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Re: VLF/LF converter?

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  • drmail377
    Yo Jim, Use an electret mic for an antenna - maybe you ll get a way-cool SDBD (Software Defined Bat Detector). But you may have to reduce the sound card
    Message 1 of 2 , Aug 29, 2008
      Yo Jim, Use an electret mic for an antenna - maybe you'll get a
      way-cool "SDBD" (Software Defined Bat Detector). But you may have to
      reduce the sound card sample rate though.

      Anyway... Why not just receive VLF directly with a Softrock receiver?
      Clock the softrock with a multivibrator and swap the passive HF input
      filter with a low-noise op-amp VLF active filter.

      73's Dave

      --- In softrock40@yahoogroups.com, "Jim Miller" <jim@...> wrote:
      >
      >
      http://www.cliftonlaboratories.com/jackson_harbor_press_vlf_converter.htm
      >
      > this might be interesting to hook up to a 10Mhz softrock equipped
      with a
      > si570 and a copy of Rocky, et.al.
      >
      > 73
      >
      > jim ab3cv
      >
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