We may have seen other homemade vacuum tubes before — we even recently featured a DIY X-ray tube — but there’s something about [jdflyback]’s tubes that really gets us going.

The schematic shows one channel of a stereo amplifier, and the power supply is sufficient for both channels. Transformer T2 supplies the voltages required for the vacuum tube plates. Selection of the ...

OK, now it’s time to tie yet another knot in your now-pretzeled brain… LTSPICE schematic of the K2-W Analog Computer Op Amp’s first stage. Look carefully at that second triode circuit.

When faced with cheap electronics of course I’m tempted to buy some, so I parted with about £10 ($12.50) and bought myself a kit for a two-tube device described as a stereo preamplifier and ...

A replacement set costs $120 from Solo, or about half that from a tube supplier like New Sensor (800-633- 5477). With the SE-40, Lau has met high- end designers on their own turf.

Japanese designer Koichi Futatsumata, founder of Case-Real studio, has designed a vacuum tube amplifier for electronics manufacturer Elekit. Elekit traditionally manufacture affordable, high-end ...

Not only is the ST-70 regarded as one of the most popular tube amplifiers of all time, it’s still widely sought after by vintage-audio enthusiasts. The Dynaco Stereo 70 was produced from 1959 to 1977.

Tube amps, however, need a few minutes before they can offer their optimal sound quality and tonal character. This is because vacuum tubes operate well after they reach a certain temperature.

Feast your eyes on this neat new duo. Following in the footsteps of McIntosh’s retro-styled MA252 and MA352 integrated amplifiers, (which themselves took design cues from the MC275 Vacuum Tube ...