0/PDMCreative Commons Public Domain Mark 1.0falsefalse 71 143 99 52 429 286 Righi spark gap, consisting of 4 brass balls with outer ones connected to induction coil...
English Guglielmo Marconi with his first radio transmitter and receiver...
1243 1377 905 461 4440 3065 English: Spark gap for the transmitter 2248 1477 932 511 4440 3065 English: Transmitter coil to produce high voltage pulses...
English Righi spark gap, invented 1894 by Augusto Righi...
0CC BY 3.0 Creative Commons Attribution 3.0 truetrue English French Radio 1897 quantity: 3 URL: https://commons.wikimedia.org/wiki/user:F1jmm Wikimedia...
systems. Marconi used Righi spark gaps like this in his first transmitters. Date between 1897 and 1905 date QS:P571,+1500-00-00T00:00:00Z/6,P1319,+1897-00-00T00:00:00Z/9...
