CB antenna resistance question

pabloconrad · Jan 1, 2007

Does anyone know what the resistance the antenna should have from tip to shield? I've read 50 ohms but am not quite sure.

Also, what happens to your CB if you try to Xmit with a shorted antenna?

Thanks in advance.

cocoloco · Jan 1, 2007

the final output transitor will burn out then it will not transmitt it there is a short or a bad SWR

Daron Y. · Jan 1, 2007

You were right, 50ohms on the coax. Your cb is also 50ohms. When you match your antenna in,if your antenna is adjustable you are trying to get it as close to 50ohms as you can. If you run your cb with a high SWR it most likely will take awhile to burn out your final. Most cb's detect high SWR's and cut it's output. hope i helped

old_man · Jan 1, 2007

Daron, don't answer if you don't know what you are talking about.

The resistance is NOT 50 ohms. The impedence is 50 ohms. Big difference. For the most part, if you measure a cb antenna with an ohmmeter, it should read as an open or infinate resistance. There are exceptions to this rule, but they are not your standard run of the mill antennas and are one in a thousand.

pabloconrad · Jan 1, 2007

old_man said:
Daron, don't answer if you don't know what you are talking about.

The resistance is NOT 50 ohms. The impedence is 50 ohms. Big difference. For the most part, if you measure a cb antenna with an ohmmeter, it should read as an open or infinate resistance. There are exceptions to this rule, but they are not your standard run of the mill antennas and are one in a thousand.

Thanks old_man. When I first installed it ( a Wilson K1000) it read infinity. Now its not (zero, zilch, nada, 1/. Guess I have to check for a crushed wire or shorted coil. It may just be snowmelt that refroze in the mount.

CB antenna resistance question

pabloconrad

NAXJA Forum User

cocoloco

NAXJA Forum User

Daron Y.

NAXJA Forum User

old_man

NAXJA Forum User

pabloconrad

NAXJA Forum User

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