cb help

The only thing known so far is it appears you have a "Co-phased" dual antenna setup. If you plan on using both, you will need a PL259 to Dual Male MUHF Adapter for starters. This coax is attached to your radio and splits them into 2 connectors allowing them to connect to the smaller ones you have in your truck. Most truck stops have them as well as any reputable CB Shop. That's not all. Antenna type? Length? Grounding? SWR Work?

It would help to know:

1. Make / Model / Year of Truck

2. CB Make Model

3. Level Of Radio Experience / Electrical / Mechanical Aptitude

 

You can use both 3' antennas, but I'd recommend a 4' length for both, same make, whether it's a Wilson, Firestik or something else. I'd recommend the Wilson.

If your stuck with the factory coax, go ahead and get the adapter I mentioned.

Connect your coax and install your radio. I would not power up your radio until the coax has been connected. And definitely, do not key the mic unless the coax has been connected.

If you're not experienced in setting the SWR, I would recommend you find a reputable CB shop and have them not only check your SWR, but they can also identify any fault issues you may have such as improper grounding, bad length of coax etc.

There are many opinions about 2 antennas vs 1. Some swear by it, others just prefer a single. There are trade offs and advantages to both, just depends.

The main principles you absolutely need regardless is a good radio, decent mic, proper grounding, good coax and type, decent antenna(s) and proper SWR tuning of the antennas.

If you're not comfortable with doing the SWR tuning, again, I'd recommend a professional do it.