to between 25 and 35 ? base impedance. This does not seem to be adverse to operation or matching with a normal 50 ? transmission line, provided the connecting feed is the electrical equivalent of a wavelength at the frequency of operation.

Mobile HF helicals

Another example of the type as used in mobile communications is spaced constant turn in which one or more different linear windings are wound on a single former and spaced so as to provide an efficient balance between

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