121 67 700 450 Chokes to prevent radio-frequency current from tuned circuit from passing through transformer English Rotary spark gap radio transmitter...
English A rotary spark radio transmitter from 1914...
or "series" spark gap consisting of a stack of cylindrical electrodes in series with microscopic gaps between them. English Ship spark gap radiotelegraphy...
English Reginald Fessenden's spark radio transmitter...
coil is connected to the antenna and ground 454 647 356 578 2112 1384 Rotary spark gap 180 737 267 412 2112 1384 Belt driven 100 kW 500 Hz alternator 232...
the coil, produced 20,000 to 40,000 volts 603 123 88 122 1016 749 Rotary spark gap turned by electric motor 649 237 330 95 1016 749 Large crank adjustable...
spark transmitter.jpg English: A 2 kW shipboard quenched spark-gap transmitter manufactured by the Marconi Wireless Telegraph Co. around 1917. Spark-gap...
Rotary spark gap. Photograph taken November 7, 1946. LINAC-216 ( ) Creator InfoField Department of Energy. Lawrence Berkeley National Laboratory. Public...
foot above the ground in the back yard. It is driven by a 1 kW rotary spark-gap transmitter. Moffat has worked stations all over the US with this equipment...
