Morgan Jones did a review of a vacuum tube curve tracer, in a recent Linear Audio magazine. As luck would have it, that article is one of the few that are available for purchase individually: (link). Jones was very enthusiastic about this curve tracer, as I recall.
You might consider reading Morgan Jones's article, then possibly buying one of these curve tracers for yourself -- or finding four other people who all want a tube curve tracer, and each paying 20% of the purchase price. The web page says "More than 400 uTracers in operation in more than 40 countries."
(Here is the site) and the price appears to be € 225.
You might consider reading Morgan Jones's article, then possibly buying one of these curve tracers for yourself -- or finding four other people who all want a tube curve tracer, and each paying 20% of the purchase price. The web page says "More than 400 uTracers in operation in more than 40 countries."
(Here is the site) and the price appears to be € 225.
I'm building one uTracer myself, bought from Ronal in Holland
The uTracer, a miniature Tube Curve Tracer / Tester.
He's very helpful and sells around the world.
If you want to model tubes with kinks, i.e. tetrodes -- you have to reinvent, somewhat, the phenomenological models.
I use Eurequa.
Me thinks you just take apart the equations from Eurequa (or any solver) and try to tease out the physics.
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