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April 8, 2008
about 10 years ago
Concerning the isolation of the output ground: I tried using a 600 to 600 ohm audio transformer (Jameco #630459) and it worked well. It provides the isolation needed when one wants to use one power supply for the MP3 and the amplifier.
Does anyone know if feeding the output of the MP3 into the primary of this transformer will do any harm? Should I use a capacitor in series with the primary?
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