Potentiometer types

Feb 22, 2006 2 Replies
B

I am trying to establish the different taper types of potentiometers (varistors) that have been commonly available in the past or presently.



This is what I have established so far:



Linear -- no taper aka B-taper (previously called A-taper!) Modified linear -- aka S-taper having an S shaped taper characteristic Clockwise Audio -- log taper aka A-taper (previously called C-taper!) Counter-clockwise Audio -- antilog taper (previously called F-taper) Quasi-log/bilinear -- approximate log taper consisting of two linear sections ?? - type G-taper? ?? - type W-taper?



Is there a definitive reference for these naming conventions for differently specified taper laws?


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P

"Barry"

** Varistors are voltage dependant devices used for transient suppression etc.
** Not very likely, codes varied from maker to maker and country to country.

I have bought reverse log pots made in Australia by IRH labelled "E" - while someYank makers called them " RA" ( reverse audio ? )

The Taiwanese called log pots " D " for decades - Alps label their reverse log pots "RD".

Many UK made pots are labelled with "log" and "lin" .

I just centre the wiper and test the damn things with a DMM if in any doubt.

........ Phil

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B

One point, don't expect any sort of accurate compliance with the specified equation. The relationship can be rough as guts.

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