Balanced Output Building Block (Discontinued)

We no longer sell kits for this project, but you can order PCBs directly from OSHPark.

The Balanced Output Building Block kit makes it easy and affordable to add a high-quality balanced output to your existing gear and new designs.


  • Tiny form factor
  • RFI filter network on output
  • High-quality, bipolar, DC-blocking capacitors
  • Supports numerous line receiver/driver ICs:
    • Balanced Input ICs:
      • THAT Corp. 12xx series
      • Texas Instruments INA13x series
      • Analog Devices SSM2141
    • Balanced Output ICs:
      • THAT Corp. 1646
      • Texas Instruments DRV134
      • Analog Devices SSM2142
  • Large ground pad for convenient testing

Kit includes:

  • Printed Circuit Board
  • All PCB components
  • IC Socket
  • THAT Corp. 1646 IC
Mechanical (with THAT 1646 IC):
  • Size: 1.4″ x 1″ (25 x 36mm)
  • Mounting Holes: 3x #4 (Ø.125", 3.2mm)
  • I/O Pad Spacing: .100" (2.54mm)
  • Input Impedance: 5kΩ
  • Output Impedance: 50Ω
  • Gain: 6dB
  • Power Supply: ±4 to ±18VDC

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