Hi all, long time lurker, occasional poster - always busy (you know how it is).
Anyway, I've built two different LM386 projects over the past couple of years and both worked, though motorboated with the volume up at any sensible volume.
Adding insane amounts of filtering to the supply helps, but not by much. I've tried 9v and 18v, batteries and mains power supplies - seems to make no difference.
This is just a small little amp for listening to some tunes while I'm in the car (my car stereo is f*cked).
I've added a single-transistor preamp before the LM386 to boost the signal on my most recent version, just a BC184/3 (can't remember which, just an NPN silicon, nothing special).
Anyone else had problems building these things?
Also tried the '1' and '4' suffix LM386s, no difference (the higher suffix just handles more voltage, 20v max).