Spark Gap

Equivalent circuit of a valve-type arrester - 1 spark-gap, 2 load resistance, 3 spark-gap capacitance, 4 earth capacitance ❋ Frank Ponemunski (1991)

All she had to do was find a radio—or even make a simple spark-gap transmitter out of a battery and a wire—and send an SOS. ❋ Jerry Oltion (1990)

The powerful sparks that were leaping across the spy's spark-gap told him that a battery of considerable force was being used, and he knew that ❋ Lewis E. Theiss (N/A)

The earth-end would be attached to the telephone receivers and to the apparatus, consisting of a spark-gap wheel and other instruments designed to send into space the electrical impulses that could be broken up into dots, dashes and spaces, spelling out words according to the Morse or Continental code -- whichever was used. ❋ Howard Roger Garis (1917)

Almost immediately after Dawson disappeared the crash of the spark across the spark-gap and up the wires was heard. ❋ Unknown (1895)

The crashing of sparks over the spark-gap had ceased for the present, and Joe, reporting that there was no wireless craft within reach of his limited aerials, was on deck once more, waiting until the time should come around for another trial. ❋ Unknown (1895)

In the meantime Joe, at the powerful sending apparatus below, sent the spark leaping across the spark-gap, and, dashing up the aerials, there shot into space the electric waves intended to be gathered in by any other wireless operator within fifty or sixty miles. ❋ Unknown (1895)

The crash of his call soon sounded at the spark-gap and quivered on its lightning way up the aerials. ❋ Unknown (1895)

Guglielmo Marconi proved that transmission of electromagnetic waves over a large distance was possible using a spark-gap generator. ❋ Bill MacDermott (2010)

Some of the non-functioning ones will only be that way because the spark-gap has eroded to where it is too wide to spark across. ❋ Unknown (2009)

• the ignition coil of a motor engine acts as a spark-gap generator, resulting in interference on the radio, or ❋ Bill MacDermott (2010)