Brand

•  CIFTE
•  EUROPE
•  FIVRE
•  GECOVALVE
•  MARQUES DIVERSES / VARIOUS BRANDS
•  MINIWATT DARIO
•  RADIOTECHNIQUE
•  REFLECTOR
•  RTC
•  SIEMENS
•  TELEFUNKEN
•  TUNGSRAM
•  VISSEAUX

Interests

•  Audiophiles
•  Collectors
•  Radio hams

Socket

•  B5A - Subminiatur (5 wires in line)
•  B8A - Rimlock (8 Pins)
•  B8G - Loctal 8 pins
•  B9A - Noval (9 pins)
•  B10C - Decal
•  K8A - Octal (8 pins)
•  Y8A - German Steel

Heating parameters

•  1.2 to 1.4V
•  6.3V
•  12,6V
•  14V
•  21V

Décennie

•  1930
•  1940
•  1950
•  1960

Connection on the top

•  With
•  Without