FCC Technician Exam Question Of The Day (T7C11)

Q) What is a disadvantage of "air core" coaxial cable when compared to foam or solid dielectric types?

A) It requires special techniques to prevent water absorption


NJ2X Notes:
A coaxial design in which a monofilament of plastic holds the center conductor in place in a hollow plastic tube allowing the remainder of the dielectric to be air. Typical velocities of up to 84% can be achieved in this design.

RG-59 air core coaxial cable


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