<?xml version="1.0" encoding="utf-8"?>
<!DOCTYPE eagle SYSTEM "eagle.dtd">
<eagle version="7.7.0">
<drawing>
<board>
<plain>
<wire x1="0.12203125" y1="49.884790625" x2="2.8912625" y2="1.884784375" width="0" layer="20"/>
<wire x1="2.8912625" y1="1.884784375" x2="4.887940625" y2="0" width="0" layer="20" curve="86.698028"/>
<wire x1="4.887940625" y1="0" x2="36.112059375" y2="0" width="0" layer="20"/>
<wire x1="36.112059375" y1="0" x2="38.1087375" y2="1.884784375" width="0" layer="20" curve="86.697486"/>
<wire x1="38.1087375" y1="1.884784375" x2="40.87796875" y2="49.884790625" width="0" layer="20"/>
<wire x1="40.87796875" y1="49.884790625" x2="38.881290625" y2="52" width="0" layer="20" curve="93.301793"/>
<wire x1="38.881290625" y1="52" x2="2.118709375" y2="52" width="0" layer="20"/>
<wire x1="2.118709375" y1="52" x2="0.12203125" y2="49.884790625" width="0" layer="20" curve="93.302335"/>
<text>41mm top x 52mm long x 35mm bottom

Screws 22mm from top</text>
<hole x="37.5" y="30" drill="1.583"/>
<hole x="3.5" y="30" drill="1.583"/>
<hole x="4.25" y="27.5" drill="1.583"/>
<hole x="36.75" y="27.5" drill="1.583"/>
</plain>
<libraries>
<library name="potentiometers">
<packages>
<package name="2262_TRIM">
<description>&lt;b&gt;Potentiometer&lt;/b&gt;&lt;p&gt;
1/4" on-board trim potentiometer</description>
</package>
</packages>
</library>
<library name="capacitors-elec">
<packages>
<package name="050_020_1">
<description>&lt;b&gt;5mm diameter, 2mm lead spacing, 0.1" pad spacing&lt;/b&gt;</description>
</package>
<package name="080_035">
<description>&lt;b&gt;8mm diameter, 3.5 mm lead spacing&lt;/b&gt;
&lt;p&gt;7mm height/length and more</description>
</package>
</packages>
</library>
<library name="capacitors-film">
<packages>
<package name="BOX_SMALL">
</package>
<package name="BOX_MED">
</package>
<package name="050X030_025_2">
<description>&lt;b&gt;5mm x 3mm, 0.2" pad spacing&lt;/b&gt;</description>
</package>
<package name="BOX_BIG">
</package>
</packages>
</library>
<library name="1776_SUPPLY">
<description>&lt;b&gt;Supply&lt;/b&gt;
&lt;ul&gt;
&lt;li&gt;input, output, ground, and power supply.  
&lt;li&gt;these are used on a schematic for placeholders and on a board for pads for off-board components like jacks.
&lt;/ul&gt;</description>
<packages>
<package name="OCTOGON">
<description>&lt;b&gt;Octogonal Pad&lt;/b&gt;
&lt;ul&gt;&lt;li&gt;drill diameter 0.7 mm&lt;/li&gt;&lt;/ul&gt;</description>
</package>
</packages>
</library>
<library name="transistors">
<packages>
<package name="TO92-">
</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="inductors">
<packages>
<package name="7MM">
</package>
</packages>
</library>
<library name="switches">
<packages>
<package name="SPDT">
</package>
</packages>
</library>
</libraries>
<attributes>
</attributes>
<variantdefs>
</variantdefs>
<elements>
<element name="BIAS" library="potentiometers" package="2262_TRIM" value="5K"/>
<element name="C12" library="capacitors-elec" package="050_020_1" value="22uF"/>
<element name="C3" library="capacitors-film" package="BOX_SMALL" value="5n6"/>
<element name="C10" library="capacitors-elec" package="080_035" value="100uF"/>
<element name="FRONT" library="1776_SUPPLY" package="OCTOGON" value="Capsule">
<attribute name="NAME"/>
</element>
<element name="Q1" library="transistors" package="TO92-" value="2SK170"/>
<element name="Q2" library="transistors" package="TO92-" value="2N4403"/>
<element name="R9" library="resistors" package="R0207/3" value="4.7K"/>
<element name="L1" library="inductors" package="7MM" value="47uH"/>
<element name="L2" library="inductors" package="7MM" value="47uH"/>
<element name="R1" library="resistors" package="R0207/3" value="1G"/>
<element name="R2" library="resistors" package="R0207/3" value="22K"/>
<element name="XLR1" library="1776_SUPPLY" package="OCTOGON" value="XLR2">
<attribute name="NAME"/>
</element>
<element name="XLR2" library="1776_SUPPLY" package="OCTOGON" value="XLR2">
<attribute name="NAME"/>
</element>
<element name="XLR3" library="1776_SUPPLY" package="OCTOGON" value="XLR3">
<attribute name="NAME"/>
</element>
<element name="G" library="1776_SUPPLY" package="OCTOGON" value="">
<attribute name="NAME"/>
</element>
<element name="C1" library="capacitors-film" package="050X030_025_2" value="10pF"/>
<element name="." library="1776_SUPPLY" package="OCTOGON" value="Capsule"/>
<element name="R5" library="resistors" package="R0207/3" value="2k2"/>
<element name="R6" library="resistors" package="R0207/3" value="2k2"/>
<element name="CT" library="1776_SUPPLY" package="OCTOGON" value="XLR2">
<attribute name="NAME"/>
</element>
<element name="R7" library="resistors" package="R0207/3" value="4k7"/>
<element name="C9" library="capacitors-film" package="BOX_MED" value="100nF"/>
<element name="C4" library="capacitors-film" package="BOX_SMALL" value="4n7"/>
<element name="C5" library="capacitors-film" package="BOX_SMALL" value="100nF"/>
<element name="C13" library="capacitors-elec" package="050_020_1" value="22uF"/>
<element name="R4" library="resistors" package="R0207/3" value="10K"/>
<element name="C6" library="capacitors-film" package="BOX_BIG" value="4.7uF"/>
<element name="R8" library="resistors" package="R0207/3" value="4.7K"/>
<element name="PAD" library="switches" package="SPDT" value=""/>
<element name="C2" library="capacitors-film" package="050X030_025_2" value="33pF"/>
<element name="HPF" library="switches" package="SPDT" value=""/>
<element name="R3" library="resistors" package="R0207/3" value="220K"/>
<element name="C11" library="capacitors-elec" package="050_020_1" value="22uF"/>
<element name="XP-" library="1776_SUPPLY" package="OCTOGON" value="XLR3">
<attribute name="NAME"/>
</element>
<element name="XP+" library="1776_SUPPLY" package="OCTOGON" value="XLR3">
<attribute name="NAME"/>
</element>
<element name="C7" library="capacitors-film" package="050X030_025_2" value="330pF"/>
<element name="C8" library="capacitors-film" package="050X030_025_2" value="330pF"/>
<element name="XS+" library="1776_SUPPLY" package="OCTOGON" value="XS+">
<attribute name="NAME"/>
</element>
<element name="XS-" library="1776_SUPPLY" package="OCTOGON" value="XP+">
<attribute name="NAME"/>
</element>
<element name="Q3" library="transistors" package="TO92-" value="2SK170"/>
<element name="G3" library="1776_SUPPLY" package="OCTOGON" value="">
<attribute name="NAME"/>
</element>
<element name="G2" library="1776_SUPPLY" package="OCTOGON" value="">
<attribute name="NAME"/>
</element>
<element name="XS+1" library="1776_SUPPLY" package="OCTOGON" value="XLR3"/>
<element name="XS+2" library="1776_SUPPLY" package="OCTOGON" value="XLR3"/>
<element name="XS+3" library="1776_SUPPLY" package="OCTOGON" value="XLR3"/>
<element name="XS+4" library="1776_SUPPLY" package="OCTOGON" value="XLR3"/>
<element name="R10" library="resistors" package="R0207/3" value="10M"/>
<element name="R11" library="resistors" package="R0207/3" value="10M"/>
<element name="R12" library="resistors" package="R0207/3" value="100M"/>
<element name="C14" library="capacitors-film" package="BOX_SMALL" value="100nF"/>
<element name="C15" library="capacitors-film" package="BOX_SMALL" value="100nF"/>
<element name="C16" library="capacitors-film" package="BOX_SMALL" value="100nF"/>
<element name="BACK" library="1776_SUPPLY" package="OCTOGON" value="Capsule">
<attribute name="NAME"/>
</element>
<element name="C-LPF" library="capacitors-film" package="050X030_025_2" value="*">
<attribute name="NAME"/>
</element>
<element name="RLPF" library="resistors" package="R0207/3" value="*"/>
</elements>
<signals>
<signal name="N$1">
<contactref element="Q1" pad="1"/>
<contactref element="R2" pad="1"/>
<contactref element="C3" pad="1"/>
<contactref element="C2" pad="2"/>
<contactref element="C1" pad="2"/>
<contactref element="HPF" pad="2"/>
<contactref element="Q3" pad="1"/>
<contactref element="C-LPF" pad="2"/>
</signal>
<signal name="N$2">
<contactref element="Q1" pad="3"/>
<contactref element="BIAS" pad="1"/>
<contactref element="C13" pad="+"/>
<contactref element="BIAS" pad="2"/>
<contactref element="." pad="1"/>
<contactref element="Q3" pad="3"/>
</signal>
<signal name="GND">
<contactref element="BIAS" pad="3"/>
<contactref element="C12" pad="-"/>
<contactref element="C10" pad="-"/>
<contactref element="C9" pad="2"/>
<contactref element="Q2" pad="1"/>
<contactref element="C13" pad="-"/>
<contactref element="R1" pad="1"/>
<contactref element="R3" pad="1"/>
<contactref element="C11" pad="-"/>
<contactref element="C8" pad="1"/>
<contactref element="C7" pad="2"/>
<contactref element="XLR1" pad="1"/>
<contactref element="G" pad="1"/>
<contactref element="XP-" pad="1"/>
<contactref element="G3" pad="1"/>
<contactref element="G2" pad="1"/>
<contactref element="C16" pad="2"/>
<contactref element="C15" pad="2"/>
<contactref element="C14" pad="2"/>
<contactref element="RLPF" pad="1"/>
</signal>
<signal name="N$12">
<contactref element="C12" pad="+"/>
<contactref element="R2" pad="2"/>
<contactref element="R9" pad="1"/>
</signal>
<signal name="N$16">
<contactref element="L1" pad="1"/>
<contactref element="XLR2" pad="1"/>
</signal>
<signal name="N$17">
<contactref element="L2" pad="1"/>
<contactref element="XLR3" pad="1"/>
</signal>
<signal name="N$3">
<contactref element="FRONT" pad="1"/>
<contactref element="Q1" pad="2"/>
<contactref element="R1" pad="2"/>
<contactref element="PAD" pad="2"/>
<contactref element="Q3" pad="2"/>
</signal>
<signal name="N$21">
</signal>
<signal name="N$5">
<contactref element="R5" pad="1"/>
<contactref element="R6" pad="2"/>
<contactref element="CT" pad="1"/>
<contactref element="R7" pad="1"/>
<contactref element="R10" pad="1"/>
</signal>
<signal name="N$4">
<contactref element="R9" pad="2"/>
<contactref element="R8" pad="2"/>
<contactref element="C10" pad="+"/>
<contactref element="R7" pad="2"/>
<contactref element="C9" pad="1"/>
</signal>
<signal name="N$6">
<contactref element="Q2" pad="3"/>
<contactref element="R4" pad="1"/>
<contactref element="C6" pad="2"/>
<contactref element="XS+1" pad="1"/>
<contactref element="XS+2" pad="1"/>
</signal>
<signal name="N$8">
<contactref element="R6" pad="1"/>
<contactref element="L2" pad="2"/>
<contactref element="C8" pad="2"/>
<contactref element="XS-" pad="1"/>
</signal>
<signal name="N$9">
<contactref element="R4" pad="2"/>
<contactref element="R8" pad="1"/>
<contactref element="C11" pad="+"/>
</signal>
<signal name="N$10">
<contactref element="PAD" pad="1"/>
<contactref element="C1" pad="1"/>
</signal>
<signal name="N$13">
<contactref element="PAD" pad="3"/>
<contactref element="C2" pad="1"/>
</signal>
<signal name="N$14">
<contactref element="C4" pad="2"/>
<contactref element="HPF" pad="3"/>
</signal>
<signal name="N$15">
<contactref element="C5" pad="2"/>
<contactref element="HPF" pad="1"/>
</signal>
<signal name="N$18">
<contactref element="Q2" pad="2"/>
<contactref element="R3" pad="2"/>
<contactref element="C3" pad="2"/>
<contactref element="C5" pad="1"/>
<contactref element="C4" pad="1"/>
</signal>
<signal name="N$19">
<contactref element="R5" pad="2"/>
<contactref element="L1" pad="2"/>
<contactref element="C7" pad="1"/>
<contactref element="XS+" pad="1"/>
</signal>
<signal name="N$20">
<contactref element="C6" pad="1"/>
<contactref element="XP+" pad="1"/>
<contactref element="XS+3" pad="1"/>
<contactref element="XS+4" pad="1"/>
</signal>
<signal name="N$7">
<contactref element="R12" pad="1"/>
<contactref element="R11" pad="2"/>
<contactref element="C15" pad="1"/>
</signal>
<signal name="N$11">
<contactref element="R11" pad="1"/>
<contactref element="R10" pad="2"/>
<contactref element="C14" pad="1"/>
</signal>
<signal name="N$23">
<contactref element="R12" pad="2"/>
<contactref element="C16" pad="1"/>
<contactref element="BACK" pad="1"/>
</signal>
<signal name="N$22">
<contactref element="C-LPF" pad="1"/>
<contactref element="RLPF" pad="2"/>
</signal>
</signals>
</board>
</drawing>
</eagle>
