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Old 25th September 2004, 06:51 PM   #1
djdamix is offline djdamix  France
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Default amplifier gain

I'm building a mos power amp, it runs at +-70V dc. The gain of the amplifier is 100 and so with about ( 0.2v line level) input i get only 20v output. What is the best solution :
- rise the gain of the amplifier ( may be problem of oscillation ... ??)
- Add a input amplifier before the power amplifier ?

Thanks for any advice

ps:
I'm quite happy since it is my second project and I get 200W @ 8 ohms with it ;-) Thanks to diyaudi members !
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Old 25th September 2004, 06:56 PM   #2
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May I ask, what is your source that it just gives 0.2V out?

Jan Didden
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Old 25th September 2004, 06:58 PM   #3
djdamix is offline djdamix  France
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i put 0.2v since i think it is "line level" output voltage (cd player, mp3 portable player) ... isn't it ?
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Old 25th September 2004, 07:03 PM   #4
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2V is line level.......
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