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Shelah 12th December 2012 07:42 AM

1 Attachment(s)
can anyone translate this into english for me cause i intend on making this mosfet amplifier!!!

bobodioulasso 12th December 2012 08:59 AM

Not able to transate but...

Rangkaian 200W MOSFET Amplifier | Audio Circuits

250Watts MOSFET Audio Amplifier Circuit with J162-K1058 – Free Electronic Circuit Schematics

tiefbassuebertr 12th December 2012 09:38 AM


Originally Posted by Shelah (
can anyone translate this into english for me cause i intend on making this mosfet amplifier!!!

Very bad headline. Start a new thread with more exact headline (more exact topic) e.g.:
DIY project power amp from a "???" audio magazin "???" - translating wanted
An other advice:
Modern OCR software like
ABBYY FineReader OCR software for text recognition and document conversion with OCR PDF features
is able to understand all languages in the meantime.
So you can convert this jpg file in an text file. In follow you can try to use the google language tools.

P.S.: is it Thai language ?? Which magazine?

tommy1000 12th December 2012 11:38 AM

The file in post #1 is from a kit from a company in Thailand:
They have an "800W" version also.
Price list is here:

Shelah 13th December 2012 06:59 AM

thanks bobodioulasso for thyose links. i do not know the language it was printed in but what am interested is the bias current.
tommy1000 thanks for your reply. can you help me translate the notes in the projects?

bobodioulasso 13th December 2012 12:08 PM

I can' tread thailandese though i can see on your document Vr2...... 60/100.
That is 60 to 100 mA per pair set by Vr2
Which is in the right ballpark for these laterals.

tommy1000 13th December 2012 07:10 PM

Yes, the text says to set bias to 60 - 100 mA. Otherwice it is a generel description of the circuit, output power and transistors used. To mount the components at the correct position etc.

Shelah 15th December 2012 08:46 AM

one other thing i wanted to find out. can i use irfp240/9240 as outputs?

bobodioulasso 15th December 2012 11:21 AM

Not without schematic modification.
The biasing voltage is different for vertical mosfets (IRFP) and laterals.
The temperature co. also are opposite.
The bias diode string will not work for IRFP. A vbe multiplier will be needed.
You should go with another schematic unless you have the skill to design the mod.

JMFahey 15th December 2012 12:30 PM

Short answer: if you build it , respect the project and do it "by the book".
Now, if you find the original lateral MosFets very expensive (I think so), just look for *another* project.
I looked at their page and they also offer bipolar kits, which must be more reasonably priced.

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