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From: "Phil Allison"
References: <3FsT9.19037$oS1.firstname.lastname@example.org> <email@example.com>
Subject: Re: Mosfet amp desigh sought
X-Newsreader: Microsoft Outlook Express 5.50.4522.1200
Date: Fri, 10 Jan 2003 23:43:40 +1100
NNTP-Posting-Date: Fri, 10 Jan 2003 23:34:06 EST
Organization: Telstra BigPond Internet Services (http://www.bigpond.com)
"Bill Sloman" wrote in message
> "Jake" wrote in message
> > Apologies if this is a regular query that has been answered before,
> > but.......
> > I'm looking for a good quality mosfet audio power amp design (~100W),
> > PCB layouts and easy to source components preferably.
> > Any pointers greatly appreciated.
> The mosfets might not be a good idea.
> Douglas Self knows what he is doing.
** Maybe he does. However that does not outweigh the enormous amount of
evidence in favour of using Mosfets in audio amplifiers - especially for
the home constructor.
Using either Hitachi or Semelab ( Magnatec) lateral mosfets with
bipolar voltage amp drive stage of very simple topology with remarkably few
parts one can easily produce a power stage with first class audio
performance which is also very rugged and reliable.
To get similar performance from BJTs requires the use of many more
components as well as electronic protection ccts for the output transistors
in case of shorts, overheating and difficult reactive loads.
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