Hmm. Did you build it straight from the app notes, or some other schematic?
Can you point us to the schematic you used, somewhere on the web? The hiss
might be from lack of a true ground...
I'm new to the world of electronics myself. I have successfully built an
LM386 amp, though....I think I used a mish mash of app notes and general
opamp theory to come up with my schematic, and I didn't get any hum or
oscillation. I *did* get nasty clipping artifacts when I turned up the
volume on my guitar :)
I built it in an empty 10-pack diskette box, BTW. They make rather
convenient small project boxes.
-Darren
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----- Original Message -----
From: "Dominic Rivron" <karen.rivron@...>
To: <Electronics_101@...>
Sent: Monday, April 16, 2001 6:55 PM
Subject: [Electronics_101] LM386 amp
I've just built an audio amplifier using an LM386, and found that though
it amplifies, there is an annoying level of backgound hiss, irrespective
of the volume setting or input. Also, it tends to oscillate at full
volume. Can anyone offer any suggestions?
regards
Dominic Rivron
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