nekpop

I meant LMR400….don’t know where the “H”came from.

That’s true but what makes HMR 400 better when it comes to attenuation is double shielding. Routing the coax inside the metal flagpole accomplishes the same thing. I have a 40 ft run but 30 ft of that is inside the metal pole. Loss is minimal and I have a lot less weight hanging on the connector to my an antenna. I have been pleased with the performance.

I mounted my gmrs base antenna atop a 30 foot flagpole and have coax fed down inside pole. I cut an exit hole in the pole and installed a grommet to protect the coax. It works great.