Abstract
My contact with interference, particularly mobile interference, dates back to 1946 when The Columbia Gas System Operating Companies first started mobile radio installations. Interference problems usually start with the first installation. For about eight or nine years, our companies had varying amounts of interference troubles, and we firmly believed that the thing to do to correct such conditions was to complain loud enough and long enough and the radio vendor would come up with some answers. Each year we had more mobile units, and exposure to interference increased. Channel loading was also increasing, and narrow band sets were getting closer and closer, potentially increasing interference.
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