<?xml version="1.0" encoding="utf-8"?>
<!DOCTYPE eagle SYSTEM "eagle.dtd">
<eagle version="6.6.0">
<drawing>
<board>
<plain>
<text>DIFFERENCE AMPLIFIER A502D</text>
<text>5-68</text>
<hole x="41.91" y="6.35" drill="3.175"/>
<hole x="67.31" y="6.35" drill="3.175"/>
<hole x="12.7" y="53.34" drill="3.175"/>
<hole x="38.1" y="53.34" drill="3.175"/>
</plain>
<libraries>
<library name="dec-con">
<packages>
<package name="EDGE-CON1">
<description>Single-sided Edge Connector</description>
</package>
<package name="3006Y">
<description>Older, larger style of multi-turn potentiometer.</description>
</package>
<package name="SINGLE">
<description>Single-Height DEC board</description>
</package>
</packages>
</library>
<library name="rcl">
<packages>
<package name="0207/10">
<description>&lt;b&gt;RESISTOR&lt;/b&gt;&lt;p&gt;
type 0207, grid 10 mm</description>
</package>
<package name="0207/15">
<description>&lt;b&gt;RESISTOR&lt;/b&gt;&lt;p&gt;
type 0207, grid 15mm</description>
</package>
<package name="C050-025X075">
<description>&lt;b&gt;CAPACITOR&lt;/b&gt;&lt;p&gt;
grid 5 mm, outline 2.5 x 7.5 mm</description>
</package>
</packages>
</library>
<library name="diode">
<packages>
<package name="DO35-10">
<description>&lt;B&gt;DIODE&lt;/B&gt;&lt;p&gt;
diameter 2 mm, horizontal, grid 10.16 mm</description>
</package>
</packages>
</library>
<library name="transistor">
<packages>
<package name="TO5">
<description>&lt;b&gt;TO 5&lt;/b&gt;</description>
</package>
</packages>
</library>
<library name="transistor-pnp">
<packages>
<package name="TO39">
<description>&lt;b&gt;TO-39&lt;/b&gt;</description>
</package>
</packages>
</library>
<library name="wirepad">
<packages>
<package name="2,54/0,8">
<description>&lt;b&gt;THROUGH-HOLE PAD&lt;/b&gt;</description>
</package>
</packages>
</library>
<library name="linear">
<packages>
<package name="TO78">
<description>&lt;b&gt;Metal Can Package&lt;/b&gt;</description>
</package>
</packages>
</library>
</libraries>
<attributes>
</attributes>
<variantdefs>
</variantdefs>
<elements>
<element name="R11" library="rcl" package="0207/10" value="1K"/>
<element name="U$3" library="dec-con" package="EDGE-CON1" value="EDGE-1"/>
<element name="D16" library="diode" package="DO35-10" value="1N645"/>
<element name="Q4" library="transistor" package="TO5" value="2N3009"/>
<element name="R8" library="dec-con" package="3006Y" value="20 WW"/>
<element name="R12" library="rcl" package="0207/10" value="6800 10%"/>
<element name="R3" library="rcl" package="0207/10" value="6800 10%"/>
<element name="Q2" library="transistor-pnp" package="TO39" value="DEC2894"/>
<element name="Q7" library="transistor-pnp" package="TO39" value="DEC2894"/>
<element name="R14" library="rcl" package="0207/10" value="1500"/>
<element name="R15" library="rcl" package="0207/10" value="1500"/>
<element name="R16" library="rcl" package="0207/10" value="1500"/>
<element name="R8-1" library="wirepad" package="2,54/0,8" value=""/>
<element name="R8-2" library="wirepad" package="2,54/0,8" value=""/>
<element name="R8-3" library="wirepad" package="2,54/0,8" value=""/>
<element name="U$2" library="dec-con" package="SINGLE" value="OUTLINE-SINGLE"/>
<element name="D15" library="diode" package="DO35-10" value="1N645"/>
<element name="D17" library="diode" package="DO35-10" value="1N645"/>
<element name="D18" library="diode" package="DO35-10" value="1N645"/>
<element name="R17" library="rcl" package="0207/10" value="1500"/>
<element name="R5" library="dec-con" package="3006Y" value="1000 WW"/>
<element name="C3" library="rcl" package="C050-025X075" value=".01uF"/>
<element name="C2" library="rcl" package="C050-025X075" value=".01uF"/>
<element name="C1" library="rcl" package="C050-025X075" value=".01uF"/>
<element name="R5-1" library="wirepad" package="2,54/0,8" value=""/>
<element name="R5-2" library="wirepad" package="2,54/0,8" value=""/>
<element name="R5-3" library="wirepad" package="2,54/0,8" value=""/>
<element name="D10" library="diode" package="DO35-10" value="1N645"/>
<element name="D11" library="diode" package="DO35-10" value="1N645"/>
<element name="D12" library="diode" package="DO35-10" value="1N645"/>
<element name="R6" library="rcl" package="0207/15" value="237 MF 1/8W"/>
<element name="R10" library="rcl" package="0207/15" value="2740 1%"/>
<element name="R13" library="rcl" package="0207/15" value="681 1%"/>
<element name="R4" library="rcl" package="0207/15" value="2740 1%"/>
<element name="R2" library="rcl" package="0207/10" value="1500"/>
<element name="R1" library="rcl" package="0207/10" value="1500"/>
<element name="R7" library="rcl" package="0207/15" value="9090 1%"/>
<element name="R9" library="rcl" package="0207/15" value="9090 1%"/>
<element name="D3" library="diode" package="DO35-10" value="1N645"/>
<element name="D4" library="diode" package="DO35-10" value="1N645"/>
<element name="D6" library="diode" package="DO35-10" value="1N3606"/>
<element name="D5" library="diode" package="DO35-10" value="1N3606"/>
<element name="D8" library="diode" package="DO35-10" value="1N645"/>
<element name="D9" library="diode" package="DO35-10" value="1N645"/>
<element name="D13" library="diode" package="DO35-10" value="1N3606"/>
<element name="D14" library="diode" package="DO35-10" value="1N3606"/>
<element name="D2" library="diode" package="DO35-10" value="1N3606"/>
<element name="D1" library="diode" package="DO35-10" value="1N3606"/>
<element name="Q5" library="linear" package="TO78" value="SDA-5"/>
<element name="Q1" library="transistor-pnp" package="TO39" value="DEC2894"/>
<element name="Q3" library="transistor-pnp" package="TO39" value="DEC2894"/>
<element name="Q6" library="transistor-pnp" package="TO39" value="DEC2894"/>
<element name="Q8" library="transistor-pnp" package="TO39" value="DEC2894"/>
</elements>
<signals>
<signal name="GND">
<contactref element="U$3" pad="C2"/>
<contactref element="C2" pad="2"/>
<contactref element="C1" pad="2"/>
<contactref element="C3" pad="1"/>
<contactref element="D18" pad="A"/>
<contactref element="R11" pad="1"/>
<contactref element="D14" pad="C"/>
<contactref element="D2" pad="C"/>
<contactref element="Q1" pad="1"/>
<contactref element="Q8" pad="1"/>
</signal>
<signal name="+10V">
<contactref element="U$3" pad="A2"/>
<contactref element="R10" pad="2"/>
<contactref element="R13" pad="2"/>
<contactref element="R4" pad="2"/>
<contactref element="C2" pad="1"/>
</signal>
<signal name="-15V">
<contactref element="U$3" pad="B2"/>
<contactref element="R1" pad="2"/>
<contactref element="R2" pad="2"/>
<contactref element="R5-2" pad="1"/>
<contactref element="R5" pad="2"/>
<contactref element="R5-3" pad="1"/>
<contactref element="R5" pad="3"/>
<contactref element="R3" pad="1"/>
<contactref element="R16" pad="1"/>
<contactref element="R17" pad="1"/>
<contactref element="C3" pad="2"/>
<contactref element="D10" pad="C"/>
<contactref element="R12" pad="2"/>
<contactref element="R14" pad="2"/>
<contactref element="R15" pad="2"/>
</signal>
<signal name="N$1">
<contactref element="U$3" pad="P2"/>
<contactref element="Q5" pad="2"/>
</signal>
<signal name="N$2">
<contactref element="U$3" pad="N2"/>
<contactref element="Q5" pad="5"/>
</signal>
<signal name="N$4">
<contactref element="R9" pad="2"/>
<contactref element="Q5" pad="1"/>
<contactref element="Q6" pad="2"/>
</signal>
<signal name="N$6">
<contactref element="R7" pad="2"/>
<contactref element="Q5" pad="6"/>
<contactref element="Q3" pad="2"/>
</signal>
<signal name="N$9">
<contactref element="Q4" pad="3"/>
<contactref element="R8-2" pad="1"/>
<contactref element="R8" pad="2"/>
</signal>
<signal name="N$5">
<contactref element="Q5" pad="4"/>
<contactref element="Q3" pad="3"/>
<contactref element="R8-1" pad="1"/>
<contactref element="R8" pad="1"/>
</signal>
<signal name="N$10">
<contactref element="R5-1" pad="1"/>
<contactref element="R5" pad="1"/>
<contactref element="R6" pad="1"/>
</signal>
<signal name="N$8">
<contactref element="D18" pad="C"/>
<contactref element="D17" pad="A"/>
</signal>
<signal name="N$11">
<contactref element="D17" pad="C"/>
<contactref element="D16" pad="A"/>
</signal>
<signal name="N$12">
<contactref element="D16" pad="C"/>
<contactref element="D15" pad="A"/>
</signal>
<signal name="-3V">
<contactref element="R17" pad="2"/>
<contactref element="R16" pad="2"/>
<contactref element="D15" pad="C"/>
<contactref element="C1" pad="1"/>
<contactref element="D13" pad="A"/>
<contactref element="D1" pad="A"/>
</signal>
<signal name="N$15">
<contactref element="D2" pad="A"/>
<contactref element="R3" pad="2"/>
<contactref element="Q2" pad="3"/>
<contactref element="Q1" pad="2"/>
</signal>
<signal name="N$7">
<contactref element="R11" pad="2"/>
<contactref element="D12" pad="A"/>
<contactref element="Q4" pad="2"/>
</signal>
<signal name="N$14">
<contactref element="D10" pad="A"/>
<contactref element="D11" pad="C"/>
</signal>
<signal name="N$17">
<contactref element="D11" pad="A"/>
<contactref element="D12" pad="C"/>
</signal>
<signal name="N$18">
<contactref element="R12" pad="1"/>
<contactref element="Q7" pad="3"/>
<contactref element="D14" pad="A"/>
<contactref element="Q8" pad="2"/>
</signal>
<signal name="N$19">
<contactref element="U$3" pad="V2"/>
<contactref element="R14" pad="1"/>
<contactref element="R15" pad="1"/>
<contactref element="D13" pad="C"/>
<contactref element="Q8" pad="3"/>
</signal>
<signal name="N$20">
<contactref element="R4" pad="1"/>
<contactref element="Q2" pad="2"/>
<contactref element="D5" pad="C"/>
<contactref element="D6" pad="A"/>
<contactref element="D4" pad="A"/>
<contactref element="R7" pad="1"/>
</signal>
<signal name="N$21">
<contactref element="Q2" pad="1"/>
<contactref element="R13" pad="1"/>
<contactref element="Q7" pad="1"/>
</signal>
<signal name="N$23">
<contactref element="Q4" pad="1"/>
<contactref element="R6" pad="2"/>
</signal>
<signal name="N$13">
<contactref element="U$3" pad="F2"/>
<contactref element="R2" pad="1"/>
<contactref element="R1" pad="1"/>
<contactref element="D1" pad="C"/>
<contactref element="Q1" pad="3"/>
</signal>
<signal name="N$16">
<contactref element="D9" pad="A"/>
<contactref element="R9" pad="1"/>
<contactref element="Q7" pad="2"/>
<contactref element="R10" pad="1"/>
<contactref element="D5" pad="A"/>
<contactref element="D6" pad="C"/>
</signal>
<signal name="N$24">
<contactref element="D9" pad="C"/>
<contactref element="D8" pad="A"/>
</signal>
<signal name="N$22">
<contactref element="D4" pad="C"/>
<contactref element="D3" pad="A"/>
</signal>
<signal name="N$25">
<contactref element="D3" pad="C"/>
<contactref element="Q3" pad="1"/>
</signal>
<signal name="N$26">
<contactref element="D8" pad="C"/>
<contactref element="Q6" pad="1"/>
</signal>
<signal name="N$3">
<contactref element="R8" pad="3"/>
<contactref element="R8-3" pad="1"/>
<contactref element="Q5" pad="3"/>
<contactref element="Q6" pad="3"/>
</signal>
</signals>
</board>
</drawing>
</eagle>
