Vacuum-Tube Valves Circuits

  

Circuits


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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...

Each circuit of our test unit features two 12AT7 tubes supplementing the gain stages and two 12AU7 tubes acting as cathode followers—from which this preamp gets its CF designate. According to AVA, ...

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 ... Having a second 12au7, I built a second Valve Caster ...

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...

With only a few inexpensive parts and a simple circuit, this should be an easy first-time tube project! I didn't use a video cam mic, so the "youtube" audio is halfway-decent quality. But the mp3 f...