[sdiy] tempco resistors

[David Brown]

I didn't do the math but yes, it changed the 
ppm.  I wanted something to drop in and replace 
the 1k87 1% resistor I am currently using.  It 
tracked amazingly well so I figured this would be 
so much closer.  Anyway, I was more showing my 
construction technique.  It would work well for 
the 1K's that Digikey has at such a low price. - Dave

DaveAt 03:12 AM 7/12/2007, Samppa Tolvanen wrote:
>On 7/12/07, David Brown <davebr at earthlink.net> wrote:
>>I made my 1K87 tempco from a Panasonic 3300 ppm 0805 SMT tempco.  I
>>potted it in epoxy and it came out quite well.  They have a
>>reasonable number of values and they are quite inexpensive. Digikey
>>sells them for ~$5 for quantity 10.
>
>But didn't Your mission for "authentic" resistor values - ie. PTC +
>Metal Film composite also bring compensation down to ~ 3180ppm/ °C ?
>:(
>
>Samppa