3 ms·

> They're basically the definition of a nonlinear device I don't think this is right. Triodes and pentodes have very linear operating regions. More so than a l

• azalemeth 4y ago
  This is completely true and you're right – smaller triodes and pentodes do have a very linear operating region (Wikipedia has a nice example [1]). I believe, perhaps erroneously, that the larger, high power variants however decidedly have their "foibles" however – an example higher power curve is here [2]. There are plenty of linear operating regions. The trouble is largely that they're not going to have the same gradient! I realise it doesn't matter that much when you've designed the amp, but in practice I have wondered about e.g. 275 µs delay times (at ~50 MHz) that may well be due to amplifier imperfect phase responses away from the frequency they were designed to work. [1] https://en.wikipedia.org/wiki/File:TriodeECC83Characteristic1.png https://en.wikipedia.org/wiki/File:TriodeECC83Characteristic... [2] https://imgur.com/a/D622n2E https://imgur.com/a/D622n2E