Gyraf G7 Tube Microphone

Projects > Gyraf G7 Tube Microphone

The G7 is a tube condenser microphone based on the Neumann U67 and U47.  The designer describes the circuit as a combination of the M49 and U47, but with the tube from the U67.  Instructions, a bill of materials, and a PCB layout are available on the Gyraf website.

Images courtesy of Gyraf Audio

Notable Features:

  • Switchable between omni, cardiod, and figure-eight pickup patterns
  • Designed for AKG C12 capsule, with other options available
  • EF86 tube
  • Lundahl transformer

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