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Path: utzoo!watmath!clyde!cbosgd!ihnp4!houxm!vax135!cornell!uw-beaver!tektronix!hplabs!qantel!dual!lll-lcc!lll-crg!gymble!umcp-cs!cvl!umd5!don
From: don@umd5.UUCP
Newsgroups: net.analog
Subject: Re: Can't get the LM383 to work
Message-ID: <837@umd5.UUCP>
Date: Mon, 20-Jan-86 20:20:35 EST
Article-I.D.: umd5.837
Posted: Mon Jan 20 20:20:35 1986
Date-Received: Thu, 23-Jan-86 20:33:57 EST
References: <2b6f01a2.1de6@apollo.uucp>
Organization: U of Md, CSC, College Park, Md
Lines: 33

> I recently needed about 5 watts of audio in a small space, so I went down
> to the local rat shack and bought a LM383.  It is supposed to put out
> 8 watts or so into a 4 ohm load.
> 
> I wired it up just like the little diagram on the back, but all it does
> is oscillate.
> .
> .
> .
> Does this chip work or not?  Has anyone tried it?  Is there some easier
> way to get 5 watts of audio?  Distortion up to about 1% is not a problem,
> and I have a split supply plus/minus 8 volts.

You say you looked at the National Semiconductor Handbook and you've got
your LM383 hooked-up the same way ??
My Handbook says use a single positive supply, not a split supply...
Futhermore, the Handbook says, ".. the amplifier is unconditionally stable
for all values of closed loop gain ..". Try the single supply -- bet it works!

Enjoy Aural Hedonism !!

-- 
--==---==---==--
"What happened ?"
"It seems the occipital area of my head impacted with the arm of the chair."
"No, I mean, what happened to us ?"
"That has yet to be surmised."

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