[sdiy] LM394 vs. MAT02 vs. ?

[harrybissell]

OTOH you can get monolythic pairs (2SA798, 2SC1583) for less than fifty cents
(USA) each (in 100's) so why match at all ?   Thermal coupling does not get any
better than on the same substrate, matching is almost guaranteed.

I'm paying maybe 10 cents each for 2N390x ... OK so its 2 1/2 times the price...

but what am I saving ?   Add in the epoxy and its probably a wash. And you can't

put a 2SC1583 or 2SA798 into a circuit board backwards :^P

H^) harry

Ken Stone wrote:

> For what it's worth, I had to match some 2N3906's for a project that
> required several pairs. I went though the process of matching them at a
> constant temperature etc. As it turned out, I could have just used the
> "Reach into a bag of 2n3906's.  Pull one out." method, as they all proved to
> be practically identical. Obviously manufacturing tollerances have improved
> somewhat since the bad old days.
>
> Ken
>
> >This is the official ARP method:
> >Reach into a bag of 2n3904's.  Pull one out.
> >Reach into a bag of 2n3906's.  Pull one out.
> >Stick them together.
> >Repeat.
> >
> >-Dana
> _______________________________________________________________________
> Ken Stone   sasami at hotkey.net.au or sasami at cgs.synth.net
> Modular Synth PCBs for sale <http://www.blaze.net.au/~sasami/synth/>
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