LM13600 vs LM13700N

[tomg]

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> From: Jezz Brookes <jbrookes at bluebear.freeserve.co.uk>
> To: Synth DIY <synth-diy at mailhost.bpa.nl>
> Subject: LM13600 vs LM13700N
> Date: Sunday, February 21, 1999 9:50 AM
> 
> Having a tidy up the other day I stumbled across a tube of 24 x LM13700N.
> Lucky me! Is the LM13700N a drop in replacement for the LM13600N in VCO
> applications? In particular I'm thinking of the VCO in Tom's cookbook,
the
> VCO5 I think. (I'm downloading the data sheets for both at the moment but
I
> seem to have a very slow link.)
> 
> Jezz

I built this one straight out of Nationals app notes. They show the same
circuit for both devices, as a matter of fact the app notes are pretty much
all the same. I haven't tried subbing one for the other in the vco designs,
however I don't see any reason why not. I think you could build it out of
3080s and fet followers in a pinch. I did swap 700s for 600s in the mouse
while I was compiling the parts list checking vcf and vca functions and saw
no difference at all. I'll swap them out later in a vco and see for sure. I
would bet it's ok.
-tg