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The CV354 disc seal triode was based on the VX3019. The TD03-10 has a 10 Watt dissipation that matches the CV354 specification.

The literature from the post war era gives the DET23 from M-OV and Mullard TD03-5 as equivalents but these two valves have a maximum of 5 Watt anode dissipation.

This physically small disc seal valve has co-axial connections. The heater and cathode are opposite the main envelope. The grid has a circular connection to the flat internal metal mesh. The anode appears to be copper and has a flat surface facing the grid.

A grounded grid configuration would allow for a two cavity mechanical design.

The grid is a set of fine wires stretched across a circular opening. The cathode and anode are both end in flat circles placed very close to the grid. The about page (top left logo on home page) has close-up images of the grid.

The planar envelope is 15 mm in diameter and, tip to tip is 60 mm tall.

References: Data-sheet. Type CV354 was first introduced in 1954. See also 1954 adverts.

Absolute Maximum Operating Conditions^¶

Thanks to Frank Philipse for supplying the above PDF datasheet.