At 4/12/2008 14:03, you wrote: >Eric, >Again thanks for your splendid research. > >Looking through the old and new RG214 spec it looks like the Aluminium >foil was inserted to improve vertical flame performance. > >The foil is in the RF cold area behind the 2 shields, however Im sure >there are instances where this foil will corrode and introduce increasing >intermodulation with age.
When you think about it, in theory there should be no RF current flow on the braid shield portion of LMR-400 either. In practice, you get it at the antenna. For this reason I suspect the "new RG-214" coax will have the same problems w.r.t. duplex service as LMR-400 & Belden 9913. Bob NO6B
