The stainless steel tube amp is a functioning prototype, but may eventually be put in limited production. Glówka is a graduate of the Industrial Design department at the Academy of Fine Arts in ...

It’s not every day we see the results of someone putting their own spin on a vintage tube amp, but that’s exactly what [lens42] did in creating the McIntosh 217, created as a “mini ...

This amp design uses a plate voltage of 12, although the 12AU7 can handle up to about 330. Since the 12AU7 is of the Twin Triode variety, one tube can be used to amplify both a left and right ...

And this is a fresh for 2025 amplifier; it has a buffered effects loop to accommodate your pedalboard. Revv has a lot of fire-breathing high-gain metal amps in its lineup. The D25 is one of its more ...

The VPI 299D tube integrated amp VPI I think the 16-by-15-by-7-inch amplifier is simply gorgeous. The "champagne" hued faceplate and the silky feel of the controls harken back to the glory days of ...

The K2-W vacuum-tube op amp has an LTspice-simulated open loop gain of 27,000. The modeled K2-W input impedance is >100 MΩ. The LTspice modeled result shows 1.00 nA of input current.

After a brief review of the history of the K2-W vacuum-tube op amp, an LTspice model is used to create its schematic in preparation for SPICE simulation.