TRX Triaxial Cable

MIL-DTL-17 Triaxial Cable Construction

Periodically, isolation of shields in a coaxial cable is an important consideration. Harbour has constructed a number of TRX (Triaxial) cables, expanding the product line offered in the MIL-DTL-17 specification. (Currently, the MIL-DTL-17 specification defines only one triaxial — M17/131-RG403, a triaxial version of M17/93-RG178.) With an existing double braided construction, an interlayer of insulation is used between the two braids. With a single braided cable, an interlayer and a second braid is used. Complete isolation between the braids is realized, in addition to achieving a more effective shield configuration.

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TRX (Triaxial) Cable

Part Number	Center Conductor  Diameter	Dielectric Diameter	Diameter Over  Inner Braid	Diameter Over  Interlayer	Diameter Over Outer Braid	Overall Diameter	Impedance (ohms)
M17/131-RG403	.0120 ̋ (7/.0040 ̋)	.033 ̋	.049 ̋	.074 ̋	.090 ̋	.116 ̋	50
TRX316	.0201 ̋ (7/.0067 ̋)	.060 ̋	.076 ̋	.096 ̋	.112 ̋	.140 ̋	50
TRX142	.037 ̋ Solid	.116 ̋	.136 ̋	.166 ̋	.186 ̋	.215 ̋	50
TRX400	.0384 ̋ (19/.008 ̋)	.116 ̋	.136 ̋	.166 ̋	.186 ̋	.215 ̋	50
TRX179	.0120 ̋ (7/.0040 ̋)	.063 ̋	.079 ̋	.099 ̋	.115 ̋	.141 ̋	75
TRX180	.0120 ̋ (7/.0040 ̋)	.102 ̋	.118 ̋	.138 ̋	.154 ̋	.180 ̋	95

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