At 08:31 AM 12/17/08, you wrote: >I know several people have complaints against LMR400 in duplex radio -- >do members of the group feel the same way about LMR600?
It's how it's built internally - dissimilar metals. See the second and third article on the Antenna Systems page at www.repeater-builder. >Recommended Coax and Connectors for the iDEN Enhanced Base Transceiver >System Motorola Engineering wrote this three page discussion of >cable types, connector types, with regard to combining, >intermodulation, and other RF performace factors. They concluded that >LMR-nnn and LMR-nnnn series cable is specifically NOT recommended in >radio site RF environments, especially duplex environments. While iDEN >is a 900 MHz system the physics is the same at 28 MHz through 1296 >MHz. Worth reading. > HELIAX Coaxial Cable for Low Intermodulation Generation Andrew >Engineering wrote this one page writeup on why foil-braid cable causes >intermod. Yes, you'd expect that conclusion from the makers of Heliax, >but there's a lot more to it than that. Worth reading. Mike WA6ILQ
