[sdiy] About tempco

[Scott Bernardi]

It should work fine. The tempco tolerances (10%) don't get any worse -
i.e., if you have a 1K @ 3300ppm/C +10% ~ +3600ppm/C, that's a 36ohm
change over 10 degrees. If you have two of them in series both with +10%
tempco tolerance, you get 1K + 36 + 1K + 36 = 2072, or a 72ohm change
for 10 degrees. 72/2000/10 = 3600ppm/C, no difference.  That's worst
case. Best case, the tempco tolerances would be equal but opposite, and
so would cancel, resulting in an "exact" +3300ppm/C.  (that looks right
to me. Real statistical analysis probably involves some weirder math).
These sound VERY interesting to me.

Michael Buchstaller wrote:

> >Would it be possible to get these in 2 kOhm units?
>
> At that price, could it be possible to use 2 if these Tempcos in
> series to get the 2K, or am i missing something here ?
>
> -Michael Buchstaller