Forbes contributors publish independent expert analyses and insights. Technology journalist specializing in audio, computing and Apple Macs. Probably one of the most celebrated amplifiers ever ...

The most recent installment of [Dino Segovis’] Hack a Week covers the construction of a simple NPN transistor audio preamp. Some time ago, he built a small audio amplifier using an LM386 which worked ...

Members can download the PDF ebook. One day, back about 1966, I was going up the elevator at 285 Columbus Avenue in Boston to look at some production problems on Philbrick’s fifth floor. And who was ...

Over the recent weeks here at Hackaday, we’ve been taking a look at the humble transistor. In a series whose impetus came from a friend musing upon his students arriving with highly developed ...

The circuit consists of preamplifier, tone controls, and regulated DC power supply, while providing a power output of 18 Watts for 8 Ohm load and 30 Watts for 4 Ohms load. BC550 – an NPN general ...

Trends Audio introduced the PA-10.1D Tube Headphone/Pre Amplifier. It provides all functions of headphone amplifier and pre amplifier as well have fun tube rolling. New Trends PA-10.1D includes a ...