How to Increase Power Output on Cobra CB Radios

Save

The Federal Communication Commission (FCC) limits the maximum power a CB radio can transmit at 4 watts. You legally can't boost the radio's power. However, power from the Cobra radio isn't the only factor involved in transmitting distance. The antenna can be tuned to allow the maximum power to be transmitted. In effect, increasing the power output of the Cobra.

Things You'll Need

  • Cobra CB radio with a built-in SWR meter
  • Mobile adjustable antenna with adjustable screws
  • Extend the antenna and tighten the set screw lightly. The antenna should be able to be tapped with your finger to adjust the length.

  • Set the Cobra CB to channel 21.

  • Press the push-to-talk (PTT) switch and tap the antenna, making it shorter. The SWR meter will show a lower reading each time the antenna is tapped.

  • Keep tapping until the SWR meter reaches its lowest point and starts to rise again. The lowest point is where the antenna is optimized for channel 21.

  • Switch between channels 1 and 40 and compare readings. They should be very similar. The antenna is now optimized to provide the maximum power output.

Tips & Warnings

  • Some tunable antennas can be cut, rather than adjusted. Cut the antenna length in eighth-of-an-inch increments. Obviously, don't cut too much as you won't be able to lengthen it if you have to.
  • Keep all doors closed when adjusting the antenna. Check you don't pinch your coaxial cable

References

Promoted By Zergnet

Comments

You May Also Like

  • How to Extend Range on CB

    Citizen's Band (CB) radio communications is a popular pastime, enhanced by the participants' ability to hear distant transmissions and reply to them....

  • How to Peak & Tune a Cobra 29 Ltd CB Radio

    Tuning your Cobra CB, or any other CB, will increase the accuracy with which it delivers and receives signals. A correctly tuned...

  • Instructions for a Cobra CB Radio

    Cobra has been manufacturing CB (Citizen Band) radios for more than 40 years and has introduced many different models. Most of these...

  • How to Modify a Cobra CB Radio

    It is illegal to modify the Cobra CB (Citizen Band) radio's circuitry to boost the radio's output. However, you can modify the...

  • How to Boost CB Power

    Citizens band radios normally operate at around 5 watts of broadcast strength. However, those that need to use a CB radio for...

Related Searches

Check It Out

Geek Vs Geek: Robot battles, hoverboard drag race, and more

M
Is DIY in your DNA? Become part of our maker community.
Submit Your Work!