I feel hurt- everything I know must be BS; like the idea of remote station but terrain wont let it happen. Help me with some simple physics- doesn't that copper core have like a 96% efficiency or power factor, and wouldn't more element surface make up for recieve loss? I'm not intending some A99, if I'm climbing this sucker (an sun up to sun down event) I'll put a beam up there - maybe a Laser 400 ???
All wire has some amount of resistance. Same goes for coaxial cable.
For coaxial cable, as frequency goes up, losses go up. Also, as length increases, so does the loss.
A small coaxial cable like RG-58 is going to have a ton of loss over 1000 feet. Larger coaxial cable will have less loss, but will cost a lot more. It won't be a simple "amazon" type order, you would be looking at professional grade stuff and likely some level of professional installation. You wouldn't want to spend all that money on high grade coax cable, and then just leave it laying on the dirt running up the hill. It won't last long like that. Also, unless you own all that land up to the peak, there's challenges there. Running cable across someone elses land, or public land, has some rules involved.
"Laser 400"? Are you referring to Times-Microwave LMR-400? If so, it's a higher grade cable than RG-58, but it is still not enough to get useable performance over 1000 feet. Also, it's going to run you near $1.00 per foot at least.
To make this work, you need one (or a combination) of the following:
--Larger coaxial cable. Hobby grade stuff isn't going to cut it over 1000 feet. You are looking at hard line, measured in the dollars per foot range. It's going to get expensive quickly.
—Adding amplifiers/preamplifiers. You would need to send more power from the radio up towards the antenna to make up for the feedline losses. You'd also need to greatly amplify the received signal at the antenna end to send it back down to your radio if you want to be able to hear anything. Challenge here is that you'd need reliable power up at the antenna site. There are legality issues. I know you are willing to waive those, but others are not...
— Do what they do in the radio industry, you put the radio at the antenna and haul the audio back down the hill over twisted pair telephone wire. This gets a bit difficult as most CB's are not designed for this and it would take some custom fabrication. You would lose the ability to change channels, adjust squelch or other settings on the radio. Best you'd get would be audio and PTT up to the radio and audio down from the radio. It won't be an off the shelf consumer solution, it'll be a custom thing that will take knowledge, test equipment and money.
Is there a specific reason you need this on CB frequencies? CB radio has limited legal solutions that would make this work. If you can change to a different radio service, you'd have much more options.