LTspice is a very powerful simulation tool covering resistors and transistors, as far as modeling and keeping track of their noise contribution. However, you may need an alternative solution for ...

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 amp.

LTspice simulation of the K2-W Vacuum Tube Op Amp’s design reveals the mad science that created a commercial revolution in 1950s and 1960s analog computing.