Yeah good call, RG11 will work great. I just had to make a jumper up with 75 Ohm Coax, and didn't want to crimp the F Connectors on RG6 Coax (RG6 Coax uses aluminum foil and aluminum shield wire, not able to solder) then half to use a F Female to PL-259 Male Adapter, kind of cheesy for a hundred watts or so.
I found some old RG59 that is all copper center and shield wire, had to drill open the back PL-259 adapters tho. Works ok, but again RG11 would be better.
Jay in the Great Mojave Desert