There’s a mystique among both audiophiles and musicians about vacuum technology, thus having a tube amp still carries a ... it’s not for audiophiles. The circuit is a pretty conventional ...

It’s a conventional tube amplifier circuit in which the triode is a preamplifier for the pentode power output stage. The pentode is running in class A mode, and the high impedance of its output ...

As a service to our readers, we're providing the LTspice files used in Dr. Dyer's article on simulation of the 12AX7 and the K2-W vacuum-tube ... LTspice schematic of the K2-W op amp in a basic ...

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. The availability of hierarchical blocks ...