[sdiy] Tempco 2k +3350ppm Group buy

[uzs159 at uni-bonn.de]

Hi Harald and all,

HA.Synth at t-online.de schrieb:
> 
> HI,
> 
> I have an new offer!
> 
> 2k +3350ppm Tempco for 4,40 EUR (30pc) delivery time 12 weeks
> 1k +3500ppm Tempco for 3,18 EUR (30pc) delivery time 2 weeks
> 1k +3500ppm Tempco for  2,27 EUR (100pc) delivery time 2 weeks
> Anyone to jump in?
> 
> And here is my problem. Should i go for +3350 ppm? Due to the tolerance of the
> tempcos can i overcompensate? As Ryan says its easier to decrease the TCR
> then to increase. Is +3500ppm good enough or should i take the risk with
> +3350 ppm ?
> Any comments welcome.

I would recommend to go with 3500 as well. Its not difficult to get a 
measurement for the tempco value to figure out a correction. 
(A simple way is using ice-water mixture and boiling water as
temperature references.)
Also it seems not really worthwhile to buy 2k ones if they're
essentially the 
same price as two 1k ones. 

Cheers,
 René