On 1/31/2011 3:02 PM, Dennis W0JX wrote: > I have found that the quality, and therefore the loss, of RG-6 cable varies > quite a bit. On the average, I measure about 14 ohms of resistance in 500 > feet if shorted at the far end. Recently, I put up a dual flag RX antenna and > felt that the sensitivity was far down from normal. It turned out that my > resistance was about 20 ohms for 500 feet. I discovered some oxidized > connections in a splice and also some water contaminated aluminum shielding. > If you are going to use long runs of RG-6, I recommend Quad with the larger > center conductor, very careful sealing of any splices to prevent moisture, > and if available, flooded cable to seal any pinholes.
Great advice. Also, stick to major mfrs like Belden and Commscope. > > I have found that the low-price Home Depot stuff has a PVC jacket which is > easily cut and exposes the braid to moisture. The aluminum shield then starts > oxidizing. See http://audiosystemsgroup.com/Coax-Stubs.pdf 73, Jim K9YC _______________________________________________ UR RST IS ... ... ..9 QSB QSB - hw? BK
