New Cb or used CB?
Open the Cb and look for anything shorting out. Wires frayed or touching the chassis, or something on the main board touching something it shouldn't.
Buzzing sound, was anything running in the Jeep? Heater fan, Cooling fan? Were you close to overhead power lines? florescent lights?
Cheap Cb's have cheap shielding. Need very good grounds throughout the vehicle. Try running your ground to the frame rather than the body.
You may have just had a couple of bad fuses. It's rare but it does happen.
"But it does me no injury for my neighbour to say there are twenty gods, or no god. It neither picks my pocket nor breaks my leg." - Thomas Jefferson, Notes on the State of Virginia, 1782
Arguing with a truck driver is like wrestling with a pig in mud, eventually you realize the pig enjoys it.