Just a comment on Times Microwave LMR cables: In outdoor application its "VERY" important to seal connectors properly.
The aluminum tape shield oxidizes in presence of moisture with resulting change in impedance and attenuation. I just replaced a 45-foot run of LMR-600 which hangs off my eme tower supported by a pilot cable. Because it is run vertically water entered the upper connector and pooled at the bottom connector such that when I pulled off the N connector water poured out in a stream for a couple minutes. I finally had to replace the run as SWR would rise every time temperature went above 32F. After removal I cut away sections of the bottom end of the cable to reveal that about 18-inches had badly corroded. New LMR-600 run has my 2m SWR lower (0.14) than it has been for about three years (so this condition had been increasing over time).
I run LMR-400, LMR-400UF, LMR-240 and LMR600 outside (along with LDF7-50A and LDF5-50A Heliax). Heliax appears to totally isolate moisture to outside the copper shielding if connectors are well constructed and sealed. I use the LMR-240 for receive lines after my preamps to run down to ground level where I connect LMR-400 to continue to the "shack".
LMR works just fine if you keep moisture from entering the coax. Only runs of RG-213 are to my 600m inverted-L, 80/40m inverted-V and to my tribander yagi.
73, Ed - KL7UW http://www.kl7uw.com "Kits made by KL7UW" Dubus Mag business: [email protected] ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[email protected] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to [email protected]
