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Roland, Thanks for the information. Now I know there isn't much B or C in them! Shows you how much I know about superconductors. Looks as though all interference sensitive transmissions benefit from the technique. Since CDMA has power control sytems, it might benefit disproportionately compared with TDMA and analogue transmissions. Regarding cancer risk, again I have to plead ignorance, but I assume there is a correlation between the % of emr absorbed and dna damage. For example, xrays, which do cause cancer, are partly absorbed and the longer the wavelength, the less the absorption. Is there an area on the spectrum where there is no damaging absorption? Visible light is getting pretty safe. So by the time you get to 15 cm, pcs frequencies, it must be so close to harmless it doesn't matter. But all visible light is absorbed, so that idea must not be quite the mechanism for the cellular damage. By reducing the power output needed from handsets for the signal to be received by the base station, any risk must be proportionately reduced. They use helium apparently. Why not nitrogen, which is cheaper? Spectrum efficiency is going to be one of the main determining factors on the relative success of the competing wireless technologies, so this superconductor business should be an essential component of a properly designed system. Maurice |
