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<!doctype html public "-//w3c//dtd html 4.0 transitional//en">
<html lang="en">
<head>
<meta http-equiv=Content-Type content="text/html; charset=utf-8">
<title>The Class-A Amplifier Site - Jean Hiraga Index</title>
<link rel="StyleSheet" href="class-a.css" type="text/css" media="screen, print">
<link rel="shortcut icon" type="image/ico" href="favicon.ico">
</head>
<body background="slate.jpg" bgcolor="#E8E8E8" lang=EN-GB link=blue vlink=blue>
<div class=Section1>
<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 19 July 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'><b><a href="index-3.htm" title=index-3.htm>[ Back to Index ]</a></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'>&nbsp;</p>
<p style='margin-top:0cm;margin-right:1.0cm;margin-bottom:0cm;margin-left:1.0cm;
margin-bottom:.0001pt'>&nbsp;</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'>Jean Hiraga Class-A Amplifiers</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'>&nbsp;</p>
<p style='margin-top:0cm;margin-right:1.0cm;margin-bottom:0cm;margin-left:1.0cm;
margin-bottom:.0001pt'>The following two designs by Jean Hiraga were originally
published in the French magazine “lAudiophile”. They have a good reputation
for sound quality, but this is not an aspect I have been able to verify
personally. Unfortunately, I am unable to offer any support for these designs
since I have yet to build either of them, but if anyone else has useful
information relating to these amplifiers, for example transistor substitutes,
please let me have the details and I will add them to the Additional
Information page.</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'>It now seems unlikely that I will ever get round to
completing the translation of the articles, due to ill-health and other
priorities, so I have added copies of the original articles for the benefit of
anyone who can read French. For those who cant read French, approximate
(machine generated) translations of sections of the articles can be obtained
using the on-line facilities at <a href="http://www.systransoft.com/" target="_blank" title=SYSTRAN>SYSTRAN</a>.</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'>My thanks go to Rudy van Stratum for sending me copies
of the Hiraga 20W Parts 1 and 2, to Scott Nixon for the Hiraga 20W Part 3 (and
to Jam Somasundram for arranging this) and to Mike Jonasson for the copies of
the Monster articles. I would also like to thank Miroslav Vujica for
supplying a draft translation of the 20W Class-A Part 1 article.</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>
<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 style='margin-top:0cm;margin-right:1.0cm;margin-bottom:0cm;margin-left:1.0cm;
margin-bottom:.0001pt'>&nbsp;</p>
<table class=MsoNormalTable border=0 cellspacing=0 cellpadding=0 width="96%"
style='width:96.18%;border-collapse:collapse'>
<tr>
<td width="79%" valign=top style='width:79.98%;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>The 20W Class-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="20%" valign=top style='width:20.02%;padding:0cm 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>
</td>
</tr>
<tr>
<td width="79%" valign=top style='width:79.98%;padding:0cm 0cm 0cm 0cm'>
<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><img border=0
width=38 height=25 src="fr.gif"></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="20%" valign=top style='width:20.02%;padding:0cm 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'>&nbsp;</span></p>
</td>
</tr>
<tr>
<td width="79%" valign=top style='width:79.98%;padding:0cm 0cm 0cm 0cm'>
<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
href="hiraga1f.htm" title="Part 1 Conception générale">Part 1 <span
style='font-weight:normal'> </span>Conception générale</a></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'>&nbsp;</p>
</td>
<td width="20%" valign=top style='width:20.02%;padding:0cm 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'>7 August 2001</span></p>
</td>
</tr>
<tr>
<td width="79%" valign=top style='width:79.98%;padding:0cm 0cm 0cm 0cm'>
<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
href="hiraga2f.htm" title="Part 2 Construction">Part 2   Construction</a></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="20%" valign=top style='width:20.02%;padding:0cm 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'>8 August 2001</span></p>
</td>
</tr>
<tr>
<td width="79%" valign=top style='width:79.98%;padding:0cm 0cm 0cm 0cm'>
<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
href="hiraga3f.htm" title="Part 3 La version définitive">Part 3 La
version définitive</a>  </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="20%" valign=top style='width:20.02%;padding:0cm 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'>1 August 2001</span></p>
</td>
</tr>
<tr>
<td width="79%" valign=top style='width:79.98%;padding:0cm 0cm 0cm 0cm'>
<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><img border=0
width=38 height=25 src="gb.gif"></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="20%" valign=top style='width:20.02%;padding:0cm 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'>&nbsp;</span></p>
</td>
</tr>
<tr>
<td width="79%" valign=top style='width:79.98%;padding:0cm 0cm 0cm 0cm'>
<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
href="hiraga1.htm" title="Part 1 General design">Part 1   General design</a> 
</b>(lAudiophile No. 10)</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'>&nbsp;</p>
</td>
<td width="20%" valign=top style='width:20.02%;padding:0cm 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'>19 July 2004</span></p>
</td>
</tr>
<tr>
<td width="79%" valign=top style='width:79.98%;padding:0cm 0cm 0cm 0cm'>
<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
href="hiraga2.htm" title="Part 2 Construction">Part 2   Construction</a> 
</b>(lAudiophile No. 11)</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="20%" valign=top style='width:20.02%;padding:0cm 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'>9 August 2001</span></p>
</td>
</tr>
<tr>
<td width="79%" valign=top style='width:79.98%;padding:0cm 0cm 0cm 0cm'>
<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
href="hiraga3.htm" title="Part 3 The final version">Part 3 The final
version</a>  </b>(lAudiophile No. 15)</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="20%" valign=top style='width:20.02%;padding:0cm 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'>19 July 2001</span></p>
</td>
</tr>
<tr>
<td width="79%" valign=top style='width:79.98%;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>The Monster</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="20%" valign=top style='width:20.02%;padding:0cm 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'>&nbsp;</span></p>
</td>
</tr>
<tr>
<td width="79%" valign=top style='width:79.98%;padding:0cm 0cm 0cm 0cm'>
<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><img border=0
width=38 height=25 src="fr.gif"></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="20%" valign=top style='width:20.02%;padding:0cm 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'>&nbsp;</span></p>
</td>
</tr>
<tr>
<td width="79%" valign=top style='width:79.98%;padding:0cm 0cm 0cm 0cm'>
<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
href="monster27f.htm" title="Amplificateurs classe A 8 watts « Le monstre »">Amplificateurs
classe A 8 watts « Le monstre »</a></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="20%" valign=top style='width:20.02%;padding:0cm 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'>1 August 2001</span></p>
</td>
</tr>
<tr>
<td width="79%" valign=top style='width:79.98%;padding:0cm 0cm 0cm 0cm'>
<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
href="monster29f.htm" title="Amplificateurs 8 W « Le monstre » Lalimentation">Amplificateurs
8 W « Le monstre » Lalimentation</a></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="20%" valign=top style='width:20.02%;padding:0cm 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'>1 August 2001</span></p>
</td>
</tr>
<tr>
<td width="79%" valign=top style='width:79.98%;padding:0cm 0cm 0cm 0cm'>
<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
href="monster31f.htm" title="Retour sur le 8 W « Le monstre »">Retour sur le
8 W « Le monstre »</a></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="20%" valign=top style='width:20.02%;padding:0cm 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'>1 August 2001</span></p>
</td>
</tr>
<tr>
<td width="79%" valign=top style='width:79.98%;padding:0cm 0cm 0cm 0cm'>
<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><img border=0
width=38 height=25 src="gb.gif"></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="20%" valign=top style='width:20.02%;padding:0cm 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'>&nbsp;</span></p>
</td>
</tr>
<tr><td width="79%" valign=top style='width:79.98%;padding:0cm 0cm 0cm 0cm'>
<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 href="monster27.htm" title="Class A Amplifier 8 watts 'Le monstre'">Class A Amplifier 8 watts "Le monstre" (The Monster)</a></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="20%" valign=top style='width:20.02%;padding:0cm 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'>November 2012</span></p>
</td>
</tr>
<tr>
<td width="79%" valign=top style='width:79.98%;padding:0cm 0cm 0cm 0cm'>
<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
href="monster29.htm" title="The Monster - Power Supply">The Monster - Power Supply</a></b> (lAudiophile No. 29)</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="20%" valign=top style='width:20.02%;padding:0cm 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'>November 2012</span></p>
</td>
</tr>
<tr>
<td width="79%" valign=top style='width:79.98%;padding:0cm 0cm 0cm 0cm'>
<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
href="monster31.htm" title="'The Monster' revisited">The Monster Revisited</a></b> 
(lAudiophile No. 31)</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'>&nbsp;</p>
</td>
<td width="20%" valign=top style='width:20.02%;padding:0cm 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'>16 July 2001</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'>&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-3.htm" title=index-3.htm>[ Back to
Index ]</a></b></p>
<p style='margin-top:0cm;margin-right:1.0cm;margin-bottom:0cm;margin-left:1.0cm;
margin-bottom:.0001pt'><b>&nbsp;</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>
<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'>  
Page created 05/07/2001 </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'>10/07/2001 20W Class-A split into 3 parts</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'>12/07/2001 Figures added to all articles</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'>14/07/2001 Text added to Hiraga 20W Part 3 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'>16/07/2001 Text added to Return to the Monster page.
Minor corrections to Hiraga 20W Part 3 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'>19/07/2001 Figures 4 and 5 added to Hiraga 20W Part 3
article. Figure 10 moved to separate page</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'>01/08/2001 Original articles for the 20W Class-A Part 3
and The Monster 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'>07/08/2001 Original article for the 20W Class-A Part 1
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'>08/08/2001 Original article for the 20W Class-A Part 2
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'>09/08/2001 Translation of 20W Class-A article Part 2
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'>14/11/2001 Transistor Substitutes 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'>27/04/2004 Transistor Substitutes page deleted</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'>19/07/2004 Translation of 20W Class-A article Part 1
added</span></p>
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