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Vacuum-Tube Valves Circuits

  

Circuits




With four preamps in the current AVA lineup, I welcomed the opportunity to test its flagship, the Fet Valve CF hybrid preamplifier. Each circuit of our test unit features two 12AT7 tubes supplement...

Power-supply voltage is provided by full wave diode rectification of 230 VAC by a magnetic transformer. This design provides a quality audio amplifier. Valve amplifier circuit diagram. Valve (Vacuu...

I am speaking more of audio vacuum tube amps than I am of microwave amps like magnetrons, klystrons, TWTs and the like. ... This is a serious design book with details on audio circuit design, equat...

Andreas is one of the brightest new lights in the firmament of vacuum tube circuit design, and I was particularly impressed with his New Valve Order Audio SPA-II (Stereo Phono Amplifier-II) that co...

This project uses a very interesting mode of operation of the vacuum tube, "starved cathode". Instead of running the tubes at a few hundred volts on ... of "natural tube distortion" and some overdr...

It's always a pleasure for me to introduce to the readers of Positive Feedback Online a talented fine audio constructeur, this time Andreas Hadjiminas, working out of Nicosia, Cyprus. Andreas does ...


6V6 6J5 Class A Vacuum Tube (Valve) Power Amplifier Circuit


Single Vacuum Tube Radio with Circuit Diagam (Operates on a 12v to 25v HT/LT ...


Audio Amplifier & Radio Valve (Vacuum Tube) Tester - unboxing


How Tube Amplifiers Work, Part 1: The Power Supply