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- Marconi first tried enlarging the dipole antenna with 6×6 foot metal sheet "capacity areas" , 1895 Metal sheets and spark balls not shown to scale. (en)
- Early vertical antennas. ' Marconi found suspending the metal plate "capacity area" high above the ground increased range. ' He found that a simple elevated wire worked just as well. ' Later researchers found that multiple parallel wires were a better way to increase capacitance. "Cage antennas" ' distributed current more equally between wires, reducing resistance (en)
- The three 5 ft rotary spark discharger wheels of the "timed spark" system. (en)
- Marconi in 1901 with his early spark transmitter ' and coherer receiver ', which recorded the Morse code symbols with an ink line on a paper tape. (en)
- The temporary antenna used in the transatlantic transmission, a fan-shaped 50-wire aerial. (en)
- 113820.0 (dbd:second)
- Re-creation of Marconi's first monopole transmitter (en)
- British Post Office officials examining Marconi's transmitter ' and receiver ' during a demonstration 1897. The pole supporting the vertical wire antenna is visible at center. (en)
- Hertz's dipole oscillator (en)
- Ordinary inductively coupled transmitter (en)
- Quenched-spark transmitter (en)
- French non-syntonic transmitter used for ship-to-shore communication around 1900. It had a range of about . (en)
- Transmitter building, showing the 36 feedlines feeding power to the 3,600 ft. flattop wire antenna. (en)
- Marconi's first monopole antenna transmitter, 1895. One side of spark gap grounded, the other attached to a metal plate . (en)
- Marconi's transmitting station at Poldhu, Cornwall, showing the original 400-wire vertical inverted cone aerial which collapsed (en)
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