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5/14/2013
60W MOSFET Amplifier
To celebrate the hundredth design posted to this website, and to fulfil
the requests of many correspondents wanting an amplifier more powerful
than the 25W MosFet, a 60 - 90W High Quality power amplifier design is
presented here.
Circuit topology is about the same of the above mentioned amplifier, but
the extremely rugged IRFP240 and IRFP9240 MosFet devices are used as
the output pair, and well renowned high voltage Motorola's transistors
are employed in the preceding stages.
The supply rails voltage was kept prudentially at the rather low value
of and - 40V. For those wishing to experiment, the supply rails
voltage could be raised to and - 50V maximum, allowing the amplifier
to approach the 100W into 8 Ohm target.
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