3', 6' or 9' Cables?

[222FL]

If it's a base setup and you have no major obstructions you should be able to get out that far conditions permitting. That said, get your antenna as high as possible if it's for local use. Not sure what your antenna setup is, but make sure it's at its best before you add an amp!! But the coax deal is BS and of you bed to use a specific length of coax for an antenna it either will specify so or there are other issues such as vswr, impedance mismatch, vswr, both at the antenna and at the radio. Lots to go through. Get your antenna system best it can be! Good coax, connectors, and a proper install of grounding and antenna system, will all help.