In the years before the outbreak of World Warfare I, completely different schemes, as well as Alexanderson’s alternator, were examined to be able to produce steady waves. The Marconi company, among others, had earlier developed spark transmitters. An enchancment of the Marconi system was the rotating spark gap, producing practically steady waves. This new system was first used at Marconi’s large station in Eire and later additionally at Poldhu in England, Cape Cod on the USA’s east coast and Glace Bay in Canada. The primary common wireless telegraph traffic service over the Atlantic was opened between Clifton and Glace Bay on October 17, 1907.

If you need to have a copy of recordings made with our spark transmitter, illustrating: spark transmission utilizing a mechanical interrupter, and simulated synchronous rotary spark gap transmissions for telegraphy; and spark transmissions for telephony, write to the creator and ship $10 to cover the price … Read the rest