After getting some decent antennas, I've been looking to get off my RG-8X coax and into something better. I didn't know how lossy it was until I looked at some dB figures. The longer runs certainly don't help me either. And I'm looking at getting something decent for my VHF/UHF rigs, since I'm about deaf on 432 running RG-8X. So I can understand this theory, I'll say hypothetically, a certain type of coax has a 3dB loss at 100' at 30mhz per a chart. If it has 2 UHF type connectors on it, and its 100', what is its loss now? Do I just add in 2x the insertion loss of a UHF connector? I'm also looking at insertion losses. The rig, to the ATU, to the window pass through (both sides) to another coax, perhaps a barrel connector to another coax, to a balun; add in an amp, here's 2 more connections. So, running an amp on the long coax through the window setup, that's a bunch of connections and loss potential. I'm supposing the loss I'm experiencing as also on the RX end. So cutting out losses I think will help somewhat. Ideas? I'm working on the antenna end, but have recently discovered I had 3 bad coaxes after I made a couple of changes and it would not tune at all (on one, center to center had no continuity, center to shield had continuity on another one). I have to wonder how much loss the tuner itself puts into the equation. Only thing I can think of is to limit the amount of connections. On VHF I just raise the window and run directly to the antenna. Normally I don't run the amp so I disconnect those 2 from the equation. But I'm not hearing as well as I think I could, and perhaps the losses are some part of that.