An elementary manual of radiotelegraphy and radiotelephony for students and operators (1916)
Fleming, J. A. (John Ambrose), Sir, 1849-1945 · London, Longmans, Green & co. · leaf 256
Fig. 3. In eases in which bent or directive antennae of Marconisform are employed, then two or more masts have to be erectedto sustain the horizontal portion of the antenna in the requireddirection (see Fig. 3). A very common form of antenna is thatcalled an umbrella antenna. In this case a single… … Fig. 4. and downwards like ribs of an umbrella (Fig. 4). The tower issometimes insulated at the base and forms part of the antenna.At other times the wires are insulated at the top from the tower. Unless the mast or masts are erected in contiguity to somealready existing building or lighthouse, it…
Radio · Telegraph, Wireless · Telephone, Wireless
Internet Archive · University of Toronto, Robarts Library · Public Domain Mark 1.0. Free to use for anything.
