[sdiy] Filters, LM13600 etc.

[James Patchell]

RCA did not make the LM13600, that was national semiconductor.  RCA made 
the CA3280 (which is not compatible with the LM13600/13700).

The NE5517 was the signetics part (now called Phillips).

I am not too sure who used the SG prefix.

At 05:26 AM 1/3/2004 +0100, Karl Dalen wrote:
>  --- Ray Wilson <raywilson at comcast.net> skrev: > LM13700s and LM13600 are
>still pretty much a standard item. Try the
> > suppliers on my pages:
>
>I remember that i saw the 13600 in an ad from RCA from the mid seventies!
>Anyway it seams that many manufacturers did their copy of the chip.
>I have in my box here XR13600,LM13600/13700,NJM13600,NE5517,
>CA13600, SG13600, could that be Signetics? Huh!!
>
>KD
>
> > From: "David Reichert" <dreichert at sympatico.ca>
>
> > > Ray,
> > >
> > > I'd like to build a circuit something like this but I'm finding the
> > > LM13700s hard to source. Do you perhaps know of a reliable source?
> > >
> > > Would I be correct in assuming that replacing these ICs with CA3080s
> > and
> > > using simple Op-Amp buffers would be a futile idea?
> > >
> > > Thanks,
> > > Dave
>
>
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         -Jim
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