The Osram DEH612 is is a dull emitter triode for general purpose applications.
The valve has the Type designation lettering etched into the glass as well as the Osram Valve logo.
See also DEH612 for a slightly later version.
The balloon envelope is 56 mm in diameter, and excluding the B4 base pins is 95 mm tall.
Reference: 1043. Type DEH612 was first introduced in 1927.
Absolute Maximum Operating Conditions¶
Updated May 12, 2016. shape:balloon construction:pinch type:triode age:1920.1930 base:b4 heater:6.0v pins:4 pin:1.a pin:2.g1 pin:3.f pin:4.f