LM13600 vs LM13700N

[tomg]

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> From: Edu Silva <edusilva at bahianet.com.br>
> To: Jezz Brookes <jbrookes at bluebear.freeserve.co.uk>; Synth DIY
<synth-diy at mailhost.bpa.nl>
> Subject: Re: LM13600 vs LM13700N
> Date: Sunday, February 21, 1999 11:25 AM
> 
> De: Jezz Brookes <jbrookes at bluebear.freeserve.co.uk>
>  
> > 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?
> 
> You'll need to place a FET before the darlington buffer to raise its
input
> impedance (higher than in the 13600, but not enough). Or you can use an
> opamp follower at the OTA output, bypassing the darlington.
> 
> Edu

I think it's probably ok. I'm going to try it later to see.

-tg