For the electronics enthusiast a tube audio amplifier makes for an interesting and unusual project, and for that reason it’s one tackled by many. [Keri Szafir] is no exception, and she’s ...

With the wealth of cheap and highly integrated audio amplifier modules on the market ... Especially when those parts include vacuum tubes, and doubly so when you make the vacuum tubes from scratch ...

Vacuum tubes: They’ve been with us since the early ... The LTspice schematic of the K2-W op amp in a basic inverting configuration incorporates the symbol created for the K2-W model.

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 op ... of the K2-W op amp in a basic inverting ...