All You Ever Needed to Know--and Even More--
About European Tube-Numbering Schemes


Collectors of vintage radios take note: Some popular, identical, tubes had more than 120 different names. But also, some totally different tubes had the same names! Whether you collect "bottles" for their historic interest, or want to restore a European-made radio, you will find something of interest here.

Please see Tube Numbering




Production Dates of  Telefunken Tubes - Code Table


The exact production date is encoded in a two letters code, printed on Telefunken tubes. From January 1930 until December 1968 you can identify all production dates.

Please see Tube Production