I mean RT (La Radiotechnique)that Became later RTC (Radio Technique Compelec).
Tubes are engraved FRS, made in the cities of « Suresnes« and « Joué les Tours » (France)They made RT and RTC tubes for French military, labs, industry, national rail (transport by train) and so on.
Since 1947 they were part of the Philips that sent parts of their machinery group and made tubes under the Miniwatt Dario name but also their own tubes. They also exported tubes under Impex and sometimes Impex Dario in Great Britain.How is it possible RTC and Philips sounded different ? I don’t know.
Tubes are engraved FRS, made in the cities of « Suresnes« and « Joué les Tours » (France)They made RT and RTC tubes for French military, labs, industry, national rail (transport by train) and so on.
Since 1947 they were part of the Philips that sent parts of their machinery group and made tubes under the Miniwatt Dario name but also their own tubes. They also exported tubes under Impex and sometimes Impex Dario in Great Britain.How is it possible RTC and Philips sounded different ? I don’t know.