A few weeks ago I obtained ~600ft of new RG-6 / U coax for virtually nothing in an auction lot. So being the frugal ham that I am, I decided to give it a try in my shack. I made up a 100ft length using Home Depot W connectors, and cheap SO 239 to W adapters. I had maybe $10 in the whole 100ft line. (I checked online, and both BNC and SO 239 connectors for RG6/u are about the same price as RG-59 connectors.... so the price appears to work out fine.) I half expected it to work like crap, but low and behold, it seems to work as well or better than my RG-59 and RG-8X cables. Just to be sure, I flip flopped between the three several times, and checked the received signal using my spectrum analyser. I'm not seeing any noticable loss of signal. On transmit the SWR goes from ~1 to 1.5 (w the tuner settings left the same), but that is to be expected since it's 75ohm cable. All of that convinces me that the R-6 /U is pretty good stuff, and certainly can be used in ham applications. I don't think I'd mix it with 50 ohm cables in an array, but other than that, I think I like it. So what am I missing? Why won't my cheap R-6/U work just fine across the board?