[sdiy] tempcos

[Ian Fritz]

At 12:14 PM 6/14/2004, harrybissell wrote:

>These are 1/6W @ 70C ... I suspect they are really about 1/4W body size
>so
>it should not be too much of a problem.  They have a larger size
>available but
>I didn't get a price on those... maybe I should check those out as
>well...
>
>I think the self heating might be on a par with the tranny pair... and
>I'm one of those
>who uses epoxy to add some mass to the whole system.

The KRL's I've been using are rated at 0.35 W and seem to be fine.  I'd 
worry about going below 1/4 W.  I'm sure the 0.1 W, 805 series SMT present 
a bit of a problem.  As you point out, it depends some on how you mount 
them.  If you pot them up, the self-heating will be more of an issue.  I 
like the components in good thermal contact with each other, but free to 
radiate into draft-free, isothermal environment, as in a metal enclosure.

   Ian