Cable Coax Loss Table

Coax Cable
Coax Cable

Attenuation (dB per 100 feet), Coax Cable Signal Loss (attenuation) in dB per 100ft*

Impedence50Ω50Ω50Ω50Ω75Ω75Ω50Ω50Ω
LossRG-174RG-58RG-8XRG-213RG-6RG-11RF-9914RF-9913
1MHz1.9dB0.4dB0.5dB0.2dB0.2dB0.2dB0.3dB0.2dB
10MHz3.3dB1.4dB1.0dB0.6dB0.6dB0.4dB0.5dB0.4dB
50MHz6.6dB3.3dB2.5dB1.6dB1.4dB1.0dB1.1dB0.9dB
100MHz8.9dB4.9dB3.6dB2.2dB2.0dB1.6dB1.5dB1.4dB
200MHz11.9dB7.3dB5.4dB3.3dB2.8dB2.3dB2.0dB1.8dB
400MHz17.3dB11.2dB7.9dB4.8dB4.3dB3.5dB2.9dB2.6dB
700MHz26.0dB16.9dB11.0dB6.6dB 5.6dB4.7dB3.8dB3.6dB
900MHz27.9dB20.1dB12.6dB7.7dB6.0dB5.4dB4.9dB4.2dB
1GHz32.0dB21.5dB13.5dB8.3dB6.1dB5.6dB5.3dB4.5dB

*note Coax losses shown above are for 100 feet lengths. Loss is a length multiplier, so a 200ft length would have twice the loss shown above and a 50 ft length would have half the loss, and so on, and so forth. This multiplier factor is why you should keep the cable installation lengths between the radio and antenna as short as practical.

Marcus Hazel-McGown - MM0ZIF
Not Disclosed at Havenswell. | inferno@mm0zif.radio | Website | + posts

Hi I am Marcus, MM0ZIF, a licenced Radio Amateur, Doctor of Musicology, amateur weather enthusiast. I over the years have been a Amateur Radio Tutor, Examiner, and a Regional Manager for the Radio Society of Great Britain.

This site is dedicated more towards Amateur Radio and Weather, with an angle on Technology too. I also maintain https://havenswell.com/ which is my other blog which is more aimed at cooking, hobbies and life in general as well as businness and networking.

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