Okay so I understand that coax length is important. Like 18 feet of RG-58 is 50 oms.
So what about getting that 18' of coax to the mast and up to the antenna if it is a total of 40' or so? Does RG8 go by the same rule? I'm lost on oms. How do I add length to get to the antenna?
I'm doing two applications. One is a C.B. base antenna that will be on an old flagpole for a mast. About 20' tall (above cement surface). It will be just off the pool fence, about 25' from the corner of the house. Then 10-15' inside the house. About 60' in all (could be more).
The other will be a VHF antenna on the top of the swamp cooler. It's MURS so I want to get the SWR as best I can having only 2 (5) watts to work with. I have the large MasterCool type. A nice ground plane area for a magnet mount I have. (I ran a Kraco center load Magnet Mount up there for 15 years lol). So the coax is 15 feet with a PL-259. If I make an extension lead to get it another 10-15' to the base unit and put a BNC on it, I can plug it onto the base. What about SWR on VHF? I've never done that before. How does oms affect VHF tuning?
You can tell I'm a coax twit, help me please
So what about getting that 18' of coax to the mast and up to the antenna if it is a total of 40' or so? Does RG8 go by the same rule? I'm lost on oms. How do I add length to get to the antenna?
I'm doing two applications. One is a C.B. base antenna that will be on an old flagpole for a mast. About 20' tall (above cement surface). It will be just off the pool fence, about 25' from the corner of the house. Then 10-15' inside the house. About 60' in all (could be more).
The other will be a VHF antenna on the top of the swamp cooler. It's MURS so I want to get the SWR as best I can having only 2 (5) watts to work with. I have the large MasterCool type. A nice ground plane area for a magnet mount I have. (I ran a Kraco center load Magnet Mount up there for 15 years lol). So the coax is 15 feet with a PL-259. If I make an extension lead to get it another 10-15' to the base unit and put a BNC on it, I can plug it onto the base. What about SWR on VHF? I've never done that before. How does oms affect VHF tuning?
You can tell I'm a coax twit, help me please