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Phil Allison[_3_] Phil Allison[_3_] is offline
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Default Taper of Potentiometers

Clifford Heath wrote:


Hah! Square-root taper

** Is that what it's called ?

No idea what it's called, but if a log pot can be
called that (even though the intended operation is
exponential, i.e. opposite of log, to compensate
for the log response of the ear) then this should
be square-root, because the actual curve is the
square function.

** At least one source calls it a "square law attenuator" or SLA.

A SLA closely follows the formula:

Gain = 40log(position ratio) where closed =0 and open =1

..... Phil