Triode D, Vacuum

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Experiment Topics:_..

The following topics can be discussed with this highly evacuated tube:
• Edison-Richardson-Effect, thermionic emission
•  Determining the negative charge of electrons
• Recording triode characteristics
• Triode as an amplifier
•  Undamped oscillations in LC circuits

Product Information:_..

The triode is a highly evacuated tube with a pure tungsten heater filament (cathode) and a round metal plate (anode) with a wire grid between them, all inside a clear glass bulb. The cathode anode and grid are all aligned parallel to one another. This planar configuration corresponds to the conventional symbol for a triode. A circular metal plate attached as a backing to the filament ensures that the electric field between the anode and cathode is uniform.
The triode allows basic experiments to be performed using the Edison effect (thermionic effect), determining the negative charge of electrons, recording triode characteristics and generating cathode rays (model of an electron gun). It also allows investigating the technical application of a triode as an amplifier and generating undamped oscillations in LC circuits.

Specifications:_..

Filament voltage U_F:	max. 7.5 V AC/DC
Filament current I_F:	3 A approx.
Anode voltage U_A:	max. 500 V
Anode current I_A:	( @ U_A = 400 V, U_F = 6.3 V DC )
	Grid voltage U_G:	Anode current I_A
	0 V	0.4 mA approx.
	+8 V	0.8 mA approx.
	-8 V	0.04 mA approx.
Total length:	300 mm approx.
Glass bulb:	130 mm Ø, approx.