I'm looking for advice for running coax cable to my shack on the second floor of my house. I'm planning to use this coax line for HF (recently upgraded to General!). I'm a newbie and I am very handy, but have never done something like this. I haven't bought an HF radio yet because I want to make sure I have a solid plan for the antenna first.
Here is a rough diagram that I drew of my house + listed two options that I have come up with:
Two options for connecting an outside antenna to my shack:
Repurpose comcast TV coax that is already in the walls (probably 75ohm). There is already a run from the utility room in my basement to my shack. I know this route is problematic because of the impedance of the coax designed for TV.
Run a new proper 50ohm coax line to the shack using the easiest route that I can find (~130 feet of cable inside the house). I'm confident I can do this successfully. My only concern is the length of cable required (~130 feet inside + ~150 feet outside to the antenna = 280 total feet).
It would be possible to create a shorter path by drilling a hole from the attic + running a cable across the roof and down the side of the house. I'd really like to avoid having to do anything on the roof though. This also is maybe a little more complicated for grounding the cable. I'd really like to avoid this option entirely if the route I have already worked out seems reasonable.
The left side of the house is my best option for putting an antenna, so I'd like to avoid any cable runs that originate from the right side.
I'm open to other ideas if people have any. Please let me know if either of the options I listed seem worthwhile.
Update 12/30/2021: I ended up deciding on a different location for my shack that will result in a much shorter cable run. Thanks for the feedback!