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<!doctype html public "-//w3c//dtd html 4.0 transitional//en">
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<html lang="en">
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<head>
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<meta http-equiv=Content-Type content="text/html; charset=utf-8">
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<title>The Class-A Amplifier Site</title>
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<meta name=description
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content="A site primarily dedicated to the John Linsley Hood Class-A amplifier design, originally published in 1969 and later updated in 1996.">
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<meta name=keywords
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content="John,L,Linsley,Hood,Class-A,amplifier,articles,audio,power,supply,design,circuit,schematic,capacitance multiplier,JLH,class A,jean,hiraga,classe a,monster,le,monstre">
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</head>
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<body background="slate.jpg" bgcolor="#E8E8E8" lang=EN-GB link=blue vlink=blue>
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<div class=Section1>
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<p align=right style='margin-top:0cm;margin-right:1.0cm;margin-bottom:0cm;
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margin-left:1.0cm;margin-bottom:.0001pt;text-align:right'><b>The Class-A
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Amplifier Site</b></p>
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<p align=right style='margin-top:0cm;margin-right:1.0cm;margin-bottom:0cm;
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margin-left:1.0cm;margin-bottom:.0001pt;text-align:right'><span
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style='font-size:10.0pt'>This page was last updated on 1 May 2004</span></p>
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<p align=left style='margin-top:0cm;margin-right:1.0cm;margin-bottom:0cm;
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margin-left:1.0cm;margin-bottom:.0001pt;text-align:left'><b><a href="index.htm"
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title=index.htm>[ Back to Main Index ]</a></b></p>
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<p align=left style='margin-top:0cm;margin-right:1.0cm;margin-bottom:0cm;
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margin-left:1.0cm;margin-bottom:.0001pt;text-align:left'> </p>
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<p align=center style='margin-top:0cm;margin-right:1.0cm;margin-bottom:0cm;
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margin-left:1.0cm;margin-bottom:.0001pt;text-align:center'><b> </b></p>
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<p align=center style='margin-top:0cm;margin-right:1.0cm;margin-bottom:0cm;
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margin-left:1.0cm;margin-bottom:.0001pt;text-align:center'><b><span
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style='font-size:20.0pt'>The JLH Class-A Amplifier</span></b></p>
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<p style='margin-top:0cm;margin-right:1.0cm;margin-bottom:0cm;margin-left:1.0cm;
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margin-bottom:.0001pt'><a name=index></a> </p>
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<p style='margin-top:0cm;margin-right:1.0cm;margin-bottom:0cm;margin-left:1.0cm;
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margin-bottom:.0001pt'> </p>
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<table class=MsoNormalTable border=0 cellspacing=0 cellpadding=0 width="100%"
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style='width:100.0%;border-collapse:collapse'>
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<td width="77%" valign=top style='width:77.76%;padding:0cm 0cm 0cm 0cm'>
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<p style='margin-top:0cm;margin-right:1.0cm;margin-bottom:0cm;margin-left:
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1.0cm;margin-bottom:.0001pt'><b><span style='font-size:16.0pt'>Index</span></b></p>
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<p align=left style='margin-top:0cm;margin-right:1.0cm;margin-bottom:0cm;
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margin-left:42.55pt;margin-bottom:.0001pt;text-align:left'><b> </b></p>
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</td>
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<td width="22%" valign=top style='width:22.24%;padding:0cm 1.0cm 0cm 0cm'>
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<p align=right style='margin-top:0cm;margin-right:5.65pt;margin-bottom:0cm;
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margin-left:5.65pt;margin-bottom:.0001pt;text-align:right'><u><span
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style='font-size:10.0pt'>Last Updated</span></u></p>
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</td>
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<td width="77%" valign=top style='width:77.76%;padding:0cm 0cm 0cm 0cm'>
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<p align=left style='margin-top:0cm;margin-right:1.0cm;margin-bottom:0cm;
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margin-left:1.0cm;margin-bottom:.0001pt;text-align:left'><b>The JLH Class-A
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Articles</b></p>
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<p align=left style='margin-top:0cm;margin-right:1.0cm;margin-bottom:0cm;
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margin-left:1.0cm;margin-bottom:.0001pt;text-align:left'> </p>
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</td>
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<td width="22%" valign=top style='width:22.24%;padding:0cm 1.0cm 0cm 0cm'>
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<p align=right style='margin-top:0cm;margin-right:5.65pt;margin-bottom:0cm;
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margin-left:5.65pt;margin-bottom:.0001pt;text-align:right'><span
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style='font-size:10.0pt'> </span></p>
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</td>
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<tr>
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<td width="77%" valign=top style='width:77.76%;padding:0cm 0cm 0cm 0cm'>
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<p align=left style='margin-top:0cm;margin-right:1.0cm;margin-bottom:0cm;
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margin-left:42.55pt;margin-bottom:.0001pt;text-align:left'><a
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href="jlh1969.pdf" title=jlh1969.pdf><b>The Original Article - Wireless World
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April 1969</b></a></p>
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<p align=left style='margin-top:0cm;margin-right:1.0cm;margin-bottom:0cm;
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margin-left:42.55pt;margin-bottom:.0001pt;text-align:left'> </p>
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<td width="22%" valign=top style='width:22.24%;padding:0cm 1.0cm 0cm 0cm'>
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<p align=right style='margin-top:0cm;margin-right:5.65pt;margin-bottom:0cm;
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margin-left:5.65pt;margin-bottom:.0001pt;text-align:right'><span
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style='font-size:10.0pt'><a href="jlh1969.pdf" title=jlh1969.pdf><span
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style='font-size:8.0pt;color:windowtext;text-decoration:none'>184kB</span><span
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style='color:windowtext;text-decoration:none'> <img border=0 width=28
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height=31 src="pdf.gif"></span></a></span></p>
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</td>
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<td width="77%" valign=top style='width:77.76%;padding:0cm 0cm 0cm 0cm'>
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<p align=left style='margin-top:0cm;margin-right:1.0cm;margin-bottom:0cm;
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margin-left:2.0cm;margin-bottom:.0001pt;text-align:left'><b><a
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href="jlh1969-1.pdf" title=jlh1969-1.pdf>Oscilloscope Traces &
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Photographs from the 1969 Article</a></b></p>
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<p align=left style='margin-top:0cm;margin-right:1.0cm;margin-bottom:0cm;
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margin-left:42.55pt;margin-bottom:.0001pt;text-align:left'> </p>
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<td width="22%" valign=top style='width:22.24%;padding:0cm 1.0cm 0cm 0cm'>
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<p align=right style='margin-top:0cm;margin-right:5.65pt;margin-bottom:0cm;
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margin-left:5.65pt;margin-bottom:.0001pt;text-align:right'><span
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style='font-size:10.0pt'><a href="jlh1969-1.pdf" title=jlh1969-1.pdf><span
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style='font-size:8.0pt;color:windowtext;text-decoration:none'>538kB</span><span
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style='color:windowtext;text-decoration:none'> <img border=0 width=28
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height=31 src="pdf.gif"></span></a></span></p>
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</td>
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</tr>
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<tr>
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<td width="77%" valign=top style='width:77.76%;padding:0cm 0cm 0cm 0cm'>
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<p align=left style='margin-top:0cm;margin-right:1.0cm;margin-bottom:0cm;
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margin-left:42.55pt;margin-bottom:.0001pt;text-align:left'><a
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href="jlh1969letter.pdf" title=jlh1969letter.pdf><b>Letter to the editor -
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Wireless World October 1969</b></a></p>
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<p align=left style='margin-top:0cm;margin-right:1.0cm;margin-bottom:0cm;
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margin-left:42.55pt;margin-bottom:.0001pt;text-align:left'> </p>
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</td>
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<td width="22%" valign=top style='width:22.24%;padding:0cm 1.0cm 0cm 0cm'>
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<p align=right style='margin-top:0cm;margin-right:5.65pt;margin-bottom:0cm;
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margin-left:5.65pt;margin-bottom:.0001pt;text-align:right'><span
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style='font-size:10.0pt'><a href="jlh1969letter.pdf" title=jlh1969letter.pdf><span
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style='font-size:8.0pt;color:windowtext;text-decoration:none'>39kB</span><span
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style='color:windowtext;text-decoration:none'> <img border=0 width=28
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height=31 src="pdf.gif"></span></a></span></p>
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</td>
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<tr>
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<td width="77%" valign=top style='width:77.76%;padding:0cm 0cm 0cm 0cm'>
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<p align=left style='margin-top:0cm;margin-right:1.0cm;margin-bottom:0cm;
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margin-left:42.55pt;margin-bottom:.0001pt;text-align:left'><a
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href="jlh1970.pdf" title=jlh1970.pdf><b>The Postscript - Wireless World
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December 1970</b></a></p>
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<p align=left style='margin-top:0cm;margin-right:1.0cm;margin-bottom:0cm;
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margin-left:42.55pt;margin-bottom:.0001pt;text-align:left'> </p>
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</td>
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<td width="22%" valign=top style='width:22.24%;padding:0cm 1.0cm 0cm 0cm'>
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<p align=right style='margin-top:0cm;margin-right:5.65pt;margin-bottom:0cm;
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margin-left:5.65pt;margin-bottom:.0001pt;text-align:right'><span
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style='font-size:10.0pt'><a href="jlh1970.pdf" title=jlh1970.pdf><span
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style='font-size:8.0pt;color:windowtext;text-decoration:none'>122kB</span><span
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style='color:windowtext;text-decoration:none'> <img border=0 width=28
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height=31 src="pdf.gif"></span></a></span></p>
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</td>
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</tr>
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<tr>
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<td width="77%" valign=top style='width:77.76%;padding:0cm 0cm 0cm 0cm'>
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<p align=left style='margin-top:0cm;margin-right:1.0cm;margin-bottom:0cm;
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margin-left:42.55pt;margin-bottom:.0001pt;text-align:left'><a
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href="jlh1996.pdf" title=jlh1996.pdf><b>The Update - Electronics World
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September 1996</b></a></p>
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<p align=left style='margin-top:0cm;margin-right:1.0cm;margin-bottom:0cm;
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margin-left:42.55pt;margin-bottom:.0001pt;text-align:left'> </p>
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</td>
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<td width="22%" valign=top style='width:22.24%;padding:0cm 1.0cm 0cm 0cm'>
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<p align=right style='margin-top:0cm;margin-right:5.65pt;margin-bottom:0cm;
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margin-left:5.65pt;margin-bottom:.0001pt;text-align:right'><span
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style='font-size:10.0pt'><a href="jlh1996.pdf" title=jlh1996.pdf><span
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style='font-size:8.0pt;color:windowtext;text-decoration:none'>142kB</span><span
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style='color:windowtext;text-decoration:none'> <img border=0 width=28
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height=31 src="pdf.gif"></span></a></span></p>
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</td>
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</tr>
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<tr>
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<td width="77%" valign=top style='width:77.76%;padding:0cm 0cm 0cm 0cm'>
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<p align=left style='margin-top:0cm;margin-right:1.0cm;margin-bottom:0cm;
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margin-left:42.55pt;margin-bottom:.0001pt;text-align:left'><b><a
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href="jlh2000.pdf" title=jlh2000.pdf>A Little Reminiscing - Electronics World
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May 2000</a></b></p>
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<p align=left style='margin-top:0cm;margin-right:1.0cm;margin-bottom:0cm;
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margin-left:42.55pt;margin-bottom:.0001pt;text-align:left'> </p>
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</td>
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<td width="22%" valign=top style='width:22.24%;padding:0cm 1.0cm 0cm 0cm'>
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<p align=right style='margin-top:0cm;margin-right:5.65pt;margin-bottom:0cm;
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margin-left:5.65pt;margin-bottom:.0001pt;text-align:right'><span
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style='font-size:8.0pt'>16kB</span><span style='font-size:10.0pt'> <a
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href="jlh2000.pdf" title=jlh2000.pdf><span style='color:windowtext;
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text-decoration:none'><img border=0 width=28 height=31 src="pdf.gif"></span></a></span></p>
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</td>
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</tr>
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<tr>
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<td width="77%" valign=top style='width:77.76%;padding:0cm 0cm 0cm 0cm'>
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<p align=left style='margin-top:0cm;margin-right:1.0cm;margin-bottom:0cm;
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margin-left:1.0cm;margin-bottom:.0001pt;text-align:left'><b>Power Supplies
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for the JLH Class-A</b></p>
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<p align=left style='margin-top:0cm;margin-right:1.0cm;margin-bottom:0cm;
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margin-left:1.0cm;margin-bottom:.0001pt;text-align:left'> </p>
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</td>
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<td width="22%" valign=top style='width:22.24%;padding:0cm 1.0cm 0cm 0cm'>
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<p align=right style='margin-top:0cm;margin-right:5.65pt;margin-bottom:0cm;
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margin-left:5.65pt;margin-bottom:.0001pt;text-align:right'><span
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style='font-size:10.0pt'> </span></p>
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</td>
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</tr>
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<tr>
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<td width="77%" valign=top style='width:77.76%;padding:0cm 0cm 0cm 0cm'>
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<p align=left style='margin-top:0cm;margin-right:1.0cm;margin-bottom:0cm;
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margin-left:42.55pt;margin-bottom:.0001pt;text-align:left'><a
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href="jlhnewps.htm" title=jlhnewps.htm><b>An updated, regulated power supply
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for the 1996 version</b></a></p>
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<p align=left style='margin-top:0cm;margin-right:1.0cm;margin-bottom:0cm;
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margin-left:42.55pt;margin-bottom:.0001pt;text-align:left'> </p>
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</td>
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<td width="22%" valign=top style='width:22.24%;padding:0cm 1.0cm 0cm 0cm'>
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<p align=right style='margin-top:0cm;margin-right:5.65pt;margin-bottom:0cm;
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margin-left:5.65pt;margin-bottom:.0001pt;text-align:right'><span
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style='font-size:10.0pt'>1 May 2004</span></p>
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</td>
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</tr>
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<tr>
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<td width="77%" valign=top style='width:77.76%;padding:0cm 0cm 0cm 0cm'>
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<p align=left style='margin-top:0cm;margin-right:1.0cm;margin-bottom:0cm;
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margin-left:42.55pt;margin-bottom:.0001pt;text-align:left'><b><a
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href="jlhlm3x7cb.htm" title=jlhlm3x7cb.htm>A Current Boosted LM317/LM337
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Regulator</a></b></p>
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<p align=left style='margin-top:0cm;margin-right:1.0cm;margin-bottom:0cm;
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margin-left:42.55pt;margin-bottom:.0001pt;text-align:left'> </p>
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</td>
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<td width="22%" valign=top style='width:22.24%;padding:0cm 1.0cm 0cm 0cm'>
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<p align=right style='margin-top:0cm;margin-right:5.65pt;margin-bottom:0cm;
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margin-left:5.65pt;margin-bottom:.0001pt;text-align:right'><span
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style='font-size:10.0pt'>14 October 2001</span></p>
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</td>
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</tr>
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<td width="77%" valign=top style='width:77.76%;padding:0cm 0cm 0cm 0cm'>
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<p align=left style='margin-top:0cm;margin-right:1.0cm;margin-bottom:0cm;
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margin-left:42.55pt;margin-bottom:.0001pt;text-align:left'><a
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href="jlhcapmult.htm" title=jlhcapmult.htm><b>The Capacitance Multiplier</b></a></p>
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<p align=left style='margin-top:0cm;margin-right:1.0cm;margin-bottom:0cm;
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margin-left:42.55pt;margin-bottom:.0001pt;text-align:left'> </p>
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</td>
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<td width="22%" valign=top style='width:22.24%;padding:0cm 1.0cm 0cm 0cm'>
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<p align=right style='margin-top:0cm;margin-right:5.65pt;margin-bottom:0cm;
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margin-left:5.65pt;margin-bottom:.0001pt;text-align:right'><span
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style='font-size:10.0pt'>17 May 2001</span></p>
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</td>
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</tr>
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<td width="77%" valign=top style='width:77.76%;padding:0cm 0cm 0cm 0cm'>
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<p align=left style='margin-top:0cm;margin-right:1.0cm;margin-bottom:0cm;
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margin-left:42.55pt;margin-bottom:.0001pt;text-align:left'><b><a
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href="jlhvoltreg.htm" title=jlhvoltreg.htm>A Simple Voltage Regulator</a></b></p>
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<p align=left style='margin-top:0cm;margin-right:1.0cm;margin-bottom:0cm;
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margin-left:42.55pt;margin-bottom:.0001pt;text-align:left'><span
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style='font-size:11.0pt'> </span></p>
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</td>
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<td width="22%" valign=top style='width:22.24%;padding:0cm 1.0cm 0cm 0cm'>
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<p align=right style='margin-top:0cm;margin-right:5.65pt;margin-bottom:0cm;
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margin-left:5.65pt;margin-bottom:.0001pt;text-align:right'><span
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style='font-size:10.0pt'>17 May 2001</span></p>
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</td>
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</tr>
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<tr>
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<td width="77%" valign=top style='width:77.76%;padding:0cm 0cm 0cm 0cm'>
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<p align=left style='margin-top:0cm;margin-right:1.0cm;margin-bottom:0cm;
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margin-left:1.0cm;margin-bottom:.0001pt;text-align:left'><b>Additional
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Information for the JLH Class-A</b></p>
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<p align=left style='margin-top:0cm;margin-right:1.0cm;margin-bottom:0cm;
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margin-left:1.0cm;margin-bottom:.0001pt;text-align:left'><span
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style='font-size:11.0pt'> </span></p>
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</td>
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<td width="22%" valign=top style='width:22.24%;padding:0cm 1.0cm 0cm 0cm'>
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<p align=right style='margin-top:0cm;margin-right:5.65pt;margin-bottom:0cm;
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margin-left:5.65pt;margin-bottom:.0001pt;text-align:right'><span
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style='font-size:10.0pt'> </span></p>
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</td>
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<tr>
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<td width="77%" valign=top style='width:77.76%;padding:0cm 0cm 0cm 0cm'>
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<p align=left style='margin-top:0cm;margin-right:1.0cm;margin-bottom:0cm;
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margin-left:42.55pt;margin-bottom:.0001pt;text-align:left'><b><a
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href="jlhoutput.pdf" title=jlhoutput.pdf>JLH Class-A - Single-ended or
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Push-pull?</a></b></p>
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<p align=left style='margin-top:0cm;margin-right:1.0cm;margin-bottom:0cm;
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margin-left:42.55pt;margin-bottom:.0001pt;text-align:left'><b> </b></p>
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<td width="22%" valign=top style='width:22.24%;padding:0cm 1.0cm 0cm 0cm'>
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<p align=right style='margin-top:0cm;margin-right:5.65pt;margin-bottom:0cm;
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margin-left:5.65pt;margin-bottom:.0001pt;text-align:right'><span
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style='font-size:8.0pt;color:black'>23kB </span><span style='font-size:
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10.0pt;color:black'><a href="jlhoutput.pdf" title=jlhoutput.pdf><span
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style='color:black;text-decoration:none'><img border=0 width=28 height=31
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src="pdf.gif"></span></a></span></p>
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</td>
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</tr>
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<tr>
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<td width="77%" valign=top style='width:77.76%;padding:0cm 0cm 0cm 0cm'>
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<p align=left style='margin-top:0cm;margin-right:1.0cm;margin-bottom:0cm;
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margin-left:42.55pt;margin-bottom:.0001pt;text-align:left'><b><a
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href="jlhupdate.htm" title=jlhupdate.htm>JLH Class-A Update</a></b></p>
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<p align=left style='margin-top:0cm;margin-right:1.0cm;margin-bottom:0cm;
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margin-left:42.55pt;margin-bottom:.0001pt;text-align:left'><b> </b></p>
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</td>
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<td width="22%" valign=top style='width:22.24%;padding:0cm 1.0cm 0cm 0cm'>
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<p align=right style='margin-top:0cm;margin-right:5.65pt;margin-bottom:0cm;
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margin-left:5.65pt;margin-bottom:.0001pt;text-align:right'><span
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style='font-size:10.0pt;color:black'>17 August 2003</span></p>
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<p align=right style='margin-top:0cm;margin-right:5.65pt;margin-bottom:0cm;
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margin-left:5.65pt;margin-bottom:.0001pt;text-align:right'><span
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style='font-size:10.0pt;color:black'> </span></p>
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</td>
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</tr>
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<tr>
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<td width="77%" valign=top style='width:77.76%;padding:0cm 0cm 0cm 0cm'>
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<p align=left style='margin-top:0cm;margin-right:1.0cm;margin-bottom:0cm;
|
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margin-left:42.55pt;margin-bottom:.0001pt;text-align:left'><b><a
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href="jlhesl.htm" title=jlhesl.htm>A JLH Class-A for the Quad ESL57</a></b></p>
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<p align=left style='margin-top:0cm;margin-right:1.0cm;margin-bottom:0cm;
|
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margin-left:42.55pt;margin-bottom:.0001pt;text-align:left'> </p>
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</td>
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<td width="22%" valign=top style='width:22.24%;padding:0cm 1.0cm 0cm 0cm'>
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<p align=right style='margin-top:0cm;margin-right:5.65pt;margin-bottom:0cm;
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margin-left:5.65pt;margin-bottom:.0001pt;text-align:right'><span
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style='font-size:10.0pt'>4 February 2002</span></p>
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</td>
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</tr>
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<tr>
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<td width="77%" valign=top style='width:77.76%;padding:0cm 0cm 0cm 0cm'>
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<p align=left style='margin-top:0cm;margin-right:1.0cm;margin-bottom:0cm;
|
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margin-left:42.55pt;margin-bottom:.0001pt;text-align:left'><a
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href="jlhnotes.htm" title=jlhnotes.htm><b>Design Notes</b></a></p>
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<p align=left style='margin-top:0cm;margin-right:1.0cm;margin-bottom:0cm;
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margin-left:42.55pt;margin-bottom:.0001pt;text-align:left'> </p>
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</td>
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<td width="22%" valign=top style='width:22.24%;padding:0cm 1.0cm 0cm 0cm'>
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<p align=right style='margin-top:0cm;margin-right:5.65pt;margin-bottom:0cm;
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margin-left:5.65pt;margin-bottom:.0001pt;text-align:right'><span
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style='font-size:10.0pt'>27 November 2002</span></p>
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</td>
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</tr>
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<tr>
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<td width="77%" valign=top style='width:77.76%;padding:0cm 0cm 0cm 0cm'>
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<p align=left style='margin-top:0cm;margin-right:1.0cm;margin-bottom:0cm;
|
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margin-left:42.55pt;margin-bottom:.0001pt;text-align:left'><a
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href="jlhtrans.htm" title=jlhtrans.htm><b>Transistor Substitutes</b></a></p>
|
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<p align=left style='margin-top:0cm;margin-right:1.0cm;margin-bottom:0cm;
|
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margin-left:42.55pt;margin-bottom:.0001pt;text-align:left'> </p>
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</td>
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<td width="22%" valign=top style='width:22.24%;padding:0cm 1.0cm 0cm 0cm'>
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<p align=right style='margin-top:0cm;margin-right:5.65pt;margin-bottom:0cm;
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margin-left:5.65pt;margin-bottom:.0001pt;text-align:right'><span
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style='font-size:10.0pt'>7 November 2001</span></p>
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</td>
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</tr>
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<tr>
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<td width="77%" valign=top style='width:77.76%;padding:0cm 0cm 0cm 0cm'>
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<p align=left style='margin-top:0cm;margin-right:1.0cm;margin-bottom:0cm;
|
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margin-left:42.55pt;margin-bottom:.0001pt;text-align:left'><a
|
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href="jlhdcvolts.htm" title=jlhdcvolts.htm><b>D C Voltages (for testing /
|
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|
fault-finding)</b></a></p>
|
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<p align=left style='margin-top:0cm;margin-right:1.0cm;margin-bottom:0cm;
|
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margin-left:42.55pt;margin-bottom:.0001pt;text-align:left'> </p>
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</td>
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<td width="22%" valign=top style='width:22.24%;padding:0cm 1.0cm 0cm 0cm'>
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<p align=right style='margin-top:0cm;margin-right:5.65pt;margin-bottom:0cm;
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margin-left:5.65pt;margin-bottom:.0001pt;text-align:right'><span
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style='font-size:10.0pt'>7 May 2001</span></p>
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</td>
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</tr>
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<tr>
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<td width="77%" valign=top style='width:77.76%;padding:0cm 0cm 0cm 0cm'>
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<p align=left style='margin-top:0cm;margin-right:1.0cm;margin-bottom:0cm;
|
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margin-left:42.55pt;margin-bottom:.0001pt;text-align:left'><a
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href="jlhearthing.htm" title=jlhearthing.htm><b>Earthing</b></a></p>
|
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<p align=left style='margin-top:0cm;margin-right:1.0cm;margin-bottom:0cm;
|
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margin-left:42.55pt;margin-bottom:.0001pt;text-align:left'> </p>
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</td>
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<td width="22%" valign=top style='width:22.24%;padding:0cm 1.0cm 0cm 0cm'>
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<p align=right style='margin-top:0cm;margin-right:5.65pt;margin-bottom:0cm;
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margin-left:5.65pt;margin-bottom:.0001pt;text-align:right'><span
|
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style='font-size:10.0pt'>7 May 2001</span></p>
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</td>
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</tr>
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<td width="77%" valign=top style='width:77.76%;padding:0cm 0cm 0cm 0cm'>
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<p align=left style='margin-top:0cm;margin-right:1.0cm;margin-bottom:0cm;
|
|
|
margin-left:42.55pt;margin-bottom:.0001pt;text-align:left'><b><a
|
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|
href="Geoff-Moss-JLH.zip" title=Geoff-Moss-JLH.zip>Geoff Moss Construction Information</a></b></p>
|
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<p align=left style='margin-top:0cm;margin-right:1.0cm;margin-bottom:0cm;
|
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margin-left:42.55pt;margin-bottom:.0001pt;text-align:left'> </p>
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</td>
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<td width="22%" valign=top style='width:22.24%;padding:0cm 1.0cm 0cm 0cm'>
|
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<p align=right style='margin-top:0cm;margin-right:5.65pt;margin-bottom:0cm;
|
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margin-left:5.65pt;margin-bottom:.0001pt;text-align:right'><span
|
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|
style='font-size:10.0pt'>293k Zip File<br />9 March 2021</span></p>
|
|
|
</td>
|
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</tr>
|
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<tr>
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<td width="77%" valign=top style='width:77.76%;padding:0cm 0cm 0cm 0cm'>
|
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<p align=left style='margin-top:0cm;margin-right:1.0cm;margin-bottom:0cm;
|
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|
margin-left:42.55pt;margin-bottom:.0001pt;text-align:left'><b><a
|
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|
href="jlhsound.htm" title=jlhsound.htm>Constructors' Comments – Sound Quality</a></b></p>
|
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|
<p align=left style='margin-top:0cm;margin-right:1.0cm;margin-bottom:0cm;
|
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margin-left:42.55pt;margin-bottom:.0001pt;text-align:left'> </p>
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</td>
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<td width="22%" valign=top style='width:22.24%;padding:0cm 1.0cm 0cm 0cm'>
|
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<p align=right style='margin-top:0cm;margin-right:5.65pt;margin-bottom:0cm;
|
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margin-left:5.65pt;margin-bottom:.0001pt;text-align:right'><span
|
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style='font-size:10.0pt'>5 December 2001</span></p>
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</td>
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</tr>
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<tr>
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<td width="77%" valign=top style='width:77.76%;padding:0cm 0cm 0cm 0cm'>
|
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<p align=left style='margin-top:0cm;margin-right:1.0cm;margin-bottom:0cm;
|
|
|
margin-left:1.0cm;margin-bottom:.0001pt;text-align:left'><b>Contributed
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Articles</b></p>
|
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|
<p align=left style='margin-top:0cm;margin-right:1.0cm;margin-bottom:0cm;
|
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margin-left:1.0cm;margin-bottom:.0001pt;text-align:left'><b> </b></p>
|
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</td>
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<td width="22%" valign=top style='width:22.24%;padding:0cm 1.0cm 0cm 0cm'>
|
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<p align=right style='margin-top:0cm;margin-right:5.65pt;margin-bottom:0cm;
|
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margin-left:5.65pt;margin-bottom:.0001pt;text-align:right'><span
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style='font-size:10.0pt'> </span></p>
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</td>
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</tr>
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<tr>
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<td width="77%" valign=top style='width:77.76%;padding:0cm 0cm 0cm 0cm'>
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<p align=left style='margin-top:0cm;margin-right:1.0cm;margin-bottom:0cm;
|
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|
margin-left:42.55pt;margin-bottom:.0001pt;text-align:left'><b><a
|
|
|
href="jlhrvs.htm" title=jlhrvs.htm>A Dutch journey in JLH-land</a> </b>(By
|
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|
Rudy van Stratum)</p>
|
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|
<p align=left style='margin-top:0cm;margin-right:1.0cm;margin-bottom:0cm;
|
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margin-left:42.55pt;margin-bottom:.0001pt;text-align:left'><b> </b></p>
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</td>
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<td width="22%" valign=top style='width:22.24%;padding:0cm 1.0cm 0cm 0cm'>
|
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<p align=right style='margin-top:0cm;margin-right:5.65pt;margin-bottom:0cm;
|
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margin-left:5.65pt;margin-bottom:.0001pt;text-align:right'><span
|
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|
style='font-size:10.0pt'>19 August 2001</span></p>
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</td>
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</tr>
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</table>
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|
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<p class=MsoNormal style='margin-top:0cm;margin-right:1.0cm;margin-bottom:0cm;
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margin-left:1.0cm;margin-bottom:.0001pt'><span style='font-size:12.0pt'> </span></p>
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<p style='margin-top:0cm;margin-right:1.0cm;margin-bottom:0cm;margin-left:1.0cm;
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margin-bottom:.0001pt'><b><a href="index.htm" title=index.htm>[ Back to Main
|
|
|
Index ]</a></b></p>
|
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|
<p style='margin-top:0cm;margin-right:1.0cm;margin-bottom:0cm;margin-left:1.0cm;
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margin-bottom:.0001pt'> </p>
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<div style='margin-left:1.0cm;margin-right:1.0cm'>
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<div class=MsoNormal><span style='font-size:12.0pt'> </span>
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<hr size=3 width="100%" align=left>
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</div>
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</div>
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<p align=left style='margin-top:0cm;margin-right:1.0cm;margin-bottom:0cm;
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margin-left:1.0cm;margin-bottom:.0001pt;text-align:left'><b><span
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style='font-size:8.0pt'>HISTORY:</span></b><span style='font-size:8.0pt'>
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Page created 04/04/2004 </span></p>
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<p align=left style='margin-top:0cm;margin-right:1.0cm;margin-bottom:0cm;
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margin-left:1.0cm;margin-bottom:.0001pt;text-align:left'><span
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style='font-size:8.0pt'>04/05/2001 The April 1969 Original page, photographs
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and oscilloscope traces moved to separate pages</span></p>
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<p align=left style='margin-top:0cm;margin-right:1.0cm;margin-bottom:0cm;
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margin-left:1.0cm;margin-bottom:.0001pt;text-align:left'><span
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style='font-size:8.0pt'>07/05/2001 Simulation Results, Earthing and DC Voltages
|
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|
pages added</span></p>
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<p align=left style='margin-top:0cm;margin-right:1.0cm;margin-bottom:0cm;
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margin-left:1.0cm;margin-bottom:.0001pt;text-align:left'><span
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|
style='font-size:8.0pt'>10/05/2001 Quiescent Current and DC Offset page added.
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|
Link added to Design Notes page</span></p>
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<p align=left style='margin-top:0cm;margin-right:1.0cm;margin-bottom:0cm;
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margin-left:1.0cm;margin-bottom:.0001pt;text-align:left'><span
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style='font-size:8.0pt'>11/05/2001 Comparison of Versions and Transistors moved
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to separate page. Simulation Results re-titled Simulations</span></p>
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<p align=left style='margin-top:0cm;margin-right:1.0cm;margin-bottom:0cm;
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margin-left:1.0cm;margin-bottom:.0001pt;text-align:left'><span
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style='font-size:8.0pt'>13/05/2001 A Simple Voltage Regulator page added</span></p>
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<p align=left style='margin-top:0cm;margin-right:1.0cm;margin-bottom:0cm;
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margin-left:1.0cm;margin-bottom:.0001pt;text-align:left'><span
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style='font-size:8.0pt'>16/05/2001 Diagram and equation corrected in A Simple
|
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|
Voltage Regulator page</span></p>
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<p align=left style='margin-top:0cm;margin-right:1.0cm;margin-bottom:0cm;
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margin-left:1.0cm;margin-bottom:.0001pt;text-align:left'><span
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style='font-size:8.0pt'>
|
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Diagrams in Updated Regulated Supply and Design Notes pages redrawn</span></p>
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<p align=left style='margin-top:0cm;margin-right:1.0cm;margin-bottom:0cm;
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margin-left:1.0cm;margin-bottom:.0001pt;text-align:left'><span
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style='font-size:8.0pt'>
|
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Diagrams corrected in The Capacitance Multiplier page and simple capacitance
|
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|
multiplier circuit added</span></p>
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<p align=left style='margin-top:0cm;margin-right:1.0cm;margin-bottom:0cm;
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margin-left:1.0cm;margin-bottom:.0001pt;text-align:left'><span
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style='font-size:8.0pt'>17/05/2001 Recommended capacitor sizes updated in The
|
|
|
Capacitance Multiplier page</span></p>
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<p align=left style='margin-top:0cm;margin-right:1.0cm;margin-bottom:0cm;
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margin-left:1.0cm;margin-bottom:.0001pt;text-align:left'><span
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style='font-size:8.0pt'>
|
|
|
Minor text changes and second voltage equation added to A Simple Voltage
|
|
|
Regulator page</span></p>
|
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|
<p align=left style='margin-top:0cm;margin-right:1.0cm;margin-bottom:0cm;
|
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|
margin-left:1.0cm;margin-bottom:.0001pt;text-align:left'><span
|
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|
style='font-size:8.0pt'>19/05/2001 Comparison of Versions and Transistors page
|
|
|
temporarily withdrawn</span></p>
|
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|
<p align=left style='margin-top:0cm;margin-right:1.0cm;margin-bottom:0cm;
|
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|
margin-left:1.0cm;margin-bottom:.0001pt;text-align:left'><span
|
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|
style='font-size:8.0pt'>20/05/2001 Comparison of Versions and Transistors page
|
|
|
reissued</span></p>
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|
<p align=left style='margin-top:0cm;margin-right:1.0cm;margin-bottom:0cm;
|
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|
margin-left:1.0cm;margin-bottom:.0001pt;text-align:left'><span
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|
|
style='font-size:8.0pt'>22/05/2001 2N3019 added to Transistor Substitutes page</span></p>
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|
<p align=left style='margin-top:0cm;margin-right:1.0cm;margin-bottom:0cm;
|
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margin-left:1.0cm;margin-bottom:.0001pt;text-align:left'><span
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|
|
style='font-size:8.0pt'>26/05/2001 New link added to JLH Links page</span></p>
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|
<p align=left style='margin-top:0cm;margin-right:1.0cm;margin-bottom:0cm;
|
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|
margin-left:1.0cm;margin-bottom:.0001pt;text-align:left'><span
|
|
|
style='font-size:8.0pt'>27/05/2001 Para 2 and simulation results for Tr5 added
|
|
|
to Comparison of Versions and Transistors page</span></p>
|
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|
|
<p align=left style='margin-top:0cm;margin-right:1.0cm;margin-bottom:0cm;
|
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margin-left:1.0cm;margin-bottom:.0001pt;text-align:left'><span
|
|
|
style='font-size:8.0pt'>
|
|
|
Reference to BD139-16 added to Transistor Substitutes page</span></p>
|
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|
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|
<p align=left style='margin-top:0cm;margin-right:1.0cm;margin-bottom:0cm;
|
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|
margin-left:1.0cm;margin-bottom:.0001pt;text-align:left'><span
|
|
|
style='font-size:8.0pt'>05/06/2001 Design Notes page, polarity of C3 in Figure
|
|
|
2 corrected</span></p>
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<p align=left style='margin-top:0cm;margin-right:1.0cm;margin-bottom:0cm;
|
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margin-left:1.0cm;margin-bottom:.0001pt;text-align:left'><span
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style='font-size:8.0pt'>24/06/2001 Constructors’ Comments – Sound Quality page
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added</span></p>
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<p align=left style='margin-top:0cm;margin-right:1.0cm;margin-bottom:0cm;
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margin-left:1.0cm;margin-bottom:.0001pt;text-align:left'><span
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style='font-size:8.0pt'>08/07/2001 Constructors’ Comments – Sound Quality page
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updated</span></p>
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<p align=left style='margin-top:0cm;margin-right:1.0cm;margin-bottom:0cm;
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margin-left:1.0cm;margin-bottom:.0001pt;text-align:left'><span
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style='font-size:8.0pt'>24/07/2001 Constructors’ Comments – Sound Quality page
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updated</span></p>
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<p align=left style='margin-top:0cm;margin-right:1.0cm;margin-bottom:0cm;
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margin-left:1.0cm;margin-bottom:.0001pt;text-align:left'><span
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style='font-size:8.0pt'>01/08/2001 New link added to JLH Links page</span></p>
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<p align=left style='margin-top:0cm;margin-right:1.0cm;margin-bottom:0cm;
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margin-left:1.0cm;margin-bottom:.0001pt;text-align:left'><span
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style='font-size:8.0pt'>05/08/2001 Design Notes and Constructors’ Comments –
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Sound Quality pages updated</span></p>
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<p align=left style='margin-top:0cm;margin-right:1.0cm;margin-bottom:0cm;
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margin-left:1.0cm;margin-bottom:.0001pt;text-align:left'><span
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style='font-size:8.0pt'>14/08/2001 JLH new power supply page updated</span></p>
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<p align=left style='margin-top:0cm;margin-right:1.0cm;margin-bottom:0cm;
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margin-left:1.0cm;margin-bottom:.0001pt;text-align:left'><span
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style='font-size:8.0pt'>18/08/2001 Constructors’ Comments – Sound Quality page
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updated</span></p>
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<p align=left style='margin-top:0cm;margin-right:1.0cm;margin-bottom:0cm;
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margin-left:1.0cm;margin-bottom:.0001pt;text-align:left'><span
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style='font-size:8.0pt'>19/08/2001 Rudy van Stratum’s article added</span></p>
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<p align=left style='margin-top:0cm;margin-right:1.0cm;margin-bottom:0cm;
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margin-left:1.0cm;margin-bottom:.0001pt;text-align:left'><span
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style='font-size:8.0pt'>09/09/2001 Caution regarding high ft output transistors
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added to Transistor Substitutes page</span></p>
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<p align=left style='margin-top:0cm;margin-right:1.0cm;margin-bottom:0cm;
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margin-left:1.0cm;margin-bottom:.0001pt;text-align:left'><span
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style='font-size:8.0pt'>
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Figures for
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MJL3281A removed from Comparison of Versions and Transistors page</span></p>
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<p align=left style='margin-top:0cm;margin-right:1.0cm;margin-bottom:0cm;
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margin-left:1.0cm;margin-bottom:.0001pt;text-align:left'><span
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style='font-size:8.0pt'>14/09/2001 Constructors' Comments - Sound Quality page updated</span></p>
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<p align=left style='margin-top:0cm;margin-right:1.0cm;margin-bottom:0cm;
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margin-left:1.0cm;margin-bottom:.0001pt;text-align:left'><span
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style='font-size:8.0pt'>14/10/2001 Current Boosted LM317/337 Regulator page added. JLH Links page amended</span></p>
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<p align=left style='margin-top:0cm;margin-right:1.0cm;margin-bottom:0cm;
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margin-left:1.0cm;margin-bottom:.0001pt;text-align:left'><span
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style='font-size:8.0pt'>04/11/2001 JLH Class-A for the Quad ESL57 page added</span></p>
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<p align=left style='margin-top:0cm;margin-right:1.0cm;margin-bottom:0cm;
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margin-left:1.0cm;margin-bottom:.0001pt;text-align:left'><span
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style='font-size:8.0pt'>07/11/2001 Transistor Substitutes page updated</span></p>
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<p align=left style='margin-top:0cm;margin-right:1.0cm;margin-bottom:0cm;
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margin-left:1.0cm;margin-bottom:.0001pt;text-align:left'><span
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style='font-size:8.0pt'>18/11/2001 JLH Class-A for the Quad ESL57 page updated</span></p>
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<p align=left style='margin-top:0cm;margin-right:1.0cm;margin-bottom:0cm;
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margin-left:1.0cm;margin-bottom:.0001pt;text-align:left'><span
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style='font-size:8.0pt'>19/11/2001 JLH Class-A for the Quad ESL57 page updated</span></p>
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<p align=left style='margin-top:0cm;margin-right:1.0cm;margin-bottom:0cm;
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margin-left:1.0cm;margin-bottom:.0001pt;text-align:left'><span
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style='font-size:8.0pt'>21/11/2001 JLH Class-A for the Quad ESL57 page updated</span></p>
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<p align=left style='margin-top:0cm;margin-right:1.0cm;margin-bottom:0cm;
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margin-left:1.0cm;margin-bottom:.0001pt;text-align:left'><span
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style='font-size:8.0pt'>22/11/2001 JLH Links page updated</span></p>
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<p align=left style='margin-top:0cm;margin-right:1.0cm;margin-bottom:0cm;
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margin-left:1.0cm;margin-bottom:.0001pt;text-align:left'><span
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style='font-size:8.0pt'>05/12/2001 Constructors' Comments - Sound Quality page
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updated</span></p>
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<p align=left style='margin-top:0cm;margin-right:1.0cm;margin-bottom:0cm;
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margin-left:1.0cm;margin-bottom:.0001pt;text-align:left'><span
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style='font-size:8.0pt'>31/01/2002 Resistor power rating notes added to JLH for
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ESL57 and Design Notes pages</span></p>
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<p align=left style='margin-top:0cm;margin-right:1.0cm;margin-bottom:0cm;
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margin-left:1.0cm;margin-bottom:.0001pt;text-align:left'><span
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style='font-size:8.0pt'>04/02/2002 Resistor power rating notes on JLH for ESL57 page revised</span></p>
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<p align=left style='margin-top:0cm;margin-right:1.0cm;margin-bottom:0cm;
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margin-left:1.0cm;margin-bottom:.0001pt;text-align:left'><span
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style='font-size:8.0pt'>27/11/2002 JLH Class-A Update page added. Design Notes page amended</span></p>
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<p align=left style='margin-top:0cm;margin-right:1.0cm;margin-bottom:0cm;
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margin-left:1.0cm;margin-bottom:.0001pt;text-align:left'><span
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style='font-size:8.0pt'>
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Links and redundant pages deleted</span></p>
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<p align=left style='margin-top:0cm;margin-right:1.0cm;margin-bottom:0cm;
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margin-left:1.0cm;margin-bottom:.0001pt;text-align:left'><span
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style='font-size:8.0pt'>28/11/2002 JLH Class-A Update page amended</span></p>
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<p align=left style='margin-top:0cm;margin-right:1.0cm;margin-bottom:0cm;
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margin-left:1.0cm;margin-bottom:.0001pt;text-align:left'><span
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style='font-size:8.0pt'>15/03/2003 Addendum added to JLH Class-A Update page</span></p>
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<p align=left style='margin-top:0cm;margin-right:1.0cm;margin-bottom:0cm;
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margin-left:1.0cm;margin-bottom:.0001pt;text-align:left'><span
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style='font-size:8.0pt'>17/08/2003 JLH Update page amended</span></p>
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<p align=left style='margin-top:0cm;margin-right:1.0cm;margin-bottom:0cm;
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margin-left:1.0cm;margin-bottom:.0001pt;text-align:left'><span
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style='font-size:8.0pt'>02/04/2004 A Little Reminiscing and JLH Class-A
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|
Single-ended or Push-pull pages added</span></p>
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<p align=left style='margin-top:0cm;margin-right:1.0cm;margin-bottom:0cm;
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margin-left:1.0cm;margin-bottom:.0001pt;text-align:left'><span
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style='font-size:8.0pt'>01/05/2004 Updated Regulated Supply page amended</span></p>
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<p align=left style='margin-top:0cm;margin-right:1.0cm;margin-bottom:0cm;
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margin-left:1.0cm;margin-bottom:.0001pt;text-align:left'><span
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style='font-size:8.0pt'> </span></p>
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</div>
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</body>
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