[sdiy] LM741 substitute

[Kyle Stephens]

Ken Stone's wavetable uses a 741 on the summing amp out - the low slew helps smooth the 8-bit output.

http://www.cgs.synth.net/modules/wavetable.html

The MXR Distortion+ uses a 741 as well - again, the limited slew helps makes for the whole 'classic' sound. Other older pedals are liable to use them too, if only because that was what was available then, less any for an intended effect.

http://www.freeinfosociety.com/electronics/schemview.php?id=562


Again though, these are rare (eh, maybe just 'infrequent' when it comes to old school FX), esoteric cases.


_Kyle

--- On Fri, 7/10/09, Aaron Lanterman <lanterma at ece.gatech.edu> wrote:

> From: Aaron Lanterman <lanterma at ece.gatech.edu>
> Subject: Re: [sdiy] LM741 substitute
> To: "sdiy diy" <synth-diy at dropmix.xs4all.nl>
> Date: Friday, July 10, 2009, 9:43 AM
> 
> On Jul 10, 2009, at 10:41 AM, Tom Wiltshire wrote:
> 
> >  expect you mean TL071. The other is a dual, and
> the pinout is quite different.
> > 
> > As long as the pinouts are the same, most op-amps are
> very forgiving. You can mostly swap op-amps for a "better"
> one (lower noise, lower power consumption, whatever) without
> any problems. Obviously there are a few rare circuits where
> a particular part is critical, but I've never seen one.
> 
> I recall someone - maybe it was Ian Fritz, can't really
> recall for sure now - mentioning some circuits where the
> slow slew of the cruddy op amp was important to maintain.
> 
> These situations do seem rare, though.
> 
> - Aaron
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