Previously Featured Builds

build

Allan Flores

Allan Flores

Dear Mr. Pass, I would like to share some pictures of my Zen v4. I started this project more than… More...
build

Robert(a75-p12)

Robert

It is not too exciting to look at, but maybe the story of its construction is worth reading. I built… More...

Amp Camp Project — Pass DIY / 2016

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A75 Part 1 — Norman Thagard & Nelson Pass / 1992

READERS' REQUESTS FOR more power are reasonable, but not interesting enough to justify another article. Hanging some output transistors on the original and beefing up the power supply is best left as an exercise to the reader. While the A75 delivers more power, particularly into low-impedance loads, that is not the primary goal of this project. We wish to introduce more advanced concepts in amplifier design, including balanced inputs, dual differential inputs, true DC response, cascode and folded cascode operation, tiered and regulated supplies, operation with and without feedback, and details of designing with the new generation of power MOSFETS.… More...

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