[sdiy] Hmmm...OK NOW you can panic :(

[Don Tillman]

   > Date: Sun, 26 Sep 2004 22:10:34 -0700
   > From: Oren Leavitt <oleavitt at ix.netcom.com>
   > 
   > Fooey...Back to handcrafted discrete transistor gain cells.

Just use a CA3280.  It's readily available, it's a far superior chip,
lower noise, distortion compensation, improved current mirrors, you
get two per package, and while it's more expensive than the CA3080,
it's significantly cheaper than a discrete transistor version.

   > Date: Mon, 27 Sep 2004 10:20:53 +0200 (CEST)
   > From: Rainer Buchty <rainer at buchty.net>
   > 
   > Actually, I'm wondering. People alone on this list stock a 100
   > here, 150 there. So after all it might be even worth the hassle
   > to get those chips manufactured especially for the crowd here and
   > on AH.

It's far easier to just use the CA3280.

   > Date: Tue, 28 Sep 2004 15:33:27 -0400 (EDT)
   > From: Tony Clark <clark at andrews.edu>
   > 
   > Well this officially sucks.  Now if only I could find a
   > "life-time" buy of those elusive 3080M's.  I bought up a bunch a
   > while back when I knew supply was getting limited, but this
   > throws a HUGE monkey wrench into any future designs I make...
   >
   > Anyone got a good discrete or semi-discrete OTA design they'd be
   > willing to share?  Evidently it's time to get re-aquainted with
   > the breadboard and the 3080 schematic...

CA3280.  Really.  

  -- Don

-- 
Don Tillman
Palo Alto, California
don at till.com
http://www.till.com