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Old 28th January 2020 | Show parent
Originally Posted by blanneau ➡️
Peaked my curiosity, due to my ignorance, so I Googled and found this:
The common 12AX7A has a 12v/us slew rate, similar to a TI TLO72 opamp. Driver tubes like 12BH7 are slower. 12AY7's are faster due to less stray capacitance.

Some rf tubes are very fast but not suitable for audio usage. Transistor designs here go up to 7000V/us slew rate, that is very fast.

Transistors are faster than tubes.