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Old 23rd October 2014, 06:18 PM   #1
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Default super basic ab amplifier?

Can some link me to a super basic ab amplifier circuit and parts list, that I can bread board to a speaker.

Nothing too complicated, just something I can play with.. maybe ten watts.

Thanks.
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Old 23rd October 2014, 09:14 PM   #2
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http://www.ti.com/lit/ds/symlink/lm1875.pdf
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Old Yesterday, 09:59 AM   #3
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If you like a bit more discrete circuitry, this one looks good and the specs are excellent for the simplicity. It should be easily do-able on matrix or strip board. BOM and construction notes included.
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Old Yesterday, 10:22 AM   #4
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Default can not be more simple

google for tda7375 application
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Old Yesterday, 10:22 AM   #5
JMFahey is offline JMFahey  Argentina
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Oh, PLEASE!!!
Do NOT recommend anything from Red Circuits pages, the repository for the worst designs on the Net.

That amp, like most others there, is an unstable nightmare.

EDIT: LM1875 or TDA20xx is a great way to start.

Excellent sound, guaranteed to work, tons of designs using them all over the Net, what's not to like?

Last edited by JMFahey; Yesterday at 10:24 AM.
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Old Yesterday, 10:30 AM   #6
Mooly is offline Mooly  United Kingdom
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Quote:
Originally Posted by Sounduser View Post
Can some link me to a super basic ab amplifier circuit and parts list, that I can bread board to a speaker.

Nothing too complicated, just something I can play with.. maybe ten watts.

Thanks.
Can you tell us what voltage you have to work with and whether it needs to be a single rail (advised) or a dual rail design ?
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Old Yesterday, 10:45 AM   #7
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Quote:
Originally Posted by JMFahey View Post
....Do NOT recommend anything from Red Circuits pages, the repository for the worst designs on the Net......
Really? A young friend built a pair of those with the bass boost feature disabled, some time back - still fine from the first power-up as far as I know.

However, as the OP is looking for something to play with, I get the sense that chipamp apps won't be what he wants.
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Old Yesterday, 12:21 PM   #8
bimo is offline bimo  Indonesia
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I sim this schematic for my friend who want build this using SMD parts. I wait his implementation.

This is very simple amplifier, and I am sure it will work at first trying. You can change VAS transistor (Q4) to better one, example: 2SA1381.

The article is using Indonesia language here.
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Old Yesterday, 01:13 PM   #9
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Two classical circuits:
Simple 60 Watt Power Amplifier
Retro Amp 50W Single Supply
Or http://sound.westhost.com/project12a.htm
Will need some downscaling for 10-15W.
If you want multiple feedback: http://elektrotanya.com/heathkit_ar-.../download.html

Last edited by franzm; Yesterday at 01:21 PM.
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Old Yesterday, 09:45 PM   #10
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Default Who wants to build a chipamp?!

Here is a simple design with a bare minimum parts that I have not yet tested but should work fine.

The 2SK3320 is a dual device surface mount package, available from a number of suppliers. But if you are bread boarding you will find it easier to work with TO92 packaged JFETs instead.

Add an input cap if your source has any DC.
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