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The Projects Forum Working on an electronics project and would like some suggestions, help or critiques? If you would like to comment or assist others with their projects, this is the place to do it.

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Old 07-10-2007, 01:11 PM
amaynew amaynew is offline
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Default Need help for Home made audio amplifier

Guys, I suck at designing circuits and I was wondering if you could help me create a schematic for a 200W audio amplifier, and take note it must not use Op-amps.

And if you have Circuit design tips, I would gladly want to read them. Thanks. I wanted to learn how.
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Old 07-10-2007, 01:25 PM
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cumesoftware cumesoftware is offline
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Well, I could give you tips, but the users of this forum usualy don't create circuits on demand. Please, show us what you have done so far. Post your circuit diagram so we can help.
I love the smell of toasted transistors in the morning.
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Old 07-10-2007, 03:48 PM
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lightingman lightingman is offline
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There are many designes for high power amps out there....First you must ask yourself what it will be used for, (general PA, high quality audio and so on)....Next,,, what type of amp.. (class A, class B) and so on.....What devices do you wish to use (bipolar transistors, MOSSFET''s or valves)...The design of audio power amps is a complicated proccess....Look at some other designes to get some ideas, but I don't think you could come up with anything ground breaking....Good luck...Daniel.
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Old 07-10-2007, 03:56 PM
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JoeJester JoeJester is online now
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visit ... for an idea.
Navy Electricity and Electronics Training Series (NEETS) - pdf files -
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Old 07-10-2007, 06:28 PM
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cumesoftware cumesoftware is offline
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If you are new to electronics, you can use a power amplifier IC for your amplifier. ST electronics has a wide selection (TDA2003, TDA2006, TDA2030, etc.). Venturing to discrete components requires a lot of knowledge.

Also, I would advice the use of class A or class AB if you wan't fidelity. Class B is more efficient that the previous classes, but it has higher distortion. Class A theoretically has no distortion, but is the least efficient. Class AB is the best of both classes (very small distortion and highter efficiency than class A - push-pull configuration). Class C is not an option here.
I love the smell of toasted transistors in the morning.
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Old 07-10-2007, 11:28 PM
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thingmaker3 thingmaker3 is offline
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...not a "beginner level" project, by any means, but it is 200+ Watts with no op-amps.

By the way, why the "no op-amps" requirement?
"I want to establish in your mind very clearly that you must not think I deny all that I do not admit. On the contrary, I think there are many things which may be true, and which I shall receive as such hereafter, though I do not as yet receive them; but that is not because there is any proof to the contrary, but that the proof in the affirmative is not yet sufficient for me"
- Michael Faraday
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Old 07-11-2007, 06:58 AM
mrmeval mrmeval is offline
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The 'no op amps' sounds like some neolithic techur requirement.
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