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Coaxial cable carries a signal using an inner conductor and a concentric outer conductor. The dielectric and construction determine characteristic impedance, losses and propagation speed.

An ohmmeter at an open cable end therefore does not simply measure the printed 50 Ω.

It screws directly onto the radio’s matching SMA connection and needs no separate antenna base or coaxial cable.

It screws directly onto the radio’s matching SMA connection and needs no separate antenna base or coaxial cable.

It screws directly onto the radio’s matching SMA connection and needs no separate antenna base or coaxial cable.

For coaxial cable use its documented velocity factor instead; these factors have different physical origins.

An L/C matching box couples the high-impedance radiator to the coaxial feed.

A dipole is a balanced radiator, while coaxial cable is an unbalanced line.

Software-controlled bias-T power can supply compatible active antennas or preamplifiers through the coaxial cable.

The 3/8″ version of the Sirio MAG 145 is a magnetic mount with an attached coaxial cable.

The PL version of the Sirio MAG 145 is a magnetic mount with an attached coaxial cable.