Electron Tube Data Sheets

Tube Number/Type

The tubes included in the database are ordered numerically/alphabetically by their number.

Some tube types may end with an underscore (_) followed by some letters indicating the Brand or a number if the Brand is unknown. The underscore and these letters are not part of the tube type number. This is to distinguish between duplicate numbers for different types of tubes. For Example, 6C9_Maz is the Mazda 6C9, the 6C9_Fiv is the Fivre 6C9.