Miltech Cable Assemblies
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MILTECH Cable Assembly Families
MILTECH Cable Assemblies are available in a range of types -
This is our high performance workhorse series of rugged, low insertion loss, broadband (0.5-18GHz), vapor sealed, braided Aramid fiber outer jacket, cable assemblies. Qualified for use in countless applications, meeting demanding military standard and application-specific requireents, including MIL-T-81490 and MIL-C-87104/2 requirements as defined below.
MILTECH LIGHTWEIGHT (MTL) SERIES
Lighter-weight versions of the standard MILTECH Assemblies. They also feature physically smaller - but still rugged and fully qualified - connectors.
MILTECH SPECIAL JACKET SERIES: MTXR, MTLS, MT-PUR, MT130
Special Jackets for MILTECH assemblies include LS low smoke compounds, PUR ultra-flexible polyurethane, thin wall FEP and XR styles. More than just a special jacket, the XR cables are "eXtra Ruggedized"against physical damage - this is a Sealed MilTech cable that incorporates an integrated crush-resisting spring inside the cable.
MilTech™ Technical Specifications
MILTECH™ CONSTRUCTION DETAILS (TYPICAL)
MILTECH™ CABLE CHARACTERISTICS
CABLE MATERIALS
|
Center Conductor |
Silver Plated Copper |
Component A |
|
Dielectric |
Taped Polytetrafluoroethylene (PTFE) |
Component B |
|
First Shield |
Silver Plated Copper Strip |
Component C |
|
Interlayer |
Aluminum Backed Tape |
Component D |
|
Second Shield |
Silver Plated Copper Braid |
Component E |
|
Inner Jacket |
FEP |
Component F |
|
Outer Jacket |
Braided Nomex™ |
Component G |
MILTECH CONNECTOR CHARACTERISTICS
All of the MilTech connectors meet or exceed interface requirements of MIL-C-39012 and are uniquely designed to provide maximum mechanical and environmental performance. Threaded connectors are of a precision stainless steel design, and contacts are precision heat-treated Beryllium Copper.
CONNECTOR MATERIALS
|
Center Contacts |
Gold plated Beryllium Copper (BeCu) |
|
Dielectrics |
Polytetrafluoroethylene (PTFE) |
|
Bodies and Coupling Nuts |
Passivated Stainless Steel (Titanium for certain light weight connectors) |
CABLE ASSEMBLY CHARACTERISTICS
ELECTRICAL CHARACTERISTICS
|
Tested Frequency Range |
0.5 to 18 GHz (typical, also depends on cable choice) |
|
Characteristic Impedance |
50 Ohms |
|
VSWR |
1.40:1 maximum ; add 0.05 per angle connector |
|
Insertion Loss |
See individual cable specifications, add 0.1 dB per angle connector |
|
Velocity of Propagation |
See individual cable specifications |
|
Maximum Operating Voltage |
2500 Volts (1000 volts with SMA) |
|
RF Leakage |
-90 dB maximum per foot over Tested Frequency Range including connectors |
MECHANICAL CHARACTERISTICS
|
Operating Temperature Range |
-55 to +150 degrees C (200 C maximum available on request) |
|
Chemical Resistance |
In accordance with MIL-T-81490 and MIL-C-87104 |
|
Flexure |
In accordance with MIL-C-87104 |
|
Salt Fog |
In accordance with MIL-T-81490, MIL-C-87104 and other specifications |
|
Humidity |
In accordance with MIL-T-81490, MIL-C-87104 and other specifications |
|
Abrasion Resistance |
In accordance with MIL-T-81490 and MIL-C-87104 / .020” edge |
|
Cable Connector Tensile Strength |
See individual cable specifications |
|
Vapor Leakage |
1x10-5 cc/sec/ft of Helium maximum including connectors |
|
Vibration |
In accordance with MIL-T-81490 and other specifications |
|
Shock |
In accordance with MIL-T-81490 and other specifications |
MilTech Replaceable Connectors
A major benefit of choosing MILTECH Assemblies is the availability of many interchangeable connector front ends. This allows simple field replacement of damaged interfaces using hand tools, often while the cable assembly is still installed. Available to support the Standard, Lightweight and XR Cable Assemblies.
Replaceable connector front ends used in MILTECH assemblies maintain the vapor seal characteristics of the completed assembly, assuring uncompromised performance, even after in-situ maintenance replacing damaged components.
Replaceable Connector Information
Times manufactures these and other replaceable front end families, and supports fielded cable assemblies with many replacement connector front ends. Your Times representative is ready to assist you with any spares needs you may have.
MilTech SELF-LOCKING Connectors
Many applications benefit from choosing Times self-locking connectors -
Threaded coupling connections can be problematic in high-vibration-environment applications. For many years, this has been addressed by using lockwire to secure coupling nuts. Lockwiring is a labor-intensive process requiring special tooling, and is associated with the potential creation of FOD (Foreign Object Debris).
Times self-locking connectors on your assemblies eliminate the need for lockwiring, significantly reduce installation and maintenance times, and prevent lockwire-related FOD.
For help with using Times self-locking connectors on your assemblies, contact your Times Regional Application Engineer for experienced support. Contact your Military/Aerospace Regional Representative.
For a listing of connectors suitable for use, including the self-locking connectors highlighted here, refer to the Replaceable Connector Information Section.
MilTech SUPPORT TOOLs
The MILTECH product line is supported with a series of easy-to-use hand tools and shop aids to allow straightforward connector maintenance in the field (if needed), and to assist with difficult installations.
Maintenance and Installation Tool drawings and instructions
Your Times Regional Application Engineer will be happy to support your organization with installation and straightforward maintenance training. Contact your Military/Aerospace Regional Representative .
SPECIALIZED MilTech PRODUCTs
HIGH-DENSITY INTERCONNECTS / MULTI-PORTS -- BLINDMATE CONNECTIONS -- LOW SMOKE REQUIREMENTS -- TMTA ADAPTERS -- EQUALIZED ASSEMBLIES -- LOSSLESS (Zero-dB) ASSEMBLIES -- AXIALLY-ROTATING COAXIAL CONNECTORS -- STEPPED PHASE-ADJUSTMENT CONNECTORS -- CONTINUOUSLY PHASE-ADJUSTABLE CONNECTORS
Information on some of the more SPECIALIZED MILTECH PRODUCTS is available here. Contact your Military/Aerospace Regional Representative to get started developing the special interconnection solution to your application.
MilTech Cable Assembly Ordering Information
A Complete Part Number is specified as follows:
MTxyyy/L/C1/C2
Where x = cable type (MT for Standard series, MTL for Lightweight series)
yyy = cable type (265 or 340XR)
L = Length (in Inches or millimetres, see below)
C1 = Connector 1 Designator
C2 = Connector 2 Designator
Example 1 - a 460 inch long Cable Assembly with a Replaceable SMA
male on one end and a Replaceable TNC male on the other end would have the
Part Number MT340/in460/48530/48555
Example 2 - a 430 millimetre long Cable Assembly with a Replaceable SMA
male on one end and a Replaceable TNC male on the other end would have the
Part Number MTL330/mm430/48530/48555
Marking
Cable Assemblies are marked in the center or on each end depending on Cable Assembly Length as follows:
Times Microwave Systems
MFG: xxxxx (TMS manufacturing CAGE Code, as applicable)
MILTECHxxx/xxx/xxxxx/xxxxxx
Length Tolerances
+0.5" / -0” (12.7mm) for Cable Assemblies less than 5 ft (1524mm)
+1" / -0” (25.4mm) for Cable Assemblies between 5 ft (1524mm) and 10 ft (2540mm)
+1% / -0% for Cable Assemblies Greater than 10 ft (2540mm)
+4% / -0% for Cable Assemblies with time delay or phase matching requirements
Testing
Each Cable Assembly is measured for Insertion Loss and VSWR over the Test Frequency Range.
