The flow is held automatically as magically by the association of an iron filament in an atmosphere of hydrogen
OSRAM manufactured this tube for the Kriegsmarine by Telefunken, the Nazi navy in 1943, it is the history of technologies driven by the war
IS 3241
Manufacturing 1943
Tube never used
Characteristics:
3-pin European base
Regulates the 80 milliampere flow between 80 and 250 volts at its terminals. (+ - 7%)
This tube works with the principle "Magic" Fer-Hydrogen, it protects the filaments of the tubes against the over-intensities at the time of the lighting of a radio station for example.
Possibility to group your purchases in tube to save on shipping costs, we question with your intentions.