jlh class a amplifier
DESCRIPTION
Class A ampliTRANSCRIPT
JLH Class A Amplifier
http://www.tcaas.btinternet.co.uk/index-1.htm
http://www.tcaas.btinternet.co.uk/
The Class-A Amplifier SiteThis site was last updated on 18 January 2007
This site is primarily dedicated to the Class-A amplifier designed by John Linsley Hood, which was originally published in Wireless World in April 1969 (with a postscript in December 1970) and later updated in Electronics World in September 1996. However, other Class-A design articles by Jean Hiraga, James Sugden, Stan Curtis and L Nelson-Jones have been added, along with some more JLH circuits. Schematics for other Class-A amplifiers and for three classic Class-B commercial amplifiers, the NAD3020, the Cyrus 1 and the Sugden A48-II, have been included for reference.
Index
Last Updated
The JLH Class-A Amplifier
1 May 2004
Other JLH Amplifier Designs
12 January 2002
Other Class-A Amplifiers
19 July 2004
Classic Class-B Schematics
17 August 2003
JLH Power Amp Schematics
18 January 2007
The Published Articles of John Linsley Hood
18 January 2007
New pages and significant revisions will be indicated by having the ‘Last Updated’ column entry coloured red. This identification will remain for a period of about one month. Minor amendments to a page will be simply indicated by a change to the ‘Last Updated’ column. A summary of content changes, where appropriate, can be found in the ‘History’ at the bottom of each page. All material that has been reproduced from the original articles is the copyright of the appropriate author and/or publisher. This website is maintained by Geoff Moss. I can be contacted at:
The JLH Class-A Amplifier
Index
Last Updated
The JLH Class-A Articles
The Original Article - Wireless World April 1969 184kB
Oscilloscope Traces & Photographs from the 1969 Article
538kB
Letter to the editor - Wireless World October 1969 39kB
The Postscript - Wireless World December 1970 122kB
The Update - Electronics World September 1996 142kB
A Little Reminiscing - Electronics World May 2000 16kB
Power Supplies for the JLH Class-A
An updated, regulated power supply for the 1996 version
1 May 2004
A Current Boosted LM317/LM337 Regulator
14 October 2001
The Capacitance Multiplier
17 May 2001
A Simple Voltage Regulator
17 May 2001
Additional Information for the JLH Class-A
JLH Class-A - Single-ended or Push-pull? 23kB
JLH Class-A Update
17 August 2003
A JLH Class-A for the Quad ESL57
4 February 2002
Design Notes
27 November 2002
Transistor Substitutes
7 November 2001
D C Voltages (for testing / fault-finding)
7 May 2001
Earthing
7 May 2001
Constructors’ Comments – Sound Quality
5 December 2001
Contributed Articles
A Dutch journey in JLH-land (By Rudy van Stratum)
19 August 2001
