: Widely considered the gold standard for tube hobbyists. It is free and has a massive community-driven ecosystem of tube models (triodes, pentodes, etc.).
: A specialized, widely recommended tool for designing tube power supplies. It is much faster and simpler to use for this specific task than full SPICE simulators. 3. Advanced & High-Power Simulations
These tools are specifically built for the unique math involved in vacuum tube physics, such as load line calculations and grid behavior. Vacuum Tube Design Software
For engineering beyond simple audio amplifiers, such as microwave or industrial devices, more complex software is required.
: Specifically designed for Single-Ended (SE) amplifier design, focusing on power output and distortion characteristics. : Widely considered the gold standard for tube hobbyists
: A legacy program from GlassWare Audio Design that calculates gain, phase, output impedance, and heat dissipation for dozens of tube circuit types.
: Formerly a paid professional tool, it is now free and includes robust support for vacuum tube simulation, including AC transient analysis. 2. Specialized Tube Design Tools It is much faster and simpler to use
The most common approach is using general-purpose electronic design automation (EDA) software that supports . Since tubes are not always in standard libraries, designers often import third-party models.