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From: lagasse@biomed.UUCP (Robert C. Lagasse)
Newsgroups: net.analog
Subject: LM383
Message-ID: <150@biomed.UUCP>
Date: Tue, 4-Feb-86 11:12:37 EST
Article-I.D.: biomed.150
Posted: Tue Feb  4 11:12:37 1986
Date-Received: Fri, 7-Feb-86 08:36:22 EST
Organization: Mass. Gen. Hosp. - Dept. Biomed. Engineering
Lines: 15

To Larry Lipman (and anyone else interested).  The LM383 works great! BUT,
you have to mount the small value capacitor or capacitors, (I forget how
many are used) RIGHT UP TO THE CHIP BODY, soldered where the leads enter the
chip with AS SHORT LEADS as possible.  The big electrolytic series capacitor
is no big deal for where it is placed or wired.  You also must have a power
supply capable of delivering great instantaneous current (like a car
battery).  The audio quality is quite good and there is PLENTY of it.  I ran
across the same problems you did when I first tried the chip and initially
brought the first one back to the store thinking I had a bad one.  One other
thing , I believe the chip has an automatic thermal shutdown. If it gets too
hot, the chip just dies and you have to wait for a cooldown.  This chip also
needs a hefty chunk of metal as a heat sink, or it will shutdown within
seconds of operation to protect itself.   Yes.......its all coming back now.
(I haven't played with this chip in a few years)
Bob Lagasse @ Mass. General Hospital