Hello all. I am running into a minor issue and I am just looking for outside opinions. I have 2 scanners in my house, one Bearcat BCT7 (non digital) in the garage, and a BCD996XT (digital) in the office. My previous lower quality tower (before Mother Nature decided it was time to replace it) had an older Radio Shack scanner antenna with an "F" type connector. To keep everything simple, due to the "F" connector on the antenna, I ran RG6 down the tower, into the attic, used a splitter, and ran a length of RG6 to each scanner, going across the attic and down the walls to a low voltage wall box near each scanner. I just used an "F" to BNC connector to hook to the scanners. That set up seemed to work marginally well. Now that I have replaced my tower, I am using a Diamond D130J discone antenna. This antenna has an SO239 connector. I have a 500' spool of Times Microwave LMR-400, so due to the SO239 connector, I plan to use the LMR400 to come down the tower to a polyphaser and then into the attic.... Here is where my issue begins. LMR-400 is a 50 ohm coax and RG6 is a 75 ohm coax. Anyone who has ran wires across cramped attics and down walls can attest to how much of a pain this task can be. I am asking for opinions on this..... If I connect the LMR-400 to the splitter using an adapter, and leave the RG6 from the splitter to the scanners, does anyone think the ohm mismatch will cause issues? I understand if this was a transmitting radio, there would be issues for sure, but due to this being a receive only scanner, are the same issues there? I'd really like to avoid unnecessary work in the attic by running all new LMR-400 to replace the RG6, but I just don't know what type of issues I will run in to if I don't.
For reference, the LMR-400 run to get down the tower (antenna mounted at the 45' mark), to the polyphaser, and then into the attic to the splitter would be around 75'. After the splitter, the RG6 to the garage non digital scanner is about 40' and the RG6 to the office digital scanner is about 20'.
I also have a healthy sized spool of RG6 which I could run from the antenna, but I figure the loss to be less by using the LMR-400.
Sorry this was long. Just wanted to get all of the details out so I could receive good opinions.
For reference, the LMR-400 run to get down the tower (antenna mounted at the 45' mark), to the polyphaser, and then into the attic to the splitter would be around 75'. After the splitter, the RG6 to the garage non digital scanner is about 40' and the RG6 to the office digital scanner is about 20'.
I also have a healthy sized spool of RG6 which I could run from the antenna, but I figure the loss to be less by using the LMR-400.
Sorry this was long. Just wanted to get all of the details out so I could receive good opinions.