Keywords: Sp xmtr.png spark-gap radio transmitter schematic drawn by me Émetteur radiotélégraphique à ondes amorties Utilisé sur 500 kHz marine Transferred from http //en wikipedia org en wikipedia; transferred to Commons by User Common Good using http //tools wikimedia de/~magnus/commonshelper php CommonsHelper 2006-09-23 Original uploader was K7jeb at http //en wikipedia org en wikipedia Released into the public domain by the author en wikipedia K7jeb circuit original upload log page en wikipedia Sp_xmtr png 2006-09-23 21 37 K7jeb 1248×889× 5335 bytes <nowiki>Spark-gap radio transmitter schematic drawn by me </nowiki> Category Spark-gap transmitter circuits Marine radiotelegraphy |