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Old 23rd August 2010, 08:59 AM   #1
Antivot is offline Antivot  Romania
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Default Small class a amplifier project

I would like some pcb layouts for a small class a amp ...3-5 watts ...and if it`s posibile a eagle or target file ... so i can print it and start building ...
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Old 23rd August 2010, 01:27 PM   #2
acqu27 is offline acqu27  France
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Here you will find something looking good, but no layout nor PCB. It is so simple you can do it fast.
3 - 5 Watt Class-A Audio Amplifier - RED - Page80
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Old 23rd August 2010, 05:29 PM   #3
Bigun is offline Bigun  Canada
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Try this:

ESP Projects Pages - DIY Audio and Electronics
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Old 23rd August 2010, 08:29 PM   #4
lineup is offline lineup  Sweden
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Quote:
Originally Posted by Bigun View Post
DOZ, Death of ZEN is a Class A amplifier at ESP Projects
Death of Zen - A new Class-A power amp

Click the image to open in full size.
The test circuit used by Rod Elliott is a very basic Class A with resistor loaded output ( 8 Ohm ).
This schematic shows +24 Volt supply.
But it will actually work without problems at lower voltage, too.
And you could very well use other transistors with good results.
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Old 23rd August 2010, 09:35 PM   #5
forr is offline forr  France
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Just released yesterday, an idea by Mike Renardson (end of page) :
HEADPHONE AMPLIFIER DESIGN, PART 1.
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Old 23rd August 2010, 11:11 PM   #6
Bigun is offline Bigun  Canada
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Quote:
Originally Posted by forr View Post
Just released yesterday, an idea by Mike Renardson (end of page) :
HEADPHONE AMPLIFIER DESIGN, PART 1.
yeah, but as neither of the circuits at the end of the page are proven it might not be good for a first go


the author states:

"Here is an untried version with component values"

"This circuit could also possibly work as a low power class-A amplifier"

Anyhow another simple option might be something that doesn't even require a pcb - just use point-to-point wiring.

for example:

http://diyaudioprojects.com/Solid/ZCA/ZCA.htm
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Last edited by Bigun; 23rd August 2010 at 11:18 PM.
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