METAL TMC Horned type Triode
Lampe triode à cornes
Handwritten “9 NG” is engraved on the base.
“212” is printed on the bulb.
Triode with two top caps, B4 bakelite base.
Horned tube = Lampe à cornes = Kamerad (these tubes were nicknamed “Kamerad”
in reference to the German soldiers who surrendered by raising their arms).
Horned tubes were first introduced in 1916.
The anode connects to one top cap and the grid to the other, in order to reduce parasitic capacitances
and allow for its use in the shortwave range.
The anode cylinder contains a helical wire grid supported at both ends, and running through
the centre of the anode is a single strand tungsten filament.
The orange color of the bulb is typically from the use of a phosphorous getter.
Fiche technique • Data sheet • Datenblatt:
TMC.pdf
Hauteur • Height • Höhe : 98 mm • 3" 7/8
Diamètre • Diameter • Durchmesser : 54 mm • 2" 1/8
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