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The markings have rubbed off this TB2,5/400 power triode valve. It measures 130mm from pins to top cap, and 60mm across. The numbers 229 are marked on the top of the envelope, it was made in Germany, and has 2927 marked on the metal screen at the bottom.

 

Internal view

Base

 .TB2,5/400

Thanks to Edgar Schlimm and Jorgen Lund-Nielsen for identifying this valve

This file was last modified 13:37:02, Thursday September 28, 2006