Peterbilt 579 antennas.

Dont work well in factory position anyways..To close together....SUPPOSED TO BE 108" apart...
Run 1 ant with yer own coax would be better

 

walcott sell a mount for the rear grab bar behind the cab

 

Could run cophased if he can get them grounded(braded ground straps req to bond to cab for SOME ground plain simulation)to the back of cab wall..

 

The factory antennas can be tuned better than they’ll arrive from factory.

If they’re RAMI (as on Volvo: wire wound clear in appearance) they aren’t known for longevity.

I’ve replaced those in the oilfield with similar length Firestick. An upgrade.

I didn’t use the Wilson 2000’s I had because I don’t believe those mounts to be very strong. I see this done on some I’ve observed, but if the mount fails, it won’t be easy to access.

 

I use the Hustler FG27S center load steel antenna on this 378 Pete I drive. I hit trees from time to time while driving through town. After 5 years it still looks good. Got mine from cb world.

 

I see some of our competitors are using 579 Pete’s. I haven’t had a chance to ask drivers yet about the Wilson 2000s I’m seeing. Extra short lower shaft and extra long stinger.

The Hustlers mentioned above are classics. I had one on a car forty years ago. Clays Radio carries them (and Wilson’s; and Firestik). Ask for their recommendation.

As before, I’d want to be able to replace that mount. So, can you get to it from interior? I’d find out first.

Craig notes the “ideal” distance. They’ll work even if a lesser distance, but not to best effect. For many of us with company trucks just have to work with what you have.

But it’s more than possible that a single antenna with high end coax could work better. Be willing to experiment. Spend for results. Antenna more important than “a big radio” and a lot cheaper.

 

Not sure how a dummy any will affect working antenna but i vaguely remember something in a negitive way..a firestick or skip shooter with tuneable tip will work better than a wilson...Your coil is up higher and very easy to tune..
Just subtract the mirror arm mount height from 13'6" and that will give you max length of ant you should buy...
Dont get into those bih ext coiled any just yet..I dont trust those mounts..