The DY2020 is a directly heated triode on a B4 base.

The filament is a single inverted V that is tensioned by a thin top spring. An interesting point is that in addition to the two notched grid support rods, two other rods can be seen to pass vertically through the anode and within the grid. These rods are not connected either electrically or mechanically and their function is not clear.

The balloon envelope is 46 mm in diameter, and excluding the B4 base pins is 88 mm tall.

 
Absolute Maximum Operating Conditions

Triode	Vh	Ah	Va	Vg	mAa
	2.0	-	150	-	-

This exhibit was last updated on 08 October 2006