The VT31 is a directly heated tetrode. The picture shows that the screen grid helix extends well beyond the cylindrical anode. The control grid can be seen in the picture within the g2 helix. The anode is is not painted black or finned for heat transfer and the anode dissipation is about 250 Watts.

See also VT31 and for more details see CV1031.

The balloon envelope is 152 mm in diameter and is 368 mm tall.

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This exhibit was last updated on 08 December 2007