Substitute for 471 Single Op Amp

[davidjnichols]

Hey guys.  I'm going to build the BYOC 250+ distortion and it calls for a 471 single op amp.  I don't have one available and am looking for a substitute.  I heard I could swap it for a NE5534 but may have to add a few caps to it.  Is this true?  I'm new to the science of op amps.  Thanks!

Here's the schematic:  http://buildyourownclone.com/250instructions.pdf

[Lurco]

Hey guys.  I'm going to build the BYOC 250+ distortion and it calls for a 471 single op amp.  I don't have one available and am looking for a substitute.  I heard I could swap it for a NE5534 but may have to add a few caps to it.  Is this true?  I'm new to the science of op amps.  Thanks!

Here's the schematic:  http://buildyourownclone.com/250instructions.pdf

Try a 741 maybe?

[garcho]

Yeah, pretty much any single op amp DIP will have the same pinout. FET vs BJT might change things though. Maybe try a TL071.

[PRR]

741 not 471

741 used to be the Ford of the opamp world; however it's gone out of style.

TL071 would be the simplest drop-in.

'308 is much-loved in a circuit like that, but it too is old and out of style, have to hunt in pedal-supply places like Small Bear.

[EATyourGuitar]

I purchased 45 of these genuine texas instruments UA741CP at $1 each to go with the distortion plus plus plus PCB's I designed but then someone told me mouser still has them at $0.29. a $30 mistake on my part. don't fear the 741. 741 is a horrible part compared to modern opamps so I like it a lot in dirtortion pedals and noise generators.

[Gus]

That circuit works better with a 741.  This is because of the gainbandwidth product when the circuit is set to higher gain.

http://en.wikipedia.org/wiki/Gain%E2%80%93bandwidth_product

[zombiwoof]

I have read that the 741 was one of the first opamps around, and although it's specs are not as good as modern IC's, in order to get the true sound of the vintage OD250's and Distortion+ pedals it is the one to use.  If you are modding a recent DOD OD250 (which use half of a 4558), you can drop in a 1448 without rewiring, it is like a dual version of the 741.  A well-known modder of recent DOD OD250's uses the 741 (which requires rewiring) for the full vintage mod, and the 1448 for a simpler mod that is said sounds quite close to the original.

If you are building your own 250 from a kit, I'd use the 741 if you want the vintage sound, although other single opamps could be subbed.  DOD ads a small cap to the 4558 to attempt to make it sound less "hi-fi" and more like a 741.  I don't know why they didn't just use a 1448 if they were going to do that, but maybe it's a cost-cutting thing.

Al

[garcho]

There is such a thing as an OP471, just sayin'.

[zombiwoof]

There is such a thing as an OP471, just sayin'.

Yes, but the OP is building a kit that can be made into either a DOD OD250 or Distortion+ (they are similar circuits), and the IC used in those was the 741.
Al

[Mark Hammer]

Many who have tinkered with it have remarked that, even without the clipping diodes, it is very difficult for the thing to ever get clean.  As such, that makes it a bit of a "double clipper".  Using a "better" op-amp would pretty much deprive you of the inherent qualities of the original.  On the other hand, if you're not all that attached to authenticity, and just want something that sounds interesting, use whatever the heck you want, as long as it shares the same pinout.

[gjcamann]

From the TI datasheet: http://www.mouser.com/ds/2/282/snosc25b-30772.pdf
The LM741 series are general purpose operational amplifiers which feature improved performance over industry
standards like the LM709. They are direct, plug-in replacements for the 709C, LM201, MC1439 and 748 in most
applications.
Maybe you could try one of those.

[Mark Hammer]

It's not like there is any shortage of them, or as if they go for Burr-Brown prices.  However, if you are having a difficult time finding them locally, consider using half a 1458.

[R.G.]

I remembered what it was flitting around in the back of my head. Electronic Goldmine has Motorola MC1741's for $0.49 each through tomorrow. That's Moto's house number for the 741.