The Original Sugden A21 - Audio Misc
The above shows the original circuit diagram for the A21 as hand-drawn by Jim Sugden. If you wish to see a larger, more detailed version, click here . The specifications of the original JES A21 were the same as for the Richard Allan version, so I have not repeated them here.
Sugden Audio Schematics & Service Manuals - Audio Circuit
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Sugden A21a...hummy - diyAudio
May 10, 2015 · about one year ago I bought a 2nd hand Sugden A21a power amp circa 1999. I used it with great pleasure for about 6 months with a pair of Davis Acoustics bookshelfs. Then I moved it to my main set with two big Tannoy Gold and...hum! Hum on …
Sugden A21 clone modification - diyAudio
Jun 26, 2019 · Hi All, I came across a Sugden A21 mod circuit in the net. Quickly I input and simulate it in ltspice. The result is surpisingly good. I understand that it...
Sugden A21 Stereo Integrated Amplifier Manual - HiFi Engine
Specifications. Series Two. Power output: 12 watts per channel into 8Ω (stereo) Frequency response: 30Hz to 20kHz. Total harmonic distortion: 0.25%. Input sensitivity: 2.5mV (MM), 50mV (ceramic), 150mV (line)
Sugden A21a schematic | Stereo Amplifiers & Pre-Amps
Dec 21, 2011 · Does anyone have or can anyone point me in the direction of a Sugden A21a schematic please ? I don't have a schematic for one, but what is wrong with the amp? Sugdens are pretty simple amps, topology-wise and standard fault-finding techniques will serve you well.
Sugden A21 Series 2 amplifier - Hi-Fi News
Dec 1, 2017 · Designed by James Sugden in collaboration with Richard Allan, is the second iteration of this milestone Class A transistorised amp the one to buy? It's time to check it out... The late '60s provide an interesting choice of equipment for the vintage hi-fi enthusiast.
Sugden A21a squeal, utterly baffled - Audiokarma Home Audio …
Jul 31, 2021 · Sugden has a way of using simple circuitry. This A21a however is more complex than the previous version A21ii so they may have underengineered this design. Also keep in mind that it oscillates both with or without load.
Sugden Audio A21 Signature Pure Class ‘A’ Integrated Amplifier
Apr 21, 2016 · The Sugden A21 Pure Class ‘A’ Integrated Amplifier has a lineage stretching back almost 50 years. In 1967 James Edward Sugden designed and produced the worlds first commercially available solid state pure Class ‘A’ amplifier the A21.
Sugden A21ai Series 2 integrated amplifier | Stereophile.com
Feb 18, 2009 · The warm, silver amp is directly descended from the Sugden A21a integrated amplifier, which Sam Tellig reviewed in Stereophile in February 2005, and which also impressed John Marks and other reviewers. The new model has virtually the same output section as the old, using only NPN output transistors in what is said to be a single-ended ...
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