[sdiy] CA3086 - was ARP Pots / Sequencer

[Scott Stites]

Hi Jim,

Ah yes, it's all coming back to me.  A while back, I made some 'big buys' (well,
big for me) of common chips I'd need.  At the time, I couldn't remember which IC
had the spec'ed transistor pair - so I guessed 3086 when I clicked the order in. 
50% chance of being wrong, and wrong I was.  Should have stopped and checked a
spec sheet.  And I believe the 3046 was the same price, if not a little cheaper. 
Sigh.

But, as you say, it means it's not tested, not necessarily that it won't perform
to the spec. I figure where the transistor matching spec is critical, I can drop
in a 3046, then try a 3086 or two, and if there's no discernable difference, I
can use one of the many 3086's that I have instead of the 3046, of which I have
few.  

That was interesting information about the CA3045, BTW!

Best Regards,
Scott



On Thu, 06 Mar 2003, patchell wrote:

>     No worries here...The CA3086 is just an untested version of the CA3046 (the
> CA3046 is speced for VBE matching), and the CA3046 seems to still be widely
> available.  So, if you need a CA3086, take a look at the CA3046, and buy which
> ever
> is cheaper...I have seen the CA3086 sell for more than the CA3046 at some
> places...and by the way, the CA3045 is the same as the CA3046 but in a Mil temp
> range
> (and ceramic package), although, you don't see that one much at all any more.
> 
> Scott Stites wrote:
> 
> > Tim Parkhurst wrote:
> >
> > <snip>
> >
> > >Also, the CA3086 transistor array ($5.18) and the MC1452 multivibrator
($3.42)
> > >are surprisingly expensive. I think these could be replaced to save a few
> > >bucks.  Of course, these are new parts. If you could use surplus or had a
good
> > >junk > box to draw from, you could save quite a few bucks.
> >
> > <un-snip>
> >
> > Not that it would make a decisive improvement on the sequencer BOM cost, but
> > Jameco has the CA3086 for $0.49, $0.45 for 10 and $0.39 for quantities of a
100
> > or more.  That means you could get a hundred of them for less than what you'd
> pay
> > for 8 of the NTE replacements at Mouser, which is where I'm assuming the $5.18
> > figure comes from.
> >
> > And just wondering....why does the NTE replacement come up at Mouser for a
> CA3086
> > search?  Is the CA3086 getting harder to come by?  Does anybody know?
> >
> > Cheers,
> > Scott
> >
> > ________________________________________________
> > PeoplePC:  It's for people. And it's just smart.
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href="http://mail.peoplepc.com/jump/http://www.peoplepc.com">http://www.peoplepc.com</a>
> 
> --
>  -Jim
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