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Champ: Single Chip Audio Amplifier PCB [01102941] PCB for the Champ: Single Chip Audio Amplifier. Double-sided PCB with plated through holes, solder mask and silkscreen overlay. 46 x 26mm. Cat No SC0875. Price: AUD $5.00 1  Add to trolley In stock: yes (11 available). Estimated dispatch time: 1-3 days Related to: Project: A Single Chip Audio Amplifier (February 1994 [online issue]) Feature: How To Do Your Own Loudspeaker Measurements (December 2011 [online issue]) Project: Infrasound Detector For Low Frequency Measurements (March 2013 [online issue]) Other items relevant to these projects: A Single Chip Audio Amplifier: The Champ PCB pattern (PDF download) [01102941] (Free) Add to trolley Infrasound Detector For Low Frequency Measurements: Prechamp: 2-Transistor Preamplifier PCB [01107941] ($5.00) Add to trolley