<?xml version="1.0" encoding="utf-8"?>
<!DOCTYPE eagle SYSTEM "eagle.dtd">
<eagle version="7.7.0">
<drawing>
<board>
<plain>
<wire x1="0" y1="0" x2="58.42" y2="0" width="0" layer="20"/>
<wire x1="58.42" y1="0" x2="58.42" y2="59.69" width="0" layer="20"/>
<wire x1="58.42" y1="59.69" x2="38.1" y2="59.69" width="0" layer="20"/>
<wire x1="38.1" y1="59.69" x2="38.1" y2="68.58" width="0" layer="20"/>
<wire x1="38.1" y1="68.58" x2="20.32" y2="68.58" width="0" layer="20"/>
<wire x1="20.32" y1="68.58" x2="20.32" y2="60.325" width="0" layer="20"/>
<wire x1="20.32" y1="60.325" x2="0" y2="60.325" width="0" layer="20"/>
<wire x1="0" y1="60.325" x2="0" y2="0" width="0" layer="20"/>
<text>beod</text>
</plain>
<libraries>
<library name="potentiometers">
<packages>
<package name="16MM_B.MOUNT">
<description>&lt;b&gt;16mm / Right-Angle /  PC Mount / Short Pin&lt;/b&gt;
&lt;p&gt;
For bottom-mount potentiometers
&lt;p&gt;
&lt;a href="http://smallbear-electronics.mybigcommerce.com/alpha-single-gang-16mm-right-angle-pc-mount/"&gt;http://smallbear-electronics.mybigcommerce.com/alpha-single-gang-16mm-right-angle-pc-mount/&lt;/a&gt;</description>
</package>
<package name="TRIM1">
<description>&lt;b&gt;Bourns 3362p&lt;/b&gt;
&lt;p&gt;
&lt;a href="http://www.taydaelectronics.com/potentiometer-variable-resistors/cermet-potentiometers/3362p.html"&gt;http://www.taydaelectronics.com/potentiometer-variable-resistors/cermet-potentiometers/3362p.html&lt;/a&gt;</description>
</package>
</packages>
</library>
<library name="capacitors-film">
<packages>
<package name="050X030_025_2">
<description>&lt;b&gt;5mm x 3mm, 0.2" pad spacing&lt;/b&gt;</description>
</package>
</packages>
</library>
<library name="caps-elec">
<packages>
<package name="0632">
<description>0.1" (2.54mm) spacing</description>
</package>
<package name="0502">
<description>0.1" (2.54mm) spacing</description>
</package>
</packages>
</library>
<library name="diodes">
<packages>
<package name="3MM_2">
</package>
<package name="DO35-3">
<description>&lt;B&gt;DO-35 0.3" spacing&lt;/B&gt;</description>
</package>
<package name="DO41-3">
<description>&lt;b&gt;DO-41 0.3" pad spacing&lt;/b&gt;</description>
</package>
</packages>
</library>
<library name="integrated circuits">
<packages>
<package name="DIP08">
<description>&lt;b&gt;Dual In Line Package&lt;/b&gt;</description>
</package>
</packages>
</library>
<library name="resistors">
<packages>
<package name="R0207/3">
<description>&lt;b&gt;RESISTOR&lt;/b&gt;&lt;br&gt;
&lt;br&gt;
length: 6mm&lt;br&gt;
format: 0.1" (perfboard)&lt;br&gt;
spacing: 3 holes

&lt;p&gt;This length resistor applies to 1/4 watt metal film.</description>
</package>
</packages>
</library>
<library name="supply pins">
<packages>
<package name="IO.1">
</package>
</packages>
</library>
<library name="jacks">
<packages>
<package name="DC_TS">
</package>
<package name="2PADS">
</package>
</packages>
</library>
<library name="caps-film">
<packages>
<package name="0.2&quot;.SML">
<description>0.2" (5.08mm) spacing
&lt;p&gt;
&lt;b&gt; 
10pf - 180n&lt;/b&gt;</description>
</package>
</packages>
</library>
</libraries>
<attributes>
</attributes>
<variantdefs>
</variantdefs>
<elements>
<element name="BASS" library="potentiometers" package="16MM_B.MOUNT" value="100kC"/>
<element name="C1" library="capacitors-film" package="050X030_025_2" value="22n"/>
<element name="C10" library="capacitors-film" package="050X030_025_2" value="10n"/>
<element name="C11" library="capacitors-film" package="050X030_025_2" value="4n7"/>
<element name="C12" library="capacitors-film" package="050X030_025_2" value="22n"/>
<element name="C13" library="capacitors-film" package="050X030_025_2" value="220n"/>
<element name="C14" library="capacitors-film" package="050X030_025_2" value="220n"/>
<element name="C15" library="caps-elec" package="0632" value="100uF"/>
<element name="C16" library="capacitors-film" package="050X030_025_2" value="100n"/>
<element name="C17" library="caps-elec" package="0502" value="10uF"/>
<element name="C2" library="capacitors-film" package="050X030_025_2" value="47pF"/>
<element name="C3" library="capacitors-film" package="050X030_025_2" value="10n"/>
<element name="C4" library="capacitors-film" package="050X030_025_2" value="1n"/>
<element name="C5" library="capacitors-film" package="050X030_025_2" value="100n"/>
<element name="C6" library="capacitors-film" package="050X030_025_2" value="47pF"/>
<element name="C7" library="capacitors-film" package="050X030_025_2" value="47n"/>
<element name="C8" library="capacitors-film" package="050X030_025_2" value="120pF"/>
<element name="C9" library="caps-film" package="0.2&quot;.SML" value="100pF"/>
<element name="D1" library="diodes" package="3MM_2" value="LED.3"/>
<element name="D2" library="diodes" package="3MM_2" value="LED.3"/>
<element name="D3" library="diodes" package="3MM_2" value="LED.3"/>
<element name="D4" library="diodes" package="3MM_2" value="LED.3"/>
<element name="D5" library="diodes" package="DO35-3" value=""/>
<element name="D6" library="diodes" package="DO35-3" value=""/>
<element name="D7" library="diodes" package="DO35-3" value=""/>
<element name="D8" library="diodes" package="DO35-3" value="BAT54"/>
<element name="D9" library="diodes" package="DO41-3" value="1N5817"/>
<element name="GAIN" library="potentiometers" package="16MM_B.MOUNT" value="1MB"/>
<element name="IC1" library="integrated circuits" package="DIP08" value="TL072">
<attribute name="NAME"/>
</element>
<element name="IC2" library="integrated circuits" package="DIP08" value="TL072">
<attribute name="NAME"/>
</element>
<element name="IC3" library="integrated circuits" package="DIP08" value="TL072">
<attribute name="NAME"/>
</element>
<element name="PRES" library="potentiometers" package="16MM_B.MOUNT" value="10kC"/>
<element name="R1" library="resistors" package="R0207/3" value="1M"/>
<element name="R10" library="resistors" package="R0207/3" value="22k"/>
<element name="R11" library="resistors" package="R0207/3" value="220k"/>
<element name="R12" library="resistors" package="R0207/3" value="22k"/>
<element name="R13" library="resistors" package="R0207/3" value="10k"/>
<element name="R14" library="resistors" package="R0207/3" value="10k"/>
<element name="R15" library="resistors" package="R0207/3" value="2k2"/>
<element name="R16" library="resistors" package="R0207/3" value="22k"/>
<element name="R17" library="resistors" package="R0207/3" value="22k"/>
<element name="R18" library="resistors" package="R0207/3" value="10k"/>
<element name="R19" library="resistors" package="R0207/3" value="10R"/>
<element name="R2" library="resistors" package="R0207/3" value="470k"/>
<element name="R20" library="resistors" package="R0207/3" value="4k7"/>
<element name="R21" library="resistors" package="R0207/3" value="10k"/>
<element name="R22" library="resistors" package="R0207/3" value="10k"/>
<element name="R23" library="resistors" package="R0207/3" value="2k2"/>
<element name="R3" library="resistors" package="R0207/3" value="10k"/>
<element name="R4" library="resistors" package="R0207/3" value="39k"/>
<element name="R5" library="resistors" package="R0207/3" value="22k"/>
<element name="R6" library="resistors" package="R0207/3" value="4k7"/>
<element name="R7" library="resistors" package="R0207/3" value="10k"/>
<element name="R8" library="resistors" package="R0207/3" value="22k"/>
<element name="R9" library="resistors" package="R0207/3" value="22k"/>
<element name="T1" library="potentiometers" package="TRIM1" value="100k">
<attribute name="NAME"/>
</element>
<element name="TIGHT" library="potentiometers" package="16MM_B.MOUNT" value="100kC"/>
<element name="TREB" library="potentiometers" package="16MM_B.MOUNT" value="100kB"/>
<element name="VOL" library="potentiometers" package="16MM_B.MOUNT" value="50kA"/>
<element name="BYP.1" library="supply pins" package="IO.1" value="BYP.1"/>
<element name="+9V" library="jacks" package="DC_TS" value="DC_TS"/>
<element name="J1" library="jacks" package="2PADS" value=""/>
<element name="J2" library="jacks" package="2PADS" value=""/>
</elements>
<signals>
<signal name="N$2">
<contactref element="R4" pad="1"/>
<contactref element="R5" pad="2"/>
<contactref element="IC1" pad="2"/>
</signal>
<signal name="N$3">
<contactref element="R4" pad="2"/>
<contactref element="C3" pad="2"/>
<contactref element="IC1" pad="1"/>
</signal>
<signal name="N$4">
<contactref element="R2" pad="1"/>
<contactref element="R3" pad="1"/>
<contactref element="C1" pad="1"/>
</signal>
<signal name="IN">
<contactref element="C1" pad="2"/>
<contactref element="R1" pad="2"/>
<contactref element="BYP.1" pad="IN"/>
</signal>
<signal name="VB">
<contactref element="R5" pad="1"/>
<contactref element="TIGHT" pad="1"/>
<contactref element="TIGHT" pad="2"/>
<contactref element="IC2" pad="3"/>
<contactref element="D3" pad="P$1"/>
<contactref element="D4" pad="ANODE"/>
<contactref element="IC1" pad="6"/>
<contactref element="IC1" pad="7"/>
<contactref element="IC3" pad="3"/>
</signal>
<signal name="GND">
<contactref element="R1" pad="1"/>
<contactref element="C2" pad="2"/>
<contactref element="C4" pad="2"/>
<contactref element="C11" pad="2"/>
<contactref element="BASS" pad="1"/>
<contactref element="BASS" pad="2"/>
<contactref element="VOL" pad="1"/>
<contactref element="IC3" pad="4"/>
<contactref element="IC2" pad="4"/>
<contactref element="IC1" pad="4"/>
<contactref element="C16" pad="2"/>
<contactref element="R22" pad="1"/>
<contactref element="C15" pad="-"/>
<contactref element="C17" pad="-"/>
<contactref element="C5" pad="2"/>
<contactref element="C10" pad="2"/>
<contactref element="BYP.1" pad="G"/>
<contactref element="+9V" pad="GND"/>
<contactref element="J1" pad="S"/>
<contactref element="J2" pad="S"/>
</signal>
<signal name="N$10">
<contactref element="C3" pad="1"/>
<contactref element="R6" pad="2"/>
<contactref element="R7" pad="1"/>
</signal>
<signal name="N$11">
<contactref element="R7" pad="2"/>
<contactref element="C4" pad="1"/>
<contactref element="IC2" pad="5"/>
</signal>
<signal name="N$13">
<contactref element="C6" pad="1"/>
<contactref element="D1" pad="ANODE"/>
<contactref element="D2" pad="P$1"/>
<contactref element="GAIN" pad="2"/>
<contactref element="GAIN" pad="3"/>
<contactref element="C7" pad="2"/>
<contactref element="IC2" pad="7"/>
</signal>
<signal name="N$14">
<contactref element="R6" pad="1"/>
<contactref element="TIGHT" pad="3"/>
</signal>
<signal name="N$16">
<contactref element="C7" pad="1"/>
<contactref element="R10" pad="1"/>
</signal>
<signal name="N$8">
<contactref element="C9" pad="2"/>
<contactref element="T1" pad="1"/>
<contactref element="R14" pad="1"/>
</signal>
<signal name="N$17">
<contactref element="C9" pad="1"/>
<contactref element="T1" pad="3"/>
<contactref element="T1" pad="2"/>
<contactref element="PRES" pad="1"/>
<contactref element="PRES" pad="2"/>
<contactref element="IC3" pad="1"/>
</signal>
<signal name="N$19">
<contactref element="D4" pad="P$1"/>
<contactref element="D3" pad="ANODE"/>
<contactref element="TREB" pad="3"/>
<contactref element="R15" pad="2"/>
<contactref element="C10" pad="1"/>
</signal>
<signal name="N$22">
<contactref element="TREB" pad="1"/>
<contactref element="C11" pad="1"/>
</signal>
<signal name="N$23">
<contactref element="TREB" pad="2"/>
<contactref element="IC3" pad="5"/>
</signal>
<signal name="N$24">
<contactref element="C12" pad="2"/>
<contactref element="R16" pad="2"/>
<contactref element="IC3" pad="6"/>
</signal>
<signal name="N$25">
<contactref element="C12" pad="1"/>
<contactref element="R17" pad="2"/>
<contactref element="C14" pad="2"/>
<contactref element="IC3" pad="7"/>
</signal>
<signal name="N$26">
<contactref element="C13" pad="2"/>
<contactref element="BASS" pad="3"/>
</signal>
<signal name="N$27">
<contactref element="R17" pad="1"/>
<contactref element="C13" pad="1"/>
<contactref element="R16" pad="1"/>
</signal>
<signal name="N$28">
<contactref element="C14" pad="1"/>
<contactref element="R18" pad="1"/>
</signal>
<signal name="N$29">
<contactref element="R18" pad="2"/>
<contactref element="VOL" pad="3"/>
</signal>
<signal name="OUT">
<contactref element="VOL" pad="2"/>
<contactref element="BYP.1" pad="OUT"/>
</signal>
<signal name="N$31">
<contactref element="R10" pad="2"/>
<contactref element="R11" pad="1"/>
<contactref element="R12" pad="2"/>
<contactref element="IC2" pad="2"/>
</signal>
<signal name="N$32">
<contactref element="R11" pad="2"/>
<contactref element="C8" pad="1"/>
<contactref element="D6" pad="C"/>
<contactref element="D7" pad="A"/>
<contactref element="R13" pad="1"/>
<contactref element="IC2" pad="1"/>
</signal>
<signal name="N$33">
<contactref element="D7" pad="C"/>
<contactref element="D8" pad="A"/>
</signal>
<signal name="N$34">
<contactref element="D5" pad="C"/>
<contactref element="D6" pad="A"/>
</signal>
<signal name="N$35">
<contactref element="D5" pad="A"/>
<contactref element="R12" pad="1"/>
<contactref element="D8" pad="C"/>
<contactref element="C8" pad="2"/>
</signal>
<signal name="VC">
<contactref element="IC1" pad="8"/>
<contactref element="IC2" pad="8"/>
<contactref element="IC3" pad="8"/>
<contactref element="C16" pad="1"/>
<contactref element="R20" pad="2"/>
<contactref element="R21" pad="1"/>
<contactref element="R19" pad="2"/>
<contactref element="C15" pad="+"/>
</signal>
<signal name="VR">
<contactref element="R21" pad="2"/>
<contactref element="R22" pad="2"/>
<contactref element="R23" pad="1"/>
<contactref element="C17" pad="+"/>
<contactref element="R2" pad="2"/>
</signal>
<signal name="N$9">
<contactref element="D9" pad="C"/>
<contactref element="R19" pad="1"/>
</signal>
<signal name="N$20">
<contactref element="R13" pad="2"/>
<contactref element="R14" pad="2"/>
<contactref element="IC3" pad="2"/>
</signal>
<signal name="N$1">
<contactref element="R3" pad="2"/>
<contactref element="C2" pad="1"/>
<contactref element="IC1" pad="3"/>
</signal>
<signal name="N$37">
<contactref element="R8" pad="1"/>
<contactref element="C5" pad="1"/>
</signal>
<signal name="N$15">
<contactref element="PRES" pad="3"/>
<contactref element="R15" pad="1"/>
</signal>
<signal name="N$36">
<contactref element="C6" pad="2"/>
<contactref element="R9" pad="2"/>
<contactref element="R8" pad="2"/>
<contactref element="IC2" pad="6"/>
</signal>
<signal name="N$12">
<contactref element="D1" pad="P$1"/>
<contactref element="D2" pad="ANODE"/>
<contactref element="R9" pad="1"/>
<contactref element="GAIN" pad="1"/>
</signal>
<signal name="N$21">
<contactref element="R23" pad="2"/>
<contactref element="IC1" pad="5"/>
</signal>
<signal name="N$6">
<contactref element="R20" pad="1"/>
<contactref element="BYP.1" pad="+"/>
</signal>
<signal name="N$7">
<contactref element="BYP.1" pad="-"/>
<contactref element="BYP.1" pad="SW"/>
</signal>
<signal name="N$5">
<contactref element="D9" pad="A"/>
<contactref element="+9V" pad="PWR"/>
</signal>
<signal name="N$18">
<contactref element="J1" pad="T"/>
<contactref element="BYP.1" pad="J1"/>
</signal>
<signal name="N$30">
<contactref element="J2" pad="T"/>
<contactref element="BYP.1" pad="J2"/>
</signal>
</signals>
</board>
</drawing>
</eagle>
