The D.06 was released in three versions, this one has two white rings and was designed for use as a detector and was released in 1925. The D.06 with two red rings and was designed for HF use and had a higher impedance. The D.06 with two green rings was designed as a voltage amplifier. All types had the 3 V 60 mA filament rating.
The envelope has the D.06 etched into the glass on one side and the Mullard name on the other side.
The remains of the painted white rings can be seen near the top of the envelope. The gettering inside the glass obscures the electrodes. The D.06 has some clear glass and the electrodes are visible.
The base with lead-out wires soldered to the split pins below the composition base.
The balloon envelope is 35 mm in diameter, and excluding the B4 base pins is 86 mm tall.
Reference: 1003. Type D.06 was first introduced in 1924.
Absolute Maximum Operating Conditions¶
Updated April 09, 2013. shape:balloon construction:pinch type:triode age:1920.1930 base:b4 pins:4 pin:1.a pin:2.g1 pin:3.f pin:4.f