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Old 28th June 2003, 05:48 PM   #1
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Default 20 Watt Class A amplifier

I found a schematic of this easy to build Class A amp that would be great for a beginner
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Old 28th June 2003, 05:55 PM   #2
PMA is offline PMA  Europe
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Based on John Linsley Hood's 34 years old project, modified probably by Rod Elliott. Not so bad (and not excellent), for the real beginners you will find more suitable schematics with similar or better parameters and sonic results.
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Old 28th June 2003, 10:20 PM   #3
paulb is online now paulb  Canada
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Yes, the Death of Zen. Aspiring builders should note that you need big heatsinks for this one, and there is an update to regulate the voltage on the first trimpot.
http://sound.westhost.com/project36.htm
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Old 28th June 2003, 10:58 PM   #4
Bob03 is offline Bob03  Canada
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Smile Bebe T

http://diyaudio.8m.com/Bebet/bebet_sch.html
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Old 28th June 2003, 11:23 PM   #5
PGW is offline PGW  United States
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Default Lang 20W MOSFET

The Lang 20W MOSFET Class A amp is an alternative (The Audio Amateur 2/86). Perhaps a bit coplicated for a complete beginner, it does have a PCB layout, though I don't know whether boards are still available, and a component stuffing plan.

It has paralleled MOSFET output, so if 20W is too much, you could omit one pair of the output FETs, and reduce the size of the transformer (reduce your electricity bill, too).

The circuit is in 'The Audio Amateur Power Amp Projects' - I don't have a copy of this book.
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Old 29th June 2003, 05:11 AM   #6
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Quote:
Originally posted by PMA
Based on John Linsley Hood's 34 years old project, modified probably by Rod Elliott.
Perhaps it would be more aptly named "The Resurrection of Hood"
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Old 29th June 2003, 05:38 AM   #7
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I`m aware of the design and if this thread is useless please delete it

DIRT®
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Old 29th June 2003, 06:40 AM   #8
PMA is offline PMA  Europe
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Joe Dirt: Oh no, why to delete.

Nelson Pass:
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Old 31st January 2012, 11:41 PM   #9
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Quote:
Originally Posted by JOE DIRT® View Post
I found a schematic of this easy to build Class A amp that would be great for a beginner
Amplificador KB90 – 90 Watts R2 Network
This version is really really easy to build.... for beginners...
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