🌐EnglishEnglishDeutschFrançaisItalianoNederlandsPolskiPortuguêsSvenskaTiếng ViệtРусскийالعربيةفارسی中文日本語EntityQ1776868· pop 17· linked from 206 articlesspark-gap transmitterdeviceConnectionstransformerEntityresonanceEntityCategoriesElectric arcsElectric power conversionHistory of radio technologyListen template using plain parameterRadio electronicsTelegraphy