Home › Forums › Electronics Restoration › Northern Electric Audio Amplifier info needed

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  • January 22, 2014 at 2:51 pm #5526
    Jason Ingraham
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    Hello Everyone, I have had in my possession for quite some time a microphone/phonograph amplifier model R4048D made in may or 1944. Anyone have any information on it? I’m looking for a schematic.

    Jason VE1PYE

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