Posted in classic hacks Tagged 2P29L, 2SH27L, amp, amplifier, heater, low power, low voltage, tube, vacuum tube ← ChatGPT Powers A Different Kind Of Logic Analyzer Building The OhSillyScope → ...

When we talk about audio amplifier tubes, we’re normally talking about the glass little blobby things you might find in a guitar amplifier. We’re not normally talking about big ol&#8217… ...

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.

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.

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 ...

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.

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 ...

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.