Man, time flies, three months have already gone by… This quarter was a pretty productive one – I evaluated many new design tools for tube amp design, in an effort to streamline the process, as well as improving the accuracy of the simulation. While it still has some short-comings, I have managed to narrow it down to three main tools – pctube, MathCAD
The “front-end” is based on the great pctube program by Ayumi Nakabayashi, which is responsible for building tube models, plotting characteristic charts, and some single-stage design work. TINA handles the circuit simulations, and MathCAD is used for symbolic analysis when the time comes for really digging into the math behind the simulations.
One area that still requires more work is TINA, it just does not perform as well as SIMetrix when it comes to transient analysis, so occasionally SIMetrix is still needed to tackle those “tough” simulations. Hopefully, the new release of TINA will make it converge better.
A side benefit to all this effort was the opportunity to bone up on some of the basic math and electrical engineering subjects which I have long forgotten, wish I was twenty years younger, it was so much easier then!