A small DIY LM3886 Chip Amplifier

[bill poster]

Re: A small DIY LM3886 Chip Amplifier

I bought a $7 Y148 chip amp a couple of years back and was surprised how good it sounded!

[donradick]

Re: A small DIY LM3886 Chip Amplifier

Thanks Don. I like beefy PSU's and heat sinks. I see so many of the gainclones with really flimsy heat sinks. Some with just a strip of AL. I just don't get it. I want my amps to survive the nuclear holocaust....

I'd read a few reports of some GC builders who had amps that ran hot at idle, so I used some big heatsinks on mine.



Figured out later that the output "Zobel" was a LP at about 40 KHz, and prevented ultrasonic oscillation.
Some guys thought that they didn't need it....

[JRT]

Re: A small DIY LM3886 Chip Amplifier

I'd read a few reports of some GC builders who had amps that ran hot at idle, so I used some big heatsinks on mine.

[ATTACH=CONFIG]58303[/ATTACH]

Figured out later that the output "Zobel" was a LP at about 40 KHz, and prevented ultrasonic oscillation.
Some guys thought that they didn't need it....

Yes... Too many of the so-called "gainclone" designs have followed the minimalist path taken by Kimura-San in his design of the 47 Laboratory Gaincard, which was little more than LM3875 in a minimalist design that eschewed useful protection circuits.