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  • July 23, 2009 at 4:19 pm #78642
    radiator
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    Re Electro-Harmonix 12AY7 tube pre-amp
    Could anyone help with an oddball application? I have an ultrasonic transducer (Polaroid 6500) that’s simply the guts of a condenser microphone without electrical components.
    The 12AY7 looks the perfect interface as the transducer needs a 200volt bias. The objective is to view the captured sounds of 10Khz – 80KHz on a laptop through an A/D USB converter.
    Does anyone have a circuit showing the electrical hook-up to say a condenser microphone?
    Thank you.

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