Oct 11

HotFET Pre: J-FET audio preamplifier schematics

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At a first glance there's nothing difficult in building a unity-gain preamp: the well known and fairly simple source follower should do the job. However in my case it turned out to be quite an adventure. Why "HotFET" - please refer to this article.

HotFET-Pre (c) - prototyped in a "networking" case

The design is pretty simplistic. There were many calculations, tests and Continue reading