Investigation: Are Log Potentiometers really Logarithmic?

Wikipedia says that modern (cheap) log potentiometers aren't actually logarithmic at all, but constructed with separate sections of fixed resistance tracks. Time for an investigation.

ETI Vocoder constructional project reproduced with permission from Wimborne Publishing Ltd. http://www.epemag.com

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http://en.wikipedia.org/wiki/Potentiometer

http://www.geofex.com/article_folders/potsecrets/potscret.htm ... https://www.youtube.com/watch?v=q1lbDai6ObA