[sdiy] DIP LM13700 discontinuation

Mike Bryant mbryant at futurehorizons.com
Fri May 28 12:14:32 CEST 2021

And 5532s for the output amps.  TL072s aren't so good there.

I've been asked why we don't just use 5532s everywhere.  Simple - the mixer would be so hot you'd need several extra fans which rather messes up the signal to noise ratio for the guy doing the mixing.  
And in fact for the mic amp the distortion is slightly worse than with a TL072 as it loads the input pair more.

-----Original Message-----
From: Synth-diy [mailto:synth-diy-bounces at synth-diy.org] On Behalf Of Neil Johnson via Synth-diy
Sent: 28 May 2021 10:37
To: Synth-diy
Subject: Re: [sdiy] DIP LM13700 discontinuation

For what they cost they're pretty good opamps, and suitable for many applications.  Sure, they're not the lowest noise, or distortion, or offset, or drift, or power consumption, but they are incredibly cheap (but not too cheap!).  For general use they're hard to beat.

Typical mixing desk these days is TL072 for all but high-gain blocks, where it's either transistors as the gain elements (mic pre) or 5532 or 5534 for the sum amps.

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