![]() ![]() We’ll take braided copper cable, all right? The Insulation If possible, use braided cable consisting of several thin conductors. Frequentie MHzīy using several small conductors in a cable, the surface area is increased while the total cable diameter remains limited. Just look at the table below where we take three different conductors and show the resistance per meter at different frequencies. The higher the frequency, the greater the skin effect. For direct current the diameter of the conductor is important but for HF currents the surface of the cable is important. ![]() This phenomenon is called the Skin effect. HF currents have the property of running mainly on the outside of a conductor. That is indeed true for direct current, but for HF other laws apply. This makes it obvious to use a thick copper cable which has a low resistance after all. By keeping the resistance in the antenna cable low, the energy is fully radiated instead of converted into heat. Of course it may be clear that the best antenna litz can be used with a low resistance.
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