[sdiy] Op amp selection help

[Jay Schwichtenberg]

While we're talking about op-amps maybe someone might know of of a couple of
parts I'm looking for.

First does anyone know of a LT1013 sub or better that comes in a standard
SOIC 8 parckage? It's going to be used in a VCO expo converter so good temp
specs, offset and DC specs are needed. For some reason the LT1013 SOIC 8
comes in a 'non-standard pin out' and I want to do a board that can take
good (expensive)parts and cheap parts.

Next is there a single LM319 type comparitor in a SOIC 8 package that anyone
knows about? Want to use this as a fast reset comparitor for a VCO. There
are options that I could use here, either a  311 or 393.

Thanks in advance, this will save me a few hours of research.
Jay S.

> -----Original Message-----
> From: owner-synth-diy at dropmix.xs4all.nl
> [mailto:owner-synth-diy at dropmix.xs4all.nl]On Behalf Of Paul Higgins
> Sent: Friday, September 03, 2004 6:15 PM
> To: synth-DIY
> Subject: Re: [sdiy] Op amp notes
>
>
> I know this has been on the list before in some other incarnation, but
> I've never seen it asked in this way.
>
> What are people using for opamps:
> 1) in general purpose high-level audio circuits (e.g. EQs, summing
> amps)?
> 2) in critical low-level audio circuits (e.g. mic preamps, guitar
> pre-preamps/boosters)?
> 3) in CV-type circuits?
>
> Also, are the low-offset opamps worth it (for CV applications), or are
> the parts specified in so many of the classic designs still basically
> good enough?
>
> I know that some folks are partial to those opamps used all over the
> Mackies (NJR4560/4580?).  I've used an OP-27 a couple times for guitar
> pre-preamp designs, along with a FET for isolation (the pre-preamp
> mounting right in the guitar).  And years ago I saw a mod for one of
> the cheesy PAIA tube preamps (yeah, I'll admit I own one too) that
> replaced the 5532s with OPA-2604s, I think.  I never tried it, so I
> can't comment on whether the mod was worth doing.  (The mod was
> extensive and swapped out a lot of other things in the circuit as well.
>   Last I checked, it had disappeared from the net).
>
> -PRH
>