100ft. Times Microwave SF-142B Strip-Flex RG142 Silver Teflon N-male RF Coax Ham

Description

100 ft. of Times Microwave Systems SF-142B Low-Loss Microwave Interconnect Cable with N male connectors.
This is the Strip-Flex variant of standard M17 RG-142 Coaxial Cable.
See conditions statement and photos.
SF-142 Cable Construction Specifications
Inner Conductor:
Silver Plated Copper Coverd Steel
Inner Conductor Diameter:
0.037" (0.939mm)
Dielectric:
Solid Polytetrafluoroethylene (PTFE)
Dielecrtric Diameter:
0.116" (2.946mm)
First Shield:
Flat Silver Plated Copper Braid
First Shield Diameter:
0.127" (3.225mm)
Second Overall Braid:
Composite Aluminum Foil Strip
Second Overall Braid Diameter:
0.134" (3.403mm)
Third Overall Braid:
Silver Plated Copper Braided Wire
Third Overall Braid Diameter:
0.154" (3.911mm)
Jacket:
Fluorinated Ethylene Propylene
Outer Cable Diameter:
0.195" (4.953mm)
Environmental and Electrical Specifications
Operating Temperature Range:
F-131 / +392 (C-55 / +200)
Velocity of Propagation:
90%
Time Delay:
1.3 nS/ft
Impedance:
50ohms
Capacitance:
29.4pF/ft (96.46pF/m)
Shielding Effectiveness:
>90dBDCResistance
Voltage Withstand:
1900VoltsDC
Bend Radius:
1" (25.4mm)
Cuttoff Frequency:
18Ghz
The StripFlex shielding system, pioneered by Times Microwave Systems in the mid-sixties, consists of an inner silver plated flat ribbon braid (FSC), a spirally applied and overlapped composite aluminum tape interlayer (Intl), and an overall silver plated round wire braid (SC). The StripFlex shield affords approximately 15% lower loss and >95 dB shielding compared with the typical M17/RG round wire braided shield (40 to 60 dB).
Standard M17/RG cables are shielded with high coverage single or double round wire braids. While these shields provide 40 dB and 60 dB shielding effectiveness respectively, they are not particularly stable (loss & vswr) nor is the shielding adequate for today’s sensitive wireless communications and microwave military/defense applications.
VSWR is lower since the flat ribbons can be applied over the dielectric much more uniformly than multiend round wire braids. The VSWR and attenuation variation due to aging and flexure is substantially lower at all frequencies, and especially above 12 GHz. StripFlex cables are also available from Times that have been sweep tested for broadband VSWR and attenuation performance.
Standard inexpensive connectors (crimp or clamp style) commonly used on the M17/RG counterparts can be used on StripFlex.
Please contact me with any questions before buying.