A "stiff" power supply means one that has nearly zero impedance.  That means
that both ends of the pot, for purposes of analysis, are at the same
impedance point (since a power supply can be represented as a pure voltage
source with either a parallel or series resistor equal to the output
impedance). Ahhh, Thevenin and Norton! How I miss them--NOT!!

Doug Hemingway

 Dale Botkin at dale@BOTKIN.ORG wrote on 6/11/02 2:53 PM:

> Hrmm...  not sure I'm with you on that one.  With the wiper centered, your
> input would still see 20K Ohms to either source.  Maybe I'm just slow or
> theory-challenged, but I don't see how two resistors to two different
> sources would qualify as "parallel".  I could be wrong though, here I am
> posting from work again, which results in my being wrong about 3 out of 4
> times it seems.

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