Instruction Sheet - 3B SCIENTIFIC PHYSICS U19151 Instrucciones De Uso

3B SCIENTIFIC ® PHYSICS

Instruction sheet

11/06 ALF
1. Safety instructions
Hot cathode tubes are thin-walled, highly evacu-
ated glass tubes. Treat them carefully as there is a
risk of implosion.
•
Do not subject the tube to mechanical stresses.
•
Do not subject the connection leads to any
tension.
If voltage or current is too high or the cathode is at
the wrong temperature, it can lead to the tube
becoming destroyed.
•
Do not exceed the stated operating parame-
ters.
When the tube is in operation, the terminals of the
tube may be at high voltages with which it is dan-
gerous to come into contact.
•
Only change circuits with power supply equip-
ment switched off.
•
Only exchange tubes with power supply
equipment switched off.
When the tube is in operation, the stock of the tube
may get hot.
•
Allow the tube to cool before dismantling.
The tube may only be used with tube holder D
(U19100).
Triode D U19151
The compliance with the EC directive on electro-
magnetic compatibility is only guaranteed when
using the recommended power supplies.
The triode allows basic experiments to be per-
formed using the Edison effect (thermionic effect),
determining the negative charge of electrons, re-
cording triode characteristics and generating cath-
ode rays (model of an electron gun). It also allows
investigating the technical application of a triode
as an amplifier and generating undamped oscilla-
tions in LC circuits.
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 con-
ventional symbol for a triode. A circular metal
plate attached as a backing to the filament ensures
that the electric field between the anode and cath-
ode is uniform.
1
1 Boss
2 4-mm plug for connecting
anode
3 Anode
4 Grid
5 Boss with 4-mm plug for
connecting grid
6 Heater filament
7 Cathode plate
8 4-mm sockets for connect-
ing filament and cathode
2. Description