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Old 9th September 2005, 09:02 PM   #1
kpero is offline kpero  Croatia
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Default help with amp

Hello

I am building an amp. Here is shematic.
It's prety easy amp ,with distortion about 0.08 %. It is part of system which will amp my woofers. Preamp is already built and now it's time for amplifier.

Value of elements are default so don't look at.
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Old 9th September 2005, 09:08 PM   #2
kpero is offline kpero  Croatia
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And here is the shematic. This is my firs project so I want to know is this will work as i did it?

Thanks
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Old 9th September 2005, 09:48 PM   #3
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Yes it will, for that's the one of generic topologies used frequently and you will find hundreds of almost indentical schematics all over the WEB.
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Old 10th September 2005, 08:20 AM   #4
AndrewT is offline AndrewT  Scotland
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Hi Kpero,
Q4 & Q6 need current capacity to drive the output fets at high frequency. You may need to add a pair of drivers (fet or bjt) to ensure front end can work.
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Old 10th September 2005, 08:44 AM   #5
djk is offline djk
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Your board layout is for IRF type V-mos.

They will blow up with your bias circuit.

Hitachi type L-mos will work with your bias circuit, but they require the drain and source layout be swapped, they are harder to find, and are more expensive.
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Old 10th September 2005, 12:47 PM   #6
kpero is offline kpero  Croatia
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AndrewT wrote:
>You may need to add a pair of drivers (fet or bjt) to ensure front end >can work

Can you draw me . I am not shure I understand what you have in mind.
I will repeat, I dont have much experiance in amp's. I am still learning?
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