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A small DIY LM3886 Chip Amplifier

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  • #16
    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!

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    • #17
      Re: A small DIY LM3886 Chip Amplifier

      Originally posted by tc View Post
      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.

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      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....

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      • #18
        Re: A small DIY LM3886 Chip Amplifier

        Originally posted by donradick View Post
        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.
        "Our Nation’s interests are best served by fostering a peaceful global system comprised
        of interdependent networks of trade, finance, information, law, people and governance."
        - from the October 2007 U.S. Naval capstone doctrine
        A Cooperative Strategy for 21st Century Seapower
        (a lofty notion since removed in the March 2015 revision)

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