How to Use Solder BNC Connectors

Written by richard asmus
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How to Use Solder BNC Connectors
Use BNC connectors for low-power RF signals. (BNC connectors and cable image by Albert Lozano from

BNC connectors attach radio frequency (RF) cables for easy-to-make connections and disconnections. Usually the internal connections are crimped, but some older cables have soldered connections. But how the connections are made has no effect on the use. Use BNC connections for low-power RF signals for a wide variety of applications, including security cameras. You can join signals with "T" connections and extend or splice BNC cables with a "barrel" connection. But whatever the application, the method of use remains the same.

Skill level:
Moderately Easy

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  1. 1

    Push the BNC male connector onto the female connection point. The collar on the male connector has two grooves, and the female has two nubs with which the grooves must align. Turn the male connector collar to align the grooves with the nubs and then push it on. You can do it by feel. Just start to push the connector on and then turn the collar until it easily slips into place.

    How to Use Solder BNC Connectors
    Use a BNC "T" to join signals. (BNC connectors and cable image by Albert Lozano from
  2. 2

    Turn the collar one quarter of a turn clockwise to lock it in place.

  3. 3

    Disconnect the BNC connector. Turn the collar one quarter of a turn counterclockwise to unlock it and then pull the connector off of the connecting point.

Tips and warnings

  • BNC connectors fit on a variety of radial ground (RG) coaxial cables that each has a centre conductor and an outer shield made of braided copper. The shield is usually connected to ground to prevent noise from entering the signal going along the centre conductor. Likewise, the shield prevents the radio signal inside the cable from leaking out and interfering with other signals.

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