[sdiy] CA3086 - was ARP Pots / Sequencer

[Scott Stites]

Judging from the archives, JH has had pretty good luck with the 3086 in his
Quadra Phaser clone.  I think ARP probably used the CA3086 in some of their
ladder filter designs as well.  Seems like I read somewhere that there were
3086's in the MoogerFooger filters, but I'm not sure IIRC.

Cheers,
Scott

Tim Ressel wrote:

> 
> Folks,
> 
> So I'm wondering if the 3086 would work in, say, the
> ladder phasor circuit??
> 
> --tr
> 
> --- Scott Stites <scottnoanh at peoplepc.com> wrote:
> > 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.
> > > > <a
> >
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> > > 
> > > --
> > >  -Jim
> > > ------------------------------------------------
> > > * Visit:<a
> >
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> > > *-----------------------------------------------
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> > > * April 12, 2003 10am-5pm
> > > * Santa Barbara, CA
> > > * <a
> >
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