As George Box observed, “all models are wrong but some are useful”. When it comes to designing with valves, complete accuracy of the anode characteristic curves is generally not critical and so the challenge is obtaining usable models in the first place. By contrast, measuring and modelling real valves so that they can be compared […]

This is obviously an area I have spent some time investigating and I am pleased with the progress with the Valve Designer software as an illustration of the value of such models. However, there remain some challenges that I suspect we have yet to address. What I would love to be able to do is […]