wrote:

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I have always known pots to either have an audio or a linear taper.


** Tube radios and TVs using carbon track pots used either linear "lin" OR logarithmic "log" taper pots. The log pot would always be for volume.

Log pots had a very gradual rate of increase in resistance as you turned it clockwise.

Audio taper pots arrived with hi-fi amplifiers and gave a quicker rise in volume than a log type, so was preferred by many makers and also guitar amp makers.

The code letters used varied alarmingly, A originally meant linear and C =log. Pots coming from Asia used A = audio taper with B = linear and D = log.

The code letter "E" referred to a "reverse log" pot, useful in instrumentation where the actual gain of a amplification stage must be varied smoothly.

Strangely, I have not come across a reverse linear pot anywhere.


..... Phil