<?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="40.64" y2="0" width="0" layer="20"/>
<wire x1="40.64" y1="0" x2="40.64" y2="44.45" width="0" layer="20"/>
<wire x1="40.64" y1="44.45" x2="0" y2="44.45" width="0" layer="20"/>
<wire x1="0" y1="44.45" x2="0" y2="0" width="0" layer="20"/>
<hole x="38.1" y="2.54" drill="3.048"/>
<hole x="2.54" y="2.54" drill="3.048"/>
<text>+ M G</text>
<text>+ M G</text>
<hole x="2.54" y="41.91" drill="3.048"/>
<hole x="38.1" y="41.91" drill="3.048"/>
<text>DUAL MICROPHONE PREAMP</text>
<text>20200504</text>
<text>S</text>
<text>S</text>
</plain>
<libraries>
<library name="burr-brown">
<description>&lt;b&gt;Burr-Brown Components&lt;/b&gt;&lt;p&gt;
&lt;author&gt;Created by librarian@cadsoft.de&lt;/author&gt;</description>
<packages>
<package name="SO08">
<description>&lt;b&gt;Small Outline Package&lt;/b&gt;</description>
</package>
</packages>
</library>
<library name="STEVES_BU">
<packages>
<package name="0508">
</package>
<package name="1206S">
</package>
<package name="BH9VPC">
</package>
<package name="LOGO_BMP_OP">
</package>
</packages>
</library>
<library name="SparkFun">
<description>&lt;h3&gt;SparkFun Electronics' preferred foot prints&lt;/h3&gt;
We've spent an enormous amount of time creating and checking these footprints and parts. If you enjoy using this library, please buy one of our products at www.sparkfun.com.
&lt;br&gt;&lt;br&gt;
&lt;b&gt;Licensing:&lt;/b&gt; CC v3.0 Share-Alike You are welcome to use this library for commercial purposes. For attribution, we ask that when you begin to sell your device using our footprint, you email us with a link to the product being sold. We want bragging rights that we helped (in a very small part) to create your 8th world wonder. We would like the opportunity to feature your device on our homepage.</description>
<packages>
<package name="MOLEX-1X3-RA">
</package>
<package name="LED-1206">
</package>
<package name="SMA-DIODE">
<description>&lt;B&gt;Diode&lt;/B&gt;&lt;p&gt;
Basic SMA packaged diode. Good for reverse polarization protection. Common part #: MBRA140</description>
</package>
</packages>
</library>
<library name="STEVES_HOME">
<packages>
<package name="ESWITCH200U">
</package>
</packages>
</library>
<library name="adafruit">
<packages>
<package name="SMA90_DIP">
<description>SMA DIP Connector 90° 50 Ohm</description>
</package>
</packages>
</library>
</libraries>
<attributes>
</attributes>
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</variantdefs>
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<element name="C6" library="STEVES_BU" package="1206S" value="1200pF">
<attribute name="NAME"/>
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<element name="R6" library="STEVES_BU" package="1206S" value="300K">
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<element name="C11" library="STEVES_BU" package="1206S" value="1200pF">
<attribute name="NAME"/>
<attribute name="VALUE"/>
</element>
<element name="M2" library="SparkFun" package="MOLEX-1X3-RA" value="">
<attribute name="NAME"/>
<attribute name="VALUE"/>
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<element name="C5" library="STEVES_BU" package="1206S" value="22">
<attribute name="NAME"/>
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<attribute name="NAME"/>
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<attribute name="NAME"/>
<attribute name="VALUE"/>
</element>
<element name="BH1" library="STEVES_BU" package="BH9VPC" value="9VBATBH9VPC">
<attribute name="NAME"/>
<attribute name="VALUE"/>
</element>
<element name="LED1" library="SparkFun" package="LED-1206" value="">
<attribute name="NAME"/>
<attribute name="VALUE"/>
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<attribute name="NAME"/>
<attribute name="VALUE"/>
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<attribute name="NAME"/>
<attribute name="VALUE"/>
</element>
<element name="D1" library="SparkFun" package="SMA-DIODE" value="5.6V">
<attribute name="NAME"/>
<attribute name="VALUE"/>
</element>
<element name="S1" library="STEVES_HOME" package="ESWITCH200U" value="">
<attribute name="NAME"/>
<attribute name="VALUE"/>
</element>
<element name="U$1" library="STEVES_BU" package="LOGO_BMP_OP" value="JFRC-LOGOLOGO_OP"/>
<element name="OUT1" library="adafruit" package="SMA90_DIP" value="">
<attribute name="NAME"/>
<attribute name="VALUE"/>
</element>
<element name="OUT2" library="adafruit" package="SMA90_DIP" value="">
<attribute name="NAME"/>
<attribute name="VALUE"/>
</element>
<element name="/2" library="adafruit" package="SMA90_DIP" value="">
<attribute name="NAME"/>
<attribute name="VALUE"/>
</element>
</elements>
<signals>
<signal name="N$1">
<contactref element="R19" pad="1"/>
<contactref element="C9" pad="1"/>
<contactref element="M1" pad="2"/>
</signal>
<signal name="N$2">
<contactref element="C9" pad="2"/>
<contactref element="R10" pad="1"/>
<contactref element="R11" pad="2"/>
<contactref element="U1" pad="3"/>
</signal>
<signal name="GND">
<contactref element="R11" pad="1"/>
<contactref element="C3" pad="1"/>
<contactref element="C8" pad="1"/>
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<contactref element="BH1" pad="M"/>
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<contactref element="D1" pad="A"/>
<contactref element="/2" pad="GND3"/>
<contactref element="/2" pad="GND4"/>
<contactref element="OUT2" pad="GND4"/>
<contactref element="/2" pad="GND2"/>
<contactref element="OUT2" pad="GND3"/>
<contactref element="/2" pad="GND1"/>
<contactref element="OUT2" pad="GND2"/>
<contactref element="OUT2" pad="GND1"/>
<contactref element="OUT1" pad="GND3"/>
<contactref element="OUT1" pad="GND4"/>
<contactref element="OUT1" pad="GND1"/>
<contactref element="OUT1" pad="GND2"/>
</signal>
<signal name="N$6">
<contactref element="U1" pad="2"/>
<contactref element="R3" pad="2"/>
<contactref element="R5" pad="2"/>
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<signal name="N$7">
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<signal name="N$8">
<contactref element="R5" pad="1"/>
<contactref element="R12" pad="2"/>
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<signal name="N$9">
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<signal name="N$10">
<contactref element="R15" pad="1"/>
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<signal name="N$12">
<contactref element="C8" pad="2"/>
<contactref element="R9" pad="2"/>
</signal>
<signal name="N$13">
<contactref element="U1" pad="6"/>
<contactref element="R9" pad="1"/>
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</signal>
<signal name="+VAMP">
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<signal name="M1">
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<contactref element="U1" pad="7"/>
<contactref element="C6" pad="1"/>
<contactref element="OUT1" pad="ANTENNA"/>
</signal>
<signal name="V+">
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<signal name="N$19">
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<signal name="N$22">
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<signal name="N$20">
<contactref element="BH1" pad="P"/>
<contactref element="S1" pad="5"/>
</signal>
</signals>
</board>
</drawing>
</eagle>
