CB Buzzing/Humming When Keying Up

I'd start with replacing the stud then check swr or vice versa

 

I'd say it is time to replace that particular antenna.the solder that connects the stud to the antenna internally is more than likely broken. I have had two francis,the 5.5' ones,break at the point you reference.one snapped and just swung down going down the road and the other hit a limb,or i hit the limb-whatever,and it separated like that,sliding up and down in the mounting end. Lots more ground noise became prevelant and was eliminated w/a new antenna,another francis.

 

rollingradios knows his stuff and should be listened to when he offers advice, but I'm going with x#1 on this one........especially if a Francis is involved! (I run Francis' too)

 

Francis antennas are just not what they used to be but I still will swear by them! and the bang for the buck just can't be topped-

 

I agree...and easy to find when you need to replace one.