For BNC and larger connectors: This
attachment method is similar to the V-Groove type used for flexible
cable, but is adapted to use with semi-rigid cable by replacing
the braid-clamp ferrule with a ferrule designed to be soldered to
the jacket (outer conductor) of semi-rigid cable. This design allows
right-angle or chassis-mounted connectors to be re-oriented after
cable attachment to easily conform to system layout.
The cable is stripped, and the ferrule is soldered to the cable
jacket before soldering the contact to the cable conductor. This
allows for trimming the cable dielectric after soldering the jacket,
eliminating any dielectric extrusion that may occur during jacket
soldering. Captive contacts (as shown) are highly recommended for
connectors used with semi-rigid cable.
SMA and other small-size connectors
feature simplified solder-clamp assembly for semi-rigid cable which
incorporates a reduced parts count and captive contact. This design
allows right-angle or chassis-mounted connectors to be re-oriented
after cable attachment to easily conform to system layout.
The cable is stripped and inserted into the backnut / insulator
/ contact assembly, and the connector contact soldered to the cable
conductor. The cable jacket (outer conductor) is then soldered to
the backnut. The prepared cable is inserted into the body assembly
and the backnut tightened. The captive contact provides consistent
axial contact location within the interface, and prevents movement
of the contact from cable flexure or temperature changes after assembly.
Some SMA connectors with solder-clamp cable attachment are qualified
to MIL-PRF-39012, Category B (non-field replaceable) and Category
E (MIL-defined cable stripping dimensions).