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RE: Slew Rate

The slew-rate of a tube is usually limited by the geometry and dimensions of the grid. The thinner the grid is, the faster the tube. Also, the plate material and plating can have an effect. My understanding is that the grid ultimately limits the HF response in most tubes. If you get a Siemens CCA grey-plate (6922), this has an extended response to probably 50kHz, but it is the exception. It was a limited build binned version of the best of the best.

I have compared this to other tubes in the output of a DAC, where there is only capacitive coupling, no transformers. The caps were tin/Teflon.


Edits: 04/25/14
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  • RE: Slew Rate - audioengr 11:07:21 04/25/14 (0)
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