Losses in Twisted Pair Transmission Lines at Radio Frequencies

It is generally believed that the losses in twisted pair transmission lines at radio frequencies are high, but the magnitude of the losses at frequencies between one and fifteen megacycles is perhaps not so well appreciated. This discussion deals with the use of several kinds of twisted pair conductors available in the market, when used as transmission lines between an antenna system and a radio receiver. The conductors tested are frequently used for this purpose, but were not designed or intended for use at these frequencies. They are commonly used for 110-to 220-volt direct- and alternating-current house lighting and appliance requirements, telephone drops, high tension ignition, etc.