I agree with the comments and recommendations. Still if the coax is out of the sun, exceptions to the rules can work. I have a 10' piece of Radio Shack RG-8X from the shack to the base of the antenna where I have a shorting knife switch. I take that coax 1' from the knife switch, and wound 6 turns through a 2" OD ferrite toroid to make a common mode choke. After about 3 years it is still working, and I've at times ran legal limit power with non-perfect SWR. Oh, antenna got a direct hit by lightning too, and vaporized part of my feedline to the knife switch. That tight radius turning around the 'roid' has yet to fail.
my 2 ¢,
Jim
WD5JKO