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Rola G12 Field Coil Speaker

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  • Rola G12 Field Coil Speaker

    Just playing around with a Rola G12 Field Coil speaker.

    There are four wires coming out of the field coil windings.
    One pair has DC resistance of 1500 ohms the other pair has a resistance of < 1 ohm. They are not connected.

    So the 1500 ohm winding is clearly the field coil. What was the other winding for?

    Internet wisdom says that I need to be running about 12W into the field coil. Anyone know different?

  • #2
    It's a humbucking coil. You need to find a old amp or radio schematic and it will show you how it's wired.

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    • #3
      Read this thread: Antique Radio Forums ? View topic - Identifying Electromagentic Speaker Wires

      Click image for larger version

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      • #4
        Perfect. Thank you all

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