[Hallicrafters] Advice sought on antenna cable type

[Waldo Magnuson]

Hi,
    I am about ready to put up a 40m dipole antenna between tall trees 
near my home.  The antenna will be up about 65 ft. (tall trees) and I 
am concerned with the coax weight from the antenna center to my house.  
RG-8 seems heavy, RG-8x has been suggested and Radio Shack has RG-8m.  
The leadin will be about 75 feet and I will be using my HT-37 (100 
watts) on the antenna.  I would appreciate experienced thoughts on the 
subject.  Thanks.
Skip Magnuson