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The M17/128-RG400, commonly known as RG400 coaxial cable, is a high-temperature, flexible cable widely used in military and commercial applications. Below are its key specifications:

Electrical Specifications:

  • Impedance: 50 ± 2 ohms
  • Capacitance: 29.4 pF/ft
  • Maximum Voltage: 1,900 volts RMS
  • Velocity of Propagation: 69.5%
  • Maximum Frequency: 12.4 GHz

Attenuation (Loss) per 100 Feet:

Frequency (MHz)Typical Attenuation (dB)Maximum Attenuation (dB)
1004.14.5
4008.610.5
1,00014.218.1
2,40023.630.2
5,00037.052.1
10,00057.878.0

Note: Attenuation values represent signal loss over a 100-foot length of cable.

Power Handling Capability:

Frequency (MHz)Power (Watts)
101,869
301,072
50827
100580
400282
1,000173
1,500138
2,000118
2,500104
3,00093

Note: Power handling values are based on sea level conditions, ambient temperature of +40°C, and a Voltage Standing Wave Ratio (VSWR) of 1:1.

Mechanical Properties:

  • Inner Conductor: Silver-coated copper, 19 strands of 0.008" diameter
  • Dielectric: Solid Polytetrafluoroethylene (PTFE)
  • Shields: Double silver-coated copper braids
  • Jacket: Fluorinated Ethylene Propylene (FEP) Type IX per MIL-C-17
  • Overall Diameter: 0.195 inches (4.95 mm)
  • Weight: Approximately 50 lbs per 1,000 feet
  • Minimum Bend Radius: 1.0 inch
  • Operating Temperature Range: -55°C to +200°C

These specifications make RG400 coaxial cable suitable for high-frequency applications requiring durability and consistent performance across a wide temperature range.

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High Temp M17-RG400 Coax "Sold By The Foot"
Our price: $3.61
Sale Price: $3.56
Savings: $0.05

(1)
High Temp M17-RG400 Coax 25 FT
Our price: $90.17
Sale Price: $88.17
Savings: $2.00
High Temp M17-RG400 Coax 50 FT
Our price: $180.34
Sale Price: $177.34
Savings: $3.00
M17/128-RG400 Made up of  9/.0080 silver-coated copper conductor with a polytetrafluoroethylene (PTFE) dielectric, fluorinated ethylene propylene (FEP) jacket, and 2 overall shields of 36 AWG silver-coated copper braid shields. M17/128-RG400 Made up of  9/.0080 silver-coated copper conductor with a polytetrafluoroethylene (PTFE) dielectric, fluorinated ethylene propylene (FEP) jacket, and 2 overall shields of 36 AWG silver-coated copper braid shields. M17/128-RG400 Made up of  9/.0080 silver-coated copper conductor with a polytetrafluoroethylene (PTFE) dielectric, fluorinated ethylene propylene (FEP) jacket, and 2 overall shields of 36 AWG silver-coated copper braid shields.
High Temp M17-RG400 High Temp M17-RG400 High Temp M17-RG400
High Temp M17-RG400 Coax 75 FT
Our price: $270.51
Sale Price: $266.51
Savings: $4.00
High Temp M17-RG400 Coax 100 FT
Our price: $360.68
Sale Price: $355.68
Savings: $5.00
High Temp M17-RG400 Coax 125 FT
Our price: $450.85
Sale Price: $444.85
Savings: $6.00
M17/128-RG400 Made up of  9/.0080 silver-coated copper conductor with a polytetrafluoroethylene (PTFE) dielectric, fluorinated ethylene propylene (FEP) jacket, and 2 overall shields of 36 AWG silver-coated copper braid shields. M17/128-RG400 Made up of  9/.0080 silver-coated copper conductor with a polytetrafluoroethylene (PTFE) dielectric, fluorinated ethylene propylene (FEP) jacket, and 2 overall shields of 36 AWG silver-coated copper braid shields. M17/128-RG400 Made up of  9/.0080 silver-coated copper conductor with a polytetrafluoroethylene (PTFE) dielectric, fluorinated ethylene propylene (FEP) jacket, and 2 overall shields of 36 AWG silver-coated copper braid shields.
High Temp M17-RG400 High Temp M17-RG400 High Temp M17-RG400
High Temp M17-RG400 Coax 150 FT
Our price: $541.02
Sale Price: $533.02
Savings: $8.00
High Temp M17-RG400 Coax 175 FT
Our price: $631.19
Sale Price: $623.19
Savings: $8.00
High Temp M17-RG400 Coax 200 FT
Our price: $721.36
Sale Price: $711.36
Savings: $10.00
M17/128-RG400 Made up of  9/.0080 silver-coated copper conductor with a polytetrafluoroethylene (PTFE) dielectric, fluorinated ethylene propylene (FEP) jacket, and 2 overall shields of 36 AWG silver-coated copper braid shields. M17/128-RG400 Made up of  9/.0080 silver-coated copper conductor with a polytetrafluoroethylene (PTFE) dielectric, fluorinated ethylene propylene (FEP) jacket, and 2 overall shields of 36 AWG silver-coated copper braid shields. M17/128-RG400 Made up of  9/.0080 silver-coated copper conductor with a polytetrafluoroethylene (PTFE) dielectric, fluorinated ethylene propylene (FEP) jacket, and 2 overall shields of 36 AWG silver-coated copper braid shields.