[sdiy] Tempcos (was:SSM2044 Filter schematic??)

[ASSI]

On Friday 21 May 2004 01:29, Paul Perry wrote:
> harrybissell said:
> >'might' as well.  These are usually +3000 ppm or +3500 ppm... and a
> > lot less expensive
>
> Copper wire has a tempco of 3800 to 3900 ppm, I believe, if people
> want to 'roll their own' :D

The tables I have all show 3900ppm for copper and platinum, 4100ppm for 
silver, 4800ppm for tungsten and 3600ppm for AlMgSi ("Aldrey"). 
CuZn15...30 alloy come in at 1800ppm, other alloys with up to 2400ppm 
are also available, but probably not as wire.

If all you need is a 3350ppm reference voltage, you can also try a 
Z-Diode around 9.6V.


Achim.
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