[sdiy] CA3280 sources -- Re: CA3080 - what to do?

[Ray Wilson]

Hi All

This is regarding the fervor to find 3080's and 3280's. Beside the situation
where you need to replace a chip in a piece of existing equipment, what
advantages do these chips have over the readily available LM13700 in new
designs. No flames please I'm really just curious.

Ray

----- Original Message ----- 
From: "john mahoney" <jmahoney at gate.net>
To: <synth-diy at dropmix.xs4all.nl>
Sent: Monday, August 16, 2004 10:00 AM
Subject: [sdiy] CA3280 sources -- Re: CA3080 - what to do?


> As Don knows, I've recently gone 3280 hunting. Sources for the CA3280 are
> fairly limited -- Intersil lists only Arrow and Avnet. You won't find them
> listed at Mouser, Jameco, or Digikey, and forget about the surplus
vendors.
> Here's what I found:
>
> Arrow lists them for $4.03 each, but with a 6 week lead time.
> http://www.arrow.com/
> Avnet sells them for $3.636, but the minimum order quantity is 500.
> http://www.em.avnet.com/
> Newark sells them, but see below.
>
> The best sources are:
> Small Bear Electronics, at $3.95 each. http://www.smallbearelec.com
> And finally, Jim Patchell is (was) letting some go for $4 each, "which is
> better than the 100 piece price from Newark." I'll bet his shipping &
> handling fee is less than Small Bear's. ;-)
> --
> john
>
>
> ----- Original Message ----- 
> From: "Don Tillman" <don at till.com>
> To: "Fredrik Carlqvist" <ifrc at iar.se>
> Cc: <synth-diy at dropmix.xs4all.nl>
> Sent: Monday, August 16, 2004 11:26 AM
> Subject: Re: [sdiy] CA3080 - what to do?
>
>
> >    > From: "Fredrik Carlqvist" <ifrc at iar.se>
> >    > Date: Mon, 16 Aug 2004 10:32:53 +0200
> >    >
> >    > I use a lot of CA3080. It is my favorite OTA. Now I hear Intersil
> >    > will cancel them. Are there any other producers of CA3080 or
> >    > similar OTA's out there? Or should I now buy 1000 CA3080?
> >
> > Use a CA3280.  It's a much better chip, it has a great distortion
> > compensation circuit, it has a nice noise spec (while the CA3080 has
> > no noise spec), and it comes in pairs.
> >
> >   -- Don
> >
> > -- 
> > Don Tillman
> > Palo Alto, California
> > don at till.com
> > http://www.till.com
> >
>