🌐EnglishEnglishDeutschFrançaisPortuguêsРусскийفارسیEntityQ34085715· pop 5· linked from 7 articlesTM triodeAlso known as Type R (British derivative), Type E (Dutch derivative), Type Р-5 (Russian derivative)French 1915 vacuum triodeWikidata factsImageLoupiote radio 1915.jpgvia Wikidata · CC0Available in 4 languagesРусскийUkrainianفارسیvia Wikidata sitelinks · CC0Connectionsvacuum tubeEntityUnited StatesCountryCategories1915 in France1915 in radio1915 in technologyFrench inventionsHistory of radioVacuum tubes