05 October 2007

Synergy - LM3875 Gainclone Amplifier

Mark has been hanging out in the kitchen and has put together the Gainclone amplifier shown below.

LM3875 Gainclone Chip Amplifier
For the enclosure, Mark has used a heavy cast aluminum cooking pan and a massive wooden cutting board. The amplifier is based around the LM3875 chip (power opamp) and uses point-to-point wiring. The amplifier follows the
"rigid and compact" approach of the 47 Laboratory Gaincard amplifier. A rigid enclosure is used to reduce resonance and vibration while a short signal path, feedback loop and minimal parts (compact) are used to preserve information. The schematic of the three resistor amplifier is shown below.

LM3875 Gainclone Chip Amplifier Schematic
Keep cooking Mark, as I look forward to more of your projects. See the project page for full details of Mark's Synergy - LM3875 Gainclone Chip Amplifier Project.

Related DIY Gainclone Projects:
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1 comment:

  1. The idea of the chopping board and cooking pan as enclosure is great! might borrow this concept for my passive "pre-amp" if I ever get around to making it.