Need more ribbon cable?

You can order it from most electronics supply stores. Here are some sample specs for 34-wire and 40-wire ribbon cable.)

BEL-9L28040 Ribbon Cable

• Physical Description:
•  Number of conductors: 40
•  Width: refers to the width including insulation.
• Inches: 2.0" +/- .012".
•  mm: 50.8 +/- .3
• Span: refers to the width from centerpoint of conductor #1 to centerpoint of conductor #40, not including the insulation on the edges.
•  Inches: 1.950" +/- .012".
•  mm: 49.53 +/- .3.
• Conductor: 28 AWG (7 x 36) tinned copper.
•  Insulation: .010" Nom. wall gray PVC.
•  Pitch: 0.050" +/- 0.002". Pitch refers to the distance between conductors.
•  Color: Gray with red polarity stripe (standard).
•  Application: Internal interconnection or internal wiring of electronic equipment.
• Electrical:
•  Voltage Rating: 300v RMS.
•  Current Rating: 1 AMP.
•  Conductor Resistance: 68 ohms/1000 ft.
•  Capacitance @ 1 MHz: 15pF/ft. (49pF/m).
  
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BEL-9L28034 Ribbon Cable

• Physical Description:
  Number of conductors: 34
  Width: refers to the width including insulation.

  Inches: 1.7" +/- .008".

  mm: 43.18 +/- .2
  Span: refers to the width from centerpoint of conductor #1 to centerpoint of conductor #34, not including the insulation on the edges.

  Inches: 1.650" +/- .008".

  mm: 41.91 +/- .2.
  Conductor: 28 AWG (7 x 36) tinned copper.
  Insulation: .010" Nom. wall gray PVC.
  Pitch: 0.050" +/- 0.002". Pitch refers to the distance between conductors.
  Color: Gray with red polarity stripe (standard).
  Application: Internal interconnection or internal wiring of electronic equipment.
• Electrical:
  Voltage Rating: 300v RMS.
  Current Rating: 1 AMP.
  Conductor Resistance: 68 ohms/1000 ft.
  Capacitance @ 1 MHz: 15pF/ft. (49pF/m).
  
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