[sdiy] Chip Tempcos was RE: Solder paste and toaster ovens

[Harry Bissell Jr]

If I had to use the chip tempco, I'd epoxy it to the
bottom of the can, then solder teeny-tiny flying leads
to it (maybe 28ga) so that the leads don't transfer
heat FROM the board.

I like the combination of chip tempco mounted above
chip transistor... I have not tried it but it
looks effective. Someone on list does this, maybe it
was Juergen Bergfors, or was it YOU, Tony ???

H^) harry



--- Tony Clark <clark at andrews.edu> wrote:
> > Hmmmm..might work.  but at that point I might as
> well use a leaded tempco
> > (holes are there for that if I need to use one)
> and then just wrap that
> > around the transistor can.  I'm trying to get the
> tempco in contact with the
> > base of the tranny as opposed to the top.
> 
>    I don't know if anyone has done any measuring (I
> certainly haven't), 
> but using a chip tempco probably follows the PCB
> temp very closely (after 
> all it's small and is pretty much in direct contact
> with it.  So I would 
> think that having  the tranny glued to the PCB in
> relative proximity 
> might be just as effective.
>    The only drawback, I guess is if you have any
> tranny self-heating, 
> which you would then want to transfer to the
> tempco...
>    Any thoughts?
> 
>    Cheers,
> 
>    Tony
> 
>
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