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<title>The Class-A Amplifier Site</title>
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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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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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<p align=right style='margin-top:0cm;margin-right:1.0cm;margin-bottom:0cm;
margin-left:1.0cm;margin-bottom:.0001pt;text-align:right'><b>The Class-A
Amplifier Site</b></p>
<p align=right style='margin-top:0cm;margin-right:1.0cm;margin-bottom:0cm;
margin-left:1.0cm;margin-bottom:.0001pt;text-align:right'><span
style='font-size:10.0pt'>This page was last updated on 13 January 2002</span></p>
<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><a href="index.htm"
title=index.htm>[ Back to Main Index ]</a></b></p>
<p align=left style='margin-top:0cm;margin-right:1.0cm;margin-bottom:0cm;
margin-left:1.0cm;margin-bottom:.0001pt;text-align:left'><span
style='font-size:10.0pt'>&nbsp;</span></p>
<p align=center style='margin-top:0cm;margin-right:1.0cm;margin-bottom:0cm;
margin-left:1.0cm;margin-bottom:.0001pt;text-align:center'><b>&nbsp;</b></p>
<p align=center style='margin-top:0cm;margin-right:1.0cm;margin-bottom:0cm;
margin-left:1.0cm;margin-bottom:.0001pt;text-align:center'><b><span
style='font-size:20.0pt'>Other JLH Amplifier Designs</span></b></p>
<p style='margin-top:0cm;margin-right:1.0cm;margin-bottom:0cm;margin-left:1.0cm;
margin-bottom:.0001pt'>&nbsp;</p>
<p style='margin-top:0cm;margin-right:1.0cm;margin-bottom:0cm;margin-left:1.0cm;
margin-bottom:.0001pt'><a name=index></a>&nbsp;</p>
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<p style='margin-top:0cm;margin-right:1.0cm;margin-bottom:0cm;margin-left:
1.0cm;margin-bottom:.0001pt'><b><span style='font-size:16.0pt'>Index</span></b></p>
<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>&nbsp;</b></p>
</td>
<td width="22%" valign=top style='width:22.24%;padding:0cm 1.0cm 0cm 0cm'>
<p align=right style='margin-top:0cm;margin-right:5.65pt;margin-bottom:0cm;
margin-left:5.65pt;margin-bottom:.0001pt;text-align:right'><u><span
style='font-size:10.0pt'>Last Updated</span></u></p>
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</tr>
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<td width="77%" valign=top style='width:77.76%;padding:0cm 0cm 0cm 0cm'>
<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><a
href="jlhphones.htm" title=jlhphones.htm>JLH Headphone Amplifiers</a></b></p>
<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>&nbsp;</b></p>
</td>
<td width="22%" valign=top style='width:22.24%;padding:0cm 1.0cm 0cm 0cm'>
<p align=right style='margin-top:0cm;margin-right:5.65pt;margin-bottom:0cm;
margin-left:5.65pt;margin-bottom:.0001pt;text-align:right'><span
style='font-size:10.0pt'>20 July 2001</span></p>
</td>
</tr>
<tr>
<td width="77%" valign=top style='width:77.76%;padding:0cm 0cm 0cm 0cm'>
<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><a
href="jlhab.htm" title=jlhab.htm>15-20W Class AB Audio Amplifier</a></b></p>
<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>&nbsp;</b></p>
</td>
<td width="22%" valign=top style='width:22.24%;padding:0cm 1.0cm 0cm 0cm'>
<p align=right style='margin-top:0cm;margin-right:5.65pt;margin-bottom:0cm;
margin-left:5.65pt;margin-bottom:.0001pt;text-align:right'><span
style='font-size:10.0pt'>12 January 2002</span></p>
</td>
</tr>
<tr>
<td width="77%" valign=top style='width:77.76%;padding:0cm 0cm 0cm 0cm'>
<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><a
href="jlhmodpre.htm" title=jlhmodpre.htm>Modular Pre-Amplifier Design</a></b></p>
<p align=left style='margin-top:0cm;margin-right:1.0cm;margin-bottom:0cm;
margin-left:1.0cm;margin-bottom:.0001pt;text-align:left'>&nbsp;</p>
</td>
<td width="22%" valign=top style='width:22.24%;padding:0cm 1.0cm 0cm 0cm'>
<p align=right style='margin-top:0cm;margin-right:5.65pt;margin-bottom:0cm;
margin-left:5.65pt;margin-bottom:.0001pt;text-align:right'><span
style='font-size:10.0pt'>13 January 2002</span></p>
</td>
</tr>
</table>
<p style='margin-top:0cm;margin-right:1.0cm;margin-bottom:0cm;margin-left:1.0cm;
margin-bottom:.0001pt'>&nbsp;</p>
<p style='margin-top:0cm;margin-right:1.0cm;margin-bottom:0cm;margin-left:1.0cm;
margin-bottom:.0001pt'><b><a href="index.htm" title=index.htm>[ Back to Main
Index ]</a></b></p>
<p style='margin-top:0cm;margin-right:1.0cm;margin-bottom:0cm;margin-left:1.0cm;
margin-bottom:.0001pt'>&nbsp;</p>
<div style='margin-left:1.0cm;margin-right:1.0cm'>
<div class=MsoNormal><span style='font-size:12.0pt'>&nbsp; </span>
<hr size=3 width="100%" align=left>
</div>
</div>
<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><span
style='font-size:8.0pt'>HISTORY:</span></b><span style='font-size:8.0pt'>&nbsp;&nbsp;
Page created 04/04/2004 </span></p>
<p align=left style='margin-top:0cm;margin-right:1.0cm;margin-bottom:0cm;
margin-left:1.0cm;margin-bottom:.0001pt;text-align:left'><span
style='font-size:8.0pt'>20/07/2001 JLH Class AB pages added. JLH Headphone
Amplifiers page added.</span></p>
<p align=left style='margin-top:0cm;margin-right:1.0cm;margin-bottom:0cm;
margin-left:1.0cm;margin-bottom:.0001pt;text-align:left'><span
style='font-size:8.0pt'>06/01/2002 JLH Modular Pre-Amplifier Design article
added</span></p>
<p align=left style='margin-top:0cm;margin-right:1.0cm;margin-bottom:0cm;
margin-left:1.0cm;margin-bottom:.0001pt;text-align:left'><span
style='font-size:8.0pt'>12/01/2002 December 1970 letter added to JLH Class-AB
article (Part 3)</span></p>
<p align=left style='margin-top:0cm;margin-right:1.0cm;margin-bottom:0cm;
margin-left:1.0cm;margin-bottom:.0001pt;text-align:left'><span
style='font-size:8.0pt'>13/01/2002 Hi-res Fig. 1 and December 1970 postscript
added to JLH Modular Pre-amp article</span></p>
<p align=left style='margin-top:0cm;margin-right:1.0cm;margin-bottom:0cm;
margin-left:1.0cm;margin-bottom:.0001pt;text-align:left'><span
style='font-size:8.0pt'>&nbsp;</span></p>
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