|
|
<!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</title>
|
|
|
<link rel="StyleSheet" href="class-a.css" type="text/css" media="screen, print">
|
|
|
<link rel="shortcut icon" type="image/ico" href="favicon.ico">
|
|
|
<meta name=description
|
|
|
content="A site primarily dedicated to the John Linsley Hood Class-A amplifier design, originally published in 1969 and later updated in 1996.">
|
|
|
<meta name=keywords
|
|
|
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">
|
|
|
</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.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'> </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> </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 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'> </p>
|
|
|
|
|
|
<p style='margin-top:0cm;margin-right:1.0cm;margin-bottom:0cm;margin-left:1.0cm;
|
|
|
margin-bottom:.0001pt'><a name=index></a> </p>
|
|
|
|
|
|
<table class=MsoNormalTable border=0 cellspacing=0 cellpadding=0 width="100%"
|
|
|
style='width:100.0%;border-collapse:collapse'>
|
|
|
<tr>
|
|
|
<td width="77%" valign=top style='width:77.76%;padding:0cm 0cm 0cm 0cm'>
|
|
|
<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:1.0cm;margin-bottom:.0001pt;text-align:left'><b> </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>
|
|
|
</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="hiraga.htm" title=hiraga.htm>Jean Hiraga 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'> </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'>19 July 2004</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="curtis60w.gif" title=curtis60w.gif>Stan Curtis 60W – Schematic</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'> </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'><a href="curtis60w.gif" title=curtis60w.gif><span
|
|
|
style='color:windowtext;text-decoration:none'><img border=0 width=28
|
|
|
height=31 src="gif.gif"></span></a></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="curtis60w.pdf" title=curtis60w.pdf>Article</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> </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'><a href="curtis60w.pdf" title=curtis60w.pdf><span
|
|
|
style='font-size:8.0pt;color:windowtext;text-decoration:none'>560kB </span><span
|
|
|
style='color:windowtext;text-decoration:none'><img border=0 width=28
|
|
|
height=31 src="pdf.gif"></span></a></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="nj10w.gif" title=nj10w.gif>Nelson-Jones 10W – Schematic</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> </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'><a href="nj10w.gif" title=nj10w.gif><span
|
|
|
style='color:windowtext;text-decoration:none'><img border=0 width=28
|
|
|
height=31 src="gif.gif"></span></a></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="nj10w.pdf" title=nj10w.pdf>Article</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'> </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'><a href="nj10w.pdf" title=nj10w.pdf><span
|
|
|
style='font-size:8.0pt;color:windowtext;text-decoration:none'>399kB</span><span
|
|
|
style='color:windowtext;text-decoration:none'> <img border=0 width=28
|
|
|
height=31 src="pdf.gif"></span></a></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="sugden10w.gif" title=sugden10w.gif>Sugden 10W – Schematic</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> </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'><a href="sugden10w.gif" title=sugden10w.gif><span
|
|
|
style='color:windowtext;text-decoration:none'><img border=0 width=28
|
|
|
height=31 src="gif.gif"></span></a></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="sugden10w.pdf" title=sugden10w.pdf>Article</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'> </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'><a href="sugden10w.pdf" title=sugden10w.pdf><span
|
|
|
style='font-size:8.0pt;color:windowtext;text-decoration:none'>168kB</span><span
|
|
|
style='color:windowtext;text-decoration:none'> <img border=0 width=28
|
|
|
height=31 src="pdf.gif"></span></a></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="jc-3.gif"
|
|
|
title=jc-3.gif>John Curl JC-3 – Schematic</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'> </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'><a href="jc-3.gif" title=jc-3.gif><span
|
|
|
style='color:windowtext;text-decoration:none'><img border=0 width=28
|
|
|
height=31 src="gif.gif"></span></a></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="mf-a1.gif" title=mf-a1.gif>Musical Fidelity A1 – Schematic</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'> </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'><a href="mf-a1.gif" title=mf-a1.gif><span
|
|
|
style='color:windowtext;text-decoration:none'><img border=0 width=28
|
|
|
height=31 src="gif.gif"></span></a></span></p>
|
|
|
</td>
|
|
|
</tr>
|
|
|
</table>
|
|
|
|
|
|
<p class=MsoNormal style='margin-top:0cm;margin-right:1.0cm;margin-bottom:0cm;
|
|
|
margin-left:1.0cm;margin-bottom:.0001pt'><span style='font-size:12.0pt'> </span></p>
|
|
|
|
|
|
<p class=MsoNormal style='margin-top:0cm;margin-right:1.0cm;margin-bottom:0cm;
|
|
|
margin-left:1.0cm;margin-bottom:.0001pt'><b><span style='font-size:12.0pt'><a
|
|
|
href="index.htm" title=index.htm>[ Back to Main Index ]</a></span></b></p>
|
|
|
|
|
|
<p class=MsoNormal style='margin-top:0cm;margin-right:1.0cm;margin-bottom:0cm;
|
|
|
margin-left:1.0cm;margin-bottom:.0001pt'><span style='font-size:12.0pt'> </span></p>
|
|
|
|
|
|
<div style='margin-left:1.0cm;margin-right:1.0cm'>
|
|
|
|
|
|
<hr />
|
|
|
|
|
|
</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'>
|
|
|
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'>05/07/2001 Hiraga pages 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'>10/07/2001 Hiraga pages updated</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 Hiraga 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 Hiraga 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 Hiraga 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 Hiraga 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'>14/10/2001 John Curl’s JC-3 and Sugden 10W Class-A
|
|
|
pages 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'>28/10/2001 Musical Fidelity A1 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'>14/11/2001 Hiraga 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'>18/11/2001 Sugden 10W 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'>09/12/2001 Nelson-Jones 10W 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'>25/12/2001 Stan Curtis 60W 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'>07/05/2002 Error corrected in Stan Curtis 60W Fig 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'>27/04/2004 Hiraga 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>
|
|
|
|
|
|
</div>
|
|
|
|
|
|
</body>
|
|
|
|
|
|
</html>
|
