5mm_P5.00mm" H 12488 5300 50  0001 C CNN
F 3 "~" H 12450 5450 50  0001 C CNN
	1    12450 5450
	0    1    1    0   
$EndComp
$Comp
L Device:C C17
U 1 1 604659B0
P 12450 4550
F 0 "C17" V 12198 4550 50  0000 C CNN
F 1 "1uF" V 12289 4550 50  0000 C CNN
F 2 "Capacitor_THT:C_Disc_D5.0mm_W2.5mm_P5.00mm" H 12488 4400 50  0001 C CNN
F 3 "~" H 12450 4550 50  0001 C CNN
	1    12450 4550
	0    1    1    0   
$EndComp
$Comp
L power:GNDREF #PWR0105
U 1 1 6049ECFC
P 14500 5550
F 0 "#PWR0105" H 14500 5300 50  0001 C CNN
F 1 "GNDREF" H 14505 5377 50  0000 C CNN
F 2 "" H 14500 5550 50  0001 C CNN
F 3 "" H 14500 5550 50  0001 C CNN
	1    14500 5550
	1    0    0    -1  
$EndComp
Wire Wire Line
	14400 5450 14500 5450
Wire Wire Line
	14500 5450 14500 5550
Wire Wire Line
	15300 5300 15300 5200
Wire Wire Line
	14400 4700 14500 4700
Wire Wire Line
	14500 4700 14500 4550
Wire Wire Line
	14500 4550 14400 4550
Wire Wire Line
	14400 5000 14500 5000
Wire Wire Line
	14500 5000 14500 5150
Wire Wire Line
	14500 5150 14400 5150
Wire Wire Line
	14500 4550 14900 4550
Wire Wire Line
	14900 4550 14900 4900
Wire Wire Line
	14900 4900 15000 4900
Connection ~ 14500 4550
Wire Wire Line
	14500 5150 14900 5150
Wire Wire Line
	14900 5150 14900 5300
Wire Wire Line
	14900 5300 15300 5300
Connection ~ 14500 5150
Wire Wire Line
	11650 5000 11700 5000
Wire Wire Line
	12600 5450 12700 5450
Wire Wire Line
	12700 5450 12700 5550
Connection ~ 12700 5450
Wire Wire Line
	12700 5450 12800 5450
Wire Wire Line
	12300 5450 12200 5450
Wire Wire Line
	12200 5450 12200 5550
Wire Wire Line
	12200 4650 12200 4550
Wire Wire Line
	12200 4550 12300 4550
Wire Wire Line
	12600 4550 12700 4550
Connection ~ 12700 4550
Wire Wire Line
	12700 4550 12800 4550
Wire Wire Line
	12700 4450 12700 4550
$Comp
L JBeyerstedt-Library:INA134PA U6
U 1 1 606D5988
P 3100 6950
F 0 "U6" H 3900 7437 60  0000 C CNN
F 1 "INA134PA" H 3900 7331 60  0000 C CNN
F 2 "Package_DIP:DIP-8_W7.62mm_Socket_LongPads" H 3900 7290 60  0001 C CNN
F 3 "https://www.ti.com/lit/ds/symlink/ina134.pdf" H 3100 6750 60  0001 C CNN
	1    3100 6950
	1    0    0    -1  
$EndComp
Wire Wire Line
	4700 7150 4800 7150
Wire Wire Line
	4800 7150 4800 7400
Wire Wire Line
	4800 7400 4700 7400
$Comp
L power:-15V #PWR0106
U 1 1 606E64F7
P 4800 7800
F 0 "#PWR0106" H 4800 7900 50  0001 C CNN
F 1 "-15V" H 4815 7973 50  0000 C CNN
F 2 "" H 4800 7800 50  0001 C CNN
F 3 "" H 4800 7800 50  0001 C CNN
	1    4800 7800
	1    0    0    1   
$EndComp
$Comp
L power:+15V #PWR0107
U 1 1 606E64FD
P 4800 6700
F 0 "#PWR0107" H 4800 6550 50  0001 C CNN
F 1 "+15V" H 4815 6873 50  0000 C CNN
F 2 "" H 4800 6700 50  0001 C CNN
F 3 "" H 4800 6700 50  0001 C CNN
	1    4800 6700
	-1   0    0    -1  
$EndComp
$Comp
L power:GNDREF #PWR0108
U 1 1 606E6503
P 5300 6900
F 0 "#PWR0108" H 5300 6650 50  0001 C CNN
F 1 "GNDREF" H 5305 6727 50  0000 C CNN
F 2 "" H 5300 6900 50  0001 C CNN
F 3 "" H 5300 6900 50  0001 C CNN
	1    5300 6900
	-1   0    0    -1  
$EndComp
$Comp
L Device:C C20
U 1 1 606E650F
P 5050 7700
F 0 "C20" V 4798 7700 50  0000 C CNN
F 1 "1uF" V 4889 7700 50  0000 C CNN
F 2 "Capacitor_THT:C_Disc_D5.0mm_W2.5mm_P5.00mm" H 5088 7550 50  0001 C CNN
F 3 "~" H 5050 7700 50  0001 C CNN
	1    5050 7700
	0    -1   1    0   
$EndComp
$Comp
L Device:C C19
U 1 1 606E6515
P 5050 6800
F 0 "C19" V 4798 6800 50  0000 C CNN
F 1 "1uF" V 4889 6800 50  0000 C CNN
F 2 "Capacitor_THT:C_Disc_D5.0mm_W2.5mm_P5.00mm" H 5088 6650 50  0001 C CNN
F 3 "~" H 5050 6800 50  0001 C CNN
	1    5050 6800
	0    -1   1    0   
$EndComp
Wire Wire Line
	4900 7700 4800 7700
Wire Wire Line
	4800 7700 4800 7800
Connection ~ 4800 7700
Wire Wire Line
	4800 7700 4700 7700
Wire Wire Line
	5200 7700 5300 7700
Wire Wire Line
	5300 7700 5300 7800
Wire Wire Line
	5300 6900 5300 6800
Wire Wire Line
	5300 6800 5200 6800
Wire Wire Line
	4900 6800 4800 6800
Connection ~ 4800 6800
Wire Wire Line
	4800 6800 4700 6800
Wire Wire Line
	4800 6700 4800 6800
Connection ~ 4800 7400
$Comp
L power:GNDREF #PWR0109
U 1 1 606E6509
P 5300 7800
F 0 "#PWR0109" H 5300 7550 50  0001 C CNN
F 1 "GNDREF" H 5305 7627 50  0000 C CNN
F 2 "" H 5300 7800 50  0001 C CNN
F 3 "" H 5300 7800 50  0001 C CNN
	1    5300 7800
	-1   0    0    -1  
$EndComp
$Comp
L power:GNDREF #PWR0110
U 1 1 6073643F
P 3000 7800
F 0 "#PWR0110" H 3000 7550 50  0001 C CNN
F 1 "GNDREF" H 3005 7627 50  0000 C CNN
F 2 "" H 3000 7800 50  0001 C CNN
F 3 "" H 3000 7800 50  0001 C CNN
	1    3000 7800
	-1   0    0    -1  
$EndComp
Wire Wire Line
	3100 7700 3000 7700
Wire Wire Line
	3000 7700 3000 7800
$Comp
L power:GNDREF #PWR035
U 1 1 609E4DD0
P 14100 2700
F 0 "#PWR035" H 14100 2450 50  0001 C CNN
F 1 "GNDREF" H 14105 2527 50  0000 C CNN
F 2 "" H 14100 2700 50  0001 C CNN
F 3 "" H 14100 2700 50  0001 C CNN
	1    14100 2700
	1    0    0    -1  
$EndComp
Wire Wire Line
	14600 2000 14600 1900
Wire Wire Line
	14600 1800 15000 1800
Wire Wire Line
	15000 1900 14600 1900
Connection ~ 14600 1900
Wire Wire Line
	14600 1800 14600 1900
$Comp
L Amplifier_Operational:LM358 U1
U 1 1 60A8F329
P 5900 2250
F 0 "U1" H 5900 1883 50  0000 C CNN
F 1 "LM833N" H 5900 1974 50  0000 C CNN
F 2 "Package_DIP:DIP-8_W7.62mm_Socket_LongPads" H 5900 2250 50  0001 C CNN
F 3 "https://www.ti.com/lit/ds/symlink/lm833.pdf" H 5900 2250 50  0001 C CNN
	1    5900 2250
	1    0    0    1   
$EndComp
$Comp
L power:GNDREF #PWR0111
U 1 1 60BBC462
P 5500 2550
F 0 "#PWR0111" H 5500 2300 50  0001 C CNN
F 1 "GNDREF" H 5505 2377 50  0000 C CNN
F 2 "" H 5500 2550 50  0001 C CNN
F 3 "" H 5500 2550 50  0001 C CNN
	1    5500 2550
	1    0    0    -1  
$EndComp
Wire Wire Line
	5500 2150 5600 2150
Wire Wire Line
	5600 2350 5500 2350
Wire Wire Line
	5500 2350 5500 2550
Wire Wire Line
	5500 2000 5500 2150
$Comp
L Switch:SW_SPST_LED SW2
U 1 1 60D16A9A
P 7000 1050
F 0 "SW2" H 7000 1385 50  0000 C CNN
F 1 "OnAir_1" H 7000 1294 50  0000 C CNN
F 2 "Connector_PinHeader_2.54mm:PinHeader_1x04_P2.54mm_Vertical" H 7000 1350 50  0001 C CNN
F 3 "https://sten-eswitch-13110800-production.s3.amazonaws.com/system/asset/product_line/data_sheet/38/LP11.pdf" H 7000 1350 50  0001 C CNN
	1    7000 1050
	1    0    0    -1  
$EndComp
Connection ~ 5500 2000
Wire Wire Line
	6400 2250 6200 2250
NoConn ~ 6300 1550
$Comp
L Switch:SW_Push SW1
U 1 1 60D151FD
P 5950 750
F 0 "SW1" H 5950 965 50  0000 C CNN
F 1 "Mute_1" H 5950 874 50  0000 C CNN
F 2 "Connector_PinHeader_2.54mm:PinHeader_1x02_P2.54mm_Vertical" H 5950 950 50  0001 C CNN
F 3 "~" H 5950 950 50  0001 C CNN
	1    5950 750 
	1    0    0    -1  
$EndComp
Wire Wire Line
	5500 1550 5500 2000
Wire Wire Line
	6150 1150 6150 1300
Wire Wire Line
	5900 1150 6150 1150
Wire Wire Line
	5900 1550 6000 1550
Connection ~ 5500 1550
Wire Wire Line
	5500 1150 5500 1550
Wire Wire Line
	5500 1150 5600 1150
Wire Wire Line
	5600 1550 5500 1550
$Comp
L Device:R_POT RV11
U 1 1 60B0D55A
P 6150 1550
F 0 "RV11" V 6035 1550 50  0000 C CNN
F 1 "25K" V 5944 1550 50  0000 C CNN
F 2 "Potentiometer_THT:Potentiometer_Vishay_148-149_Single_Horizontal" V 6080 1550 50  0001 C CNN
F 3 "Bourns Model 91A1A-B28-Bxxx, 1mm holes/ 2.54 mm pitch, 10mm long, 15mm wide" H 6150 1550 50  0001 C CNN
F 4 "Model 95 has solder lugs" H 6150 1550 50  0001 C CNN "Notes"
	1    6150 1550
	0    -1   -1   0   
$EndComp
$Comp
L Device:R R26
U 1 1 60AAAB08
P 5750 1550
F 0 "R26" V 5543 1550 50  0000 C CNN
F 1 "220R" V 5634 1550 50  0000 C CNN
F 2 "Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal" V 5680 1550 50  0001 C CNN
F 3 "~" H 5750 1550 50  0001 C CNN
	1    5750 1550
	0    1    1    0   
$EndComp
$Comp
L Device:C C25
U 1 1 60AA92C3
P 5750 1150
F 0 "C25" V 5498 1150 50  0000 C CNN
F 1 "0.1uF" V 5589 1150 50  0000 C CNN
F 2 "Capacitor_THT:C_Disc_D5.0mm_W2.5mm_P5.00mm" H 5788 1000 50  0001 C CNN
F 3 "~" H 5750 1150 50  0001 C CNN
	1    5750 1150
	0    1    1    0   
$EndComp
Text Notes 6600 1450 0    50   ~ 0
TODO: On-Air button LEDs\n(actually one rd, one gn,\nwith common anode)
$Comp
L power:GNDREF #PWR036
U 1 1 5FF79FFE
P 9550 2000
F 0 "#PWR036" H 9550 1750 50  0001 C CNN
F 1 "GNDREF" H 9555 1827 50  0000 C CNN
F 2 "" H 9550 2000 50  0001 C CNN
F 3 "" H 9550 2000 50  0001 C CNN
	1    9550 2000
	1    0    0    -1  
$EndComp
Wire Wire Line
	6400 750  6150 750 
Wire Wire Line
	5750 750  5500 750 
Wire Wire Line
	5500 750  5500 1150
Connection ~ 5500 1150
Wire Wire Line
	6400 750  6400 1300
Wire Wire Line
	6150 1300 6400 1300
Connection ~ 6150 1300
Wire Wire Line
	6150 1300 6150 1400
Connection ~ 6400 1300
Wire Wire Line
	6400 1300 6400 2250
$Comp
L Jumper:Jumper_3_Bridged12 JP2
U 1 1 5FBA61BC
P 2250 8450
F 0 "JP2" V 2296 8516 50  0000 L CNN
F 1 "Stage Cold" V 2205 8516 50  0000 L CNN
F 2 "Connector_PinHeader_2.54mm:PinHeader_1x03_P2.54mm_Vertical" H 2250 8450 50  0001 C CNN
F 3 "~" H 2250 8450 50  0001 C CNN
	1    2250 8450
	0    1    -1   0   
$EndComp
$Comp
L Jumper:Jumper_3_Bridged12 JP1
U 1 1 5FBCEF0F
P 2250 7750
F 0 "JP1" V 2296 7816 50  0000 L CNN
F 1 "Stage Hot" V 2205 7816 50  0000 L CNN
F 2 "Connector_PinHeader_2.54mm:PinHeader_1x03_P2.54mm_Vertical" H 2250 7750 50  0001 C CNN
F 3 "~" H 2250 7750 50  0001 C CNN
	1    2250 7750
	0    1    -1   0   
$EndComp
$Comp
L Jumper:Jumper_3_Bridged12 JP3
U 1 1 5FBCF5A3
P 6000 8600
F 0 "JP3" V 6046 8667 50  0000 L CNN
F 1 "Stage Out" V 5955 8667 50  0000 L CNN
F 2 "Connector_PinHeader_2.54mm:PinHeader_1x03_P2.54mm_Vertical" H 6000 8600 50  0001 C CNN
F 3 "~" H 6000 8600 50  0001 C CNN
	1    6000 8600
	0    -1   -1   0   
$EndComp
Connection ~ 1900 8050
Wire Wire Line
	2100 7750 2000 7750
Wire Wire Line
	2000 7750 2000 8050
Wire Wire Line
	2000 8050 1900 8050
Wire Wire Line
	1600 8450 2100 8450
Connection ~ 1600 8450
Wire Wire Line
	2250 7500 2250 7150
Wire Wire Line
	2250 7150 3100 7150
Wire Wire Line
	2250 8000 2800 8000
Wire Wire Line
	2800 8000 2800 8750
Wire Wire Line
	2250 8200 2700 8200
Wire Wire Line
	2700 8200 2700 7400
Wire Wire Line
	2700 7400 3100 7400
Wire Wire Line
	4800 7400 6000 7400
Wire Wire Line
	6000 7400 6000 8350
Wire Wire Line
	6000 9000 6000 8850
NoConn ~ 2850 1700
Wire Wire Line
	7000 2800 7000 2900
Wire Wire Line
	7100 2900 7000 2900
Connection ~ 7000 2900
Wire Wire Line
	7000 2900 7000 3000
Wire Wire Line
	5800 9600 5900 9600
Wire Wire Line
	5900 9600 5900 9500
Wire Wire Line
	5900 9600 5900 9700
Connection ~ 5900 9600
Wire Wire Line
	2650 1700 2650 1100
Connection ~ 2650 1100
Wire Wire Line
	2650 800  2650 950 
Wire Wire Line
	2400 800  2400 950 
Wire Wire Line
	2400 950  2650 950 
Connection ~ 2650 950 
Wire Wire Line
	2650 950  2650 1100
Wire Wire Line
	600  2250 700  2250
Wire Wire Line
	700  2250 700  2300
Wire Wire Line
	800  2200 800  2250
Wire Wire Line
	800  2250 700  2250
Connection ~ 700  2250
Wire Wire Line
	600  2250 600  1900
Text Notes 3750 1650 0    50   ~ 0
HP Filter?\nTODO: Try 120R\nfor ca. 150 Hz\n\nf_c = 1/(2*PI*R*C)
Wire Wire Line
	5400 2000 5500 2000
$Comp
L Device:C C26
U 1 1 5FB69AC8
P 14100 2250
F 0 "C26" H 14215 2296 50  0000 L CNN
F 1 "47nF" H 14215 2205 50  0000 L CNN
F 2 "Capacitor_THT:C_Disc_D5.0mm_W2.5mm_P5.00mm" H 14138 2100 50  0001 C CNN
F 3 "~" H 14100 2250 50  0001 C CNN
	1    14100 2250
	1    0    0    -1  
$EndComp
$Comp
L Device:CP C24
U 1 1 5FB6C2ED
P 14350 2000
F 0 "C24" V 14605 2000 50  0000 C CNN
F 1 "220uF" V 14514 2000 50  0000 C CNN
F 2 "Capacitor_THT:CP_Radial_D10.0mm_P5.00mm" H 14388 1850 50  0001 C CNN
F 3 "~" H 14350 2000 50  0001 C CNN
	1    14350 2000
	0    -1   -1   0   
$EndComp
$Comp
L Device:R R25
U 1 1 5FB6DC67
P 14100 2550
F 0 "R25" H 14170 2596 50  0000 L CNN
F 1 "12R" H 14170 2505 50  0000 L CNN
F 2 "Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal" V 14030 2550 50  0001 C CNN
F 3 "~" H 14100 2550 50  0001 C CNN
	1    14100 2550
	1    0    0    -1  
$EndComp
$Comp
L power:+15V #PWR0112
U 1 1 5FB9C332
P 13200 700
F 0 "#PWR0112" H 13200 550 50  0001 C CNN
F 1 "+15V" H 13215 873 50  0000 C CNN
F 2 "" H 13200 700 50  0001 C CNN
F 3 "" H 13200 700 50  0001 C CNN
	1    13200 700 
	1    0    0    -1  
$EndComp
$Comp
L power:GNDREF #PWR0113
U 1 1 5FB9DA2E
P 13200 2500
F 0 "#PWR0113" H 13200 2250 50  0001 C CNN
F 1 "GNDREF" H 13205 2327 50  0000 C CNN
F 2 "" H 13200 2500 50  0001 C CNN
F 3 "" H 13200 2500 50  0001 C CNN
	1    13200 2500
	1    0    0    -1  
$EndComp
$Comp
L Device:R_POT RV19
U 1 1 5FBA2B4E
P 12150 2650
F 0 "RV19" H 12081 2604 50  0000 R CNN
F 1 "25K" H 12081 2695 50  0000 R CNN
F 2 "Potentiometer_THT:Potentiometer_Vishay_148-149_Single_Horizontal" H 12150 2650 50  0001 C CNN
F 3 "Bourns Model 91A1A-B28-Bxxx, 1mm holes/ 2.54 mm pitch, 10mm long, 15mm wide" H 12150 2650 50  0001 C CNN
F 4 "Model 95 has solder lugs" H 12150 2650 50  0001 C CNN "Notes"
	1    12150 2650
	1    0    0    1   
$EndComp
Wire Wire Line
	12150 2400 12150 2500
$Comp
L power:GNDREF #PWR0114
U 1 1 5FBBA57F
P 12150 2900
F 0 "#PWR0114" H 12150 2650 50  0001 C CNN
F 1 "GNDREF" H 12155 2727 50  0000 C CNN
F 2 "" H 12150 2900 50  0001 C CNN
F 3 "" H 12150 2900 50  0001 C CNN
	1    12150 2900
	1    0    0    -1  
$EndComp
Wire Wire Line
	12150 2800 12150 2900
Wire Wire Line
	13200 2300 13200 2400
Wire Wire Line
	13000 1900 12800 1900
Wire Wire Line
	13000 2100 13000 2400
Wire Wire Line
	13000 2400 13200 2400
Connection ~ 13200 2400
Wire Wire Line
	13200 2400 13200 2500
Wire Wire Line
	14200 2000 14100 2000
Wire Wire Line
	14100 2000 14100 2100
Wire Wire Line
	14500 2000 14600 2000
Wire Wire Line
	14100 2000 13600 2000
Connection ~ 14100 2000
$Comp
L Device:CP C23
U 1 1 5FD130B1
P 13450 1550
F 0 "C23" V 13705 1550 50  0000 C CNN
F 1 "100uF" V 13614 1550 50  0000 C CNN
F 2 "Capacitor_THT:CP_Radial_D10.0mm_P5.00mm" H 13488 1400 50  0001 C CNN
F 3 "~" H 13450 1550 50  0001 C CNN
	1    13450 1550
	0    -1   -1   0   
$EndComp
Wire Wire Line
	8000 2000 7950 2000
Wire Wire Line
	7700 2000 7700 2250
Connection ~ 6400 2250
$Comp
L Device:R R24
U 1 1 5FE4A41D
P 12150 2250
F 0 "R24" H 12080 2296 50  0000 R CNN
F 1 "820K" H 12080 2205 50  0000 R CNN
F 2 "Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal" V 12080 2250 50  0001 C CNN
F 3 "~" H 12150 2250 50  0001 C CNN
	1    12150 2250
	-1   0    0    -1  
$EndComp
Wire Wire Line
	12150 2000 12150 2100
$Comp
L Device:C C22
U 1 1 5FF934F9
P 13450 1100
F 0 "C22" V 13198 1100 50  0000 C CNN
F 1 "100nF" V 13289 1100 50  0000 C CNN
F 2 "Capacitor_THT:C_Disc_D5.0mm_W2.5mm_P5.00mm" H 13488 950 50  0001 C CNN
F 3 "~" H 13450 1100 50  0001 C CNN
	1    13450 1100
	0    1    1    0   
$EndComp
$Comp
L Device:CP C21
U 1 1 60184128
P 13750 800
F 0 "C21" V 13495 800 50  0000 C CNN
F 1 "100uF" V 13586 800 50  0000 C CNN
F 2 "Capacitor_THT:CP_Radial_D10.0mm_P5.00mm" H 13788 650 50  0001 C CNN
F 3 "~" H 13750 800 50  0001 C CNN
	1    13750 800 
	0    -1   1    0   
$EndComp
Wire Wire Line
	13200 700  13200 800 
Wire Wire Line
	13200 800  13600 800 
Wire Wire Line
	13200 800  13200 1100
Wire Wire Line
	13200 1100 13300 1100
Connection ~ 13200 800 
Connection ~ 13200 1100
Wire Wire Line
	13600 1100 14000 1100
Wire Wire Line
	14000 1100 14000 950 
Wire Wire Line
	14000 800  13900 800 
$Comp
L power:GNDREF #PWR0115
U 1 1 60200022
P 14200 1000
F 0 "#PWR0115" H 14200 750 50  0001 C CNN
F 1 "GNDREF" H 14205 827 50  0000 C CNN
F 2 "" H 14200 1000 50  0001 C CNN
F 3 "" H 14200 1000 50  0001 C CNN
	1    14200 1000
	1    0    0    -1  
$EndComp
Wire Wire Line
	14200 950  14200 1000
Wire Wire Line
	14000 950  14200 950 
Connection ~ 14000 950 
Wire Wire Line
	14000 950  14000 800 
Wire Wire Line
	13200 1100 13200 1700
$Comp
L power:GNDREF #PWR0116
U 1 1 5FCF788F
P 13600 1600
F 0 "#PWR0116" H 13600 1350 50  0001 C CNN
F 1 "GNDREF" H 13605 1427 50  0000 C CNN
F 2 "" H 13600 1600 50  0001 C CNN
F 3 "" H 13600 1600 50  0001 C CNN
	1    13600 1600
	1    0    0    -1  
$EndComp
$Comp
L Amplifier_Audio:LM386 U7
U 1 1 5FB67AE3
P 13300 2000
F 0 "U7" H 13644 2046 50  0000 L CNN
F 1 "LM386N-4" H 13644 1955 50  0000 L CNN
F 2 "Package_DIP:DIP-8_W7.62mm_Socket_LongPads" H 13400 2100 50  0001 C CNN
F 3 "https://www.ti.com/lit/ds/symlink/lm386.pdf" H 13500 2200 50  0001 C CNN
	1    13300 2000
	1    0    0    -1  
$EndComp
Wire Wire Line
	13600 1550 13600 1600
Wire Wire Line
	13300 1550 13300 1700
$Comp
L power:PWR_FLAG #FLG0101
U 1 1 602E81BB
P 14700 8900
F 0 "#FLG0101" H 14700 8975 50  0001 C CNN
F 1 "PWR_FLAG" H 14700 9073 50  0000 C CNN
F 2 "" H 14700 8900 50  0001 C CNN
F 3 "~" H 14700 8900 50  0001 C CNN
	1    14700 8900
	1    0    0    -1  
$EndComp
$Comp
L power:PWR_FLAG #FLG0102
U 1 1 602E98DE
P 14700 9000
F 0 "#FLG0102" H 14700 9075 50  0001 C CNN
F 1 "PWR_FLAG" V 14700 9127 50  0000 L CNN
F 2 "" H 14700 9000 50  0001 C CNN
F 3 "~" H 14700 9000 50  0001 C CNN
	1    14700 9000
	0    -1   -1   0   
$EndComp
$Comp
L power:PWR_FLAG #FLG0103
U 1 1 602EA47B
P 14700 9100
F 0 "#FLG0103" H 14700 9175 50  0001 C CNN
F 1 "PWR_FLAG" H 14700 9273 50  0000 C CNN
F 2 "" H 14700 9100 50  0001 C CNN
F 3 "~" H 14700 9100 50  0001 C CNN
	1    14700 9100
	-1   0    0    1   
$EndComp
Wire Wire Line
	14700 8900 15300 8900
Connection ~ 15300 8900
Wire Wire Line
	14700 9000 15300 9000
Connection ~ 15300 9000
Wire Wire Line
	14700 9100 15300 9100
Connection ~ 15300 9100
NoConn ~ 13300 2300
NoConn ~ 13400 2300
Wire Wire Line
	10850 2250 10950 2250
Wire Wire Line
	10550 1200 10950 1200
Wire Wire Line
	10950 1200 10950 1550
Connection ~ 10950 2250
Wire Wire Line
	10850 1550 10950 1550
Connection ~ 10950 1550
$Comp
L power:GNDREF #PWR0117
U 1 1 5FCA62EC
P 9550 1250
F 0 "#PWR0117" H 9550 1000 50  0001 C CNN
F 1 "GNDREF" H 9555 1077 50  0000 C CNN
F 2 "" H 9550 1250 50  0001 C CNN
F 3 "" H 9550 1250 50  0001 C CNN
	1    9550 1250
	1    0    0    -1  
$EndComp
Wire Wire Line
	9550 850  9550 950 
Wire Wire Line
	9000 850  9050 850 
Wire Wire Line
	9700 1100 9800 1100
$Comp
L power:GNDREF #PWR0118
U 1 1 5FD303BF
P 9900 3300
F 0 "#PWR0118" H 9900 3050 50  0001 C CNN
F 1 "GNDREF" H 9905 3127 50  0000 C CNN
F 2 "" H 9900 3300 50  0001 C CNN
F 3 "" H 9900 3300 50  0001 C CNN
	1    9900 3300
	1    0    0    -1  
$EndComp
$Comp
L Device:R_POT_Dual RV15
U 1 1 5FD69197
P 9650 2850
F 0 "RV15" V 9696 2662 50  0000 R CNN
F 1 "22K" V 9605 2662 50  0000 R CNN
F 2 "Connector_PinHeader_2.54mm:PinHeader_2x03_P2.54mm_Vertical" H 9900 2775 50  0001 C CNN
F 3 "Need Bourns 91 or 95 x2x-xyy-Bzz" H 9900 2775 50  0001 C CNN
F 4 "Model 95 has solder lugs" H 9650 2850 50  0001 C CNN "Notes"
	1    9650 2850
	0    1    -1   0   
$EndComp
Wire Wire Line
	9550 2850 9550 2950
Wire Wire Line
	9550 2350 9550 2450
Wire Wire Line
	9800 2600 9750 2600
Wire Wire Line
	9800 3100 9750 3100
Connection ~ 9800 1850
Connection ~ 9800 2600
Wire Wire Line
	9800 1850 9800 2150
Wire Wire Line
	9800 2600 9800 3100
Wire Wire Line
	9800 1100 9800 1850
Wire Wire Line
	9550 2750 9900 2750
Wire Wire Line
	9900 2750 9900 3250
Wire Wire Line
	9900 3250 9900 3300
Connection ~ 9900 3250
Wire Wire Line
	9550 3250 9900 3250
Text Notes 8800 2350 0    50   ~ 0
Mic2
Text Notes 8800 2850 0    50   ~ 0
Mic3
$Comp
L Connector:TestPoint TP1
U 1 1 5FAE2168
P 7950 2000
F 0 "TP1" H 7950 2325 50  0000 C CNN
F 1 "Mic1" H 7950 2234 50  0000 C CNN
F 2 "TestPoint:TestPoint_THTPad_D2.0mm_Drill1.0mm" H 8150 2000 50  0001 C CNN
F 3 "~" H 8150 2000 50  0001 C CNN
	1    7950 2000
	1    0    0    -1  
$EndComp
Wire Wire Line
	6400 2250 7700 2250
$Comp
L Connector:Conn_01x03_Male J6
U 1 1 5FB363A9
P 13100 9000
F 0 "J6" H 13208 9281 50  0000 C CNN
F 1 "PowerSupply" H 13208 9190 50  0000 C CNN
F 2 "TerminalBlock_MetzConnect:TerminalBlock_MetzConnect_Type073_RT02603HBLU_1x03_P5.08mm_Horizontal" H 13100 9000 50  0001 C CNN
F 3 "" H 13100 9000 50  0001 C CNN
	1    13100 9000
	1    0    0    -1  
$EndComp
$Comp
L power:GNDREF #PWR0119
U 1 1 5FB363AF
P 13800 9100
F 0 "#PWR0119" H 13800 8850 50  0001 C CNN
F 1 "GNDREF" H 13805 8927 50  0000 C CNN
F 2 "" H 13800 9100 50  0001 C CNN
F 3 "" H 13800 9100 50  0001 C CNN
	1    13800 9100
	1    0    0    -1  
$EndComp
$Comp
L power:+15V #PWR0120
U 1 1 5FB363B5
P 13500 8800
F 0 "#PWR0120" H 13500 8650 50  0001 C CNN
F 1 "+15V" H 13515 8973 50  0000 C CNN
F 2 "" H 13500 8800 50  0001 C CNN
F 3 "" H 13500 8800 50  0001 C CNN
	1    13500 8800
	1    0    0    -1  
$EndComp
$Comp
L power:-15V #PWR0121
U 1 1 5FB363BB
P 13500 9200
F 0 "#PWR0121" H 13500 9300 50  0001 C CNN
F 1 "-15V" H 13515 9373 50  0000 C CNN
F 2 "" H 13500 9200 50  0001 C CNN
F 3 "" H 13500 9200 50  0001 C CNN
	1    13500 9200
	-1   0    0    1   
$EndComp
Wire Wire Line
	13300 9100 13500 9100
Wire Wire Line
	13500 9100 13500 9200
Wire Wire Line
	13300 8900 13500 8900
Wire Wire Line
	13500 8900 13500 8800
Wire Wire Line
	13800 9000 13800 9100
Wire Wire Line
	13300 9000 13800 9000
$Comp
L Connector:Conn_01x03_Male J7
U 1 1 5FBD1CA9
P 12100 9000
F 0 "J7" H 12208 9281 50  0000 C CNN
F 1 "PowerSupply" H 12208 9190 50  0000 C CNN
F 2 "TerminalBlock_MetzConnect:TerminalBlock_MetzConnect_Type073_RT02603HBLU_1x03_P5.08mm_Horizontal" H 12100 9000 50  0001 C CNN
F 3 "" H 12100 9000 50  0001 C CNN
	1    12100 9000
	1    0    0    -1  
$EndComp
$Comp
L power:GNDREF #PWR0122
U 1 1 5FBD1CAF
P 12800 9100
F 0 "#PWR0122" H 12800 8850 50  0001 C CNN
F 1 "GNDREF" H 12805 8927 50  0000 C CNN
F 2 "" H 12800 9100 50  0001 C CNN
F 3 "" H 12800 9100 50  0001 C CNN
	1    12800 9100
	1    0    0    -1  
$EndComp
$Comp
L power:+15V #PWR0123
U 1 1 5FBD1CB5
P 12500 8800
F 0 "#PWR0123" H 12500 8650 50  0001 C CNN
F 1 "+15V" H 12515 8973 50  0000 C CNN
F 2 "" H 12500 8800 50  0001 C CNN
F 3 "" H 12500 8800 50  0001 C CNN
	1    12500 8800
	1    0    0    -1  
$EndComp
$Comp
L power:-15V #PWR0124
U 1 1 5FBD1CBB
P 12500 9200
F 0 "#PWR0124" H 12500 9300 50  0001 C CNN
F 1 "-15V" H 12515 9373 50  0000 C CNN
F 2 "" H 12500 9200 50  0001 C CNN
F 3 "" H 12500 9200 50  0001 C CNN
	1    12500 9200
	-1   0    0    1   
$EndComp
Wire Wire Line
	12300 9100 12500 9100
Wire Wire Line
	12500 9100 12500 9200
Wire Wire Line
	12300 8900 12500 8900
Wire Wire Line
	12500 8900 12500 8800
Wire Wire Line
	12800 9000 12800 9100
Wire Wire Line
	12300 9000 12800 9000
Connection ~ 7950 2000
$Comp
L Connector:TestPoint TP3
U 1 1 5FC89275
P 9050 1600
F 0 "TP3" H 9050 1925 50  0000 C CNN
F 1 "Mic1" H 9050 1834 50  0000 C CNN
F 2 "TestPoint:TestPoint_THTPad_D2.0mm_Drill1.0mm" H 9250 1600 50  0001 C CNN
F 3 "~" H 9250 1600 50  0001 C CNN
	1    9050 1600
	1    0    0    -1  
$EndComp
Connection ~ 9050 1600
$Comp
L Connector:TestPoint TP4
U 1 1 5FC89B55
P 9050 2350
F 0 "TP4" H 9050 2675 50  0000 C CNN
F 1 "Mic2" H 9050 2584 50  0000 C CNN
F 2 "TestPoint:TestPoint_THTPad_D2.0mm_Drill1.0mm" H 9250 2350 50  0001 C CNN
F 3 "~" H 9250 2350 50  0001 C CNN
	1    9050 2350
	1    0    0    -1  
$EndComp
$Comp
L Connector:TestPoint TP5
U 1 1 5FC8A1ED
P 9050 2850
F 0 "TP5" H 9050 3175 50  0000 C CNN
F 1 "Mic3" H 9050 3084 50  0000 C CNN
F 2 "TestPoint:TestPoint_THTPad_D2.0mm_Drill1.0mm" H 9250 2850 50  0001 C CNN
F 3 "~" H 9250 2850 50  0001 C CNN
	1    9050 2850
	1    0    0    -1  
$EndComp
$Comp
L Connector:TestPoint TP2
U 1 1 5FC8AC2C
P 9050 850
F 0 "TP2" H 9050 1083 50  0000 C CNN
F 1 "Stage" H 9050 1174 50  0000 C CNN
F 2 "TestPoint:TestPoint_THTPad_D2.0mm_Drill1.0mm" H 9250 850 50  0001 C CNN
F 3 "~" H 9250 850 50  0001 C CNN
	1    9050 850 
	1    0    0    -1  
$EndComp
Connection ~ 9050 850 
$Comp
L Connector:TestPoint TP8
U 1 1 5FC8BE08
P 9700 9000
F 0 "TP8" H 9700 9325 50  0000 C CNN
F 1 "Stage" H 9700 9234 50  0000 C CNN
F 2 "TestPoint:TestPoint_THTPad_D2.0mm_Drill1.0mm" H 9900 9000 50  0001 C CNN
F 3 "~" H 9900 9000 50  0001 C CNN
	1    9700 9000
	1    0    0    -1  
$EndComp
Connection ~ 9700 9000
Wire Wire Line
	9700 9000 9750 9000
$Comp
L Connector:TestPoint TP7
U 1 1 5FC8E79D
P 4300 5000
F 0 "TP7" H 4300 5325 50  0000 C CNN
F 1 "MicSum" H 4300 5234 50  0000 C CNN
F 2 "TestPoint:TestPoint_THTPad_D2.0mm_Drill1.0mm" H 4500 5000 50  0001 C CNN
F 3 "~" H 4500 5000 50  0001 C CNN
	1    4300 5000
	1    0    0    -1  
$EndComp
Connection ~ 4300 5000
Wire Wire Line
	4300 5000 4000 5000
$Comp
L Connector:TestPoint TP6
U 1 1 5FC8F283
P 11700 5000
F 0 "TP6" H 11700 5325 50  0000 C CNN
F 1 "MicSum" H 11700 5234 50  0000 C CNN
F 2 "TestPoint:TestPoint_THTPad_D2.0mm_Drill1.0mm" H 11900 5000 50  0001 C CNN
F 3 "~" H 11900 5000 50  0001 C CNN
	1    11700 5000
	1    0    0    -1  
$EndComp
Connection ~ 11700 5000
$Comp
L Connector:TestPoint TP9
U 1 1 5FC9AA71
P 1250 4650
F 0 "TP9" H 1250 4975 50  0000 C CNN
F 1 "Mic1" H 1250 4884 50  0000 C CNN
F 2 "TestPoint:TestPoint_THTPad_D2.0mm_Drill1.0mm" H 1450 4650 50  0001 C CNN
F 3 "~" H 1450 4650 50  0001 C CNN
	1    1250 4650
	1    0    0    -1  
$EndComp
Connection ~ 1250 4650
Wire Wire Line
	1250 4650 1600 4650
$Comp
L Connector:TestPoint TP10
U 1 1 5FC9B2AB
P 1250 5000
F 0 "TP10" H 1193 5118 50  0000 R CNN
F 1 "Mic2" H 1193 5027 50  0000 R CNN
F 2 "TestPoint:TestPoint_THTPad_D2.0mm_Drill1.0mm" H 1450 5000 50  0001 C CNN
F 3 "~" H 1450 5000 50  0001 C CNN
	1    1250 5000
	1    0    0    -1  
$EndComp
$Comp
L Connector:TestPoint TP11
U 1 1 5FC9BB36
P 1250 5350
F 0 "TP11" H 1193 5468 50  0000 R CNN
F 1 "Mic3" H 1193 5377 50  0000 R CNN
F 2 "TestPoint:TestPoint_THTPad_D2.0mm_Drill1.0mm" H 1450 5350 50  0001 C CNN
F 3 "~" H 1450 5350 50  0001 C CNN
	1    1250 5350
	1    0    0    -1  
$EndComp
Wire Wire Line
	1250 5000 1600 5000
Wire Wire Line
	1250 5350 1600 5350
Wire Wire Line
	10950 2250 11300 2250
Wire Wire Line
	12300 2650 12400 2650
Wire Wire Line
	12700 2650 12800 2650
Text Notes 3000 10100 0    50   ~ 10
Balanced Line Input Converter\nGain: 1\n220pF for HF rolloff (20 kHz)
Wire Wire Line
	4000 2000 4100 2000
Connection ~ 2300 5200
Wire Wire Line
	2300 5200 2300 4800
Wire Wire Line
	11700 5000 12800 5000
$Comp
L Device:R R3
U 1 1 601CC821
P 3500 8750
F 0 "R3" V 3707 8750 50  0000 C CNN
F 1 "10K" V 3616 8750 50  0000 C CNN
F 2 "Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal" V 3430 8750 50  0001 C CNN
F 3 "~" H 3500 8750 50  0001 C CNN
	1    3500 8750
	0    -1   -1   0   
$EndComp
$Comp
L Device:C C27
U 1 1 601CD9A5
P 3750 9000
F 0 "C27" H 3865 9046 50  0000 L CNN
F 1 "220p" H 3865 8955 50  0000 L CNN
F 2 "Capacitor_THT:C_Disc_D5.0mm_W2.5mm_P5.00mm" H 3788 8850 50  0001 C CNN
F 3 "~" H 3750 9000 50  0001 C CNN
	1    3750 9000
	1    0    0    -1  
$EndComp
$Comp
L Device:R R8
U 1 1 601CF7CB
P 3500 9250
F 0 "R8" V 3707 9250 50  0000 C CNN
F 1 "10K" V 3616 9250 50  0000 C CNN
F 2 "Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal" V 3430 9250 50  0001 C CNN
F 3 "~" H 3500 9250 50  0001 C CNN
	1    3500 9250
	0    -1   -1   0   
$EndComp
$Comp
L Device:R R4
U 1 1 601D068B
P 3150 9000
F 0 "R4" H 3080 8954 50  0000 R CNN
F 1 "3.3K" H 3080 9045 50  0000 R CNN
F 2 "Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal" V 3080 9000 50  0001 C CNN
F 3 "~" H 3150 9000 50  0001 C CNN
	1    3150 9000
	-1   0    0    1   
$EndComp
Connection ~ 4250 8750
Wire Wire Line
	4250 8750 4250 8450
Wire Wire Line
	4250 8750 4250 8900
Connection ~ 4250 9250
Wire Wire Line
	4250 9250 4250 9300
Wire Wire Line
	4250 9100 4250 9250
Wire Wire Line
	3150 8750 3150 8850
Connection ~ 3150 8750
Wire Wire Line
	3150 8750 3350 8750
Wire Wire Line
	3150 9150 3150 9250
Wire Wire Line
	3150 9250 3350 9250
Wire Wire Line
	3650 9250 3750 9250
Wire Wire Line
	3750 9250 3750 9150
Wire Wire Line
	3650 8750 3750 8750
Wire Wire Line
	3750 8750 3750 8850
Wire Wire Line
	3750 8750 3850 8750
Connection ~ 3750 8750
Wire Wire Line
	3750 9250 3850 9250
Connection ~ 3750 9250
Wire Wire Line
	2250 8700 2250 9250
Connection ~ 3150 9250
Wire Wire Line
	2250 9250 3150 9250
Wire Wire Line
	2800 8750 3150 8750
Wire Wire Line
	5050 9000 6000 9000
Wire Wire Line
	6500 8600 6150 8600
Wire Wire Line
	6500 9000 6600 9000
Wire Wire Line
	6500 8600 6500 9000
Wire Wire Line
	7100 9200 8000 9200
Wire Wire Line
	6900 9000 7100 9000
Connection ~ 7100 9000
Wire Wire Line
	7100 9000 7100 9200
Wire Wire Line
	9100 9000 9700 9000
Connection ~ 9100 9000
Wire Wire Line
	4100 2000 5100 2000
Connection ~ 4100 2000
Text Notes 11600 2900 0    50   ~ 0
TODO:\nLog./ Lin.?
Text Notes 9450 700  0    50   ~ 0
TODO:\nLog./ Lin.?
Text Notes 6450 1800 0    50   ~ 0
TODO:\nLog./ Lin.?
Wire Wire Line
	12800 1900 12800 2650
Wire Wire Line
	9050 2350 9550 2350
Wire Wire Line
	9050 2850 9550 2850
Wire Wire Line
	9050 1600 9550 1600
Wire Wire Line
	9050 850  9550 850 
Wire Wire Line
	9800 2150 10150 2150
Connection ~ 10150 2150
Wire Wire Line
	7700 2000 7950 2000
Wire Wire Line
	11300 2000 12150 2000
Connection ~ 9800 2150
Wire Wire Line
	9800 2150 9800 2600
Wire Wire Line
	10950 1550 10950 2250
Wire Wire Line
	10150 1550 10150 2150
$EndSCHEMATC