Thermionic Augetron Type A206/7 Secondary-Emission Amplifier
Tube amplificateur ā émission secondaire
This six-stage Augetron was intended to be a high gain audio frequency amplifier.
See also • Voir aussi • Siehe auch :
6-Stage Thermionic Augetron
Longueur • Length • Länge : 164 mm • 6" 1/2
Diamčtre • Diameter • Durchmesser : 53 mm • 2" 1/10
The Augetron has a triode section which consists of a cathode, a grid and an anode with a centre opening, this
opening being directed towards another section, in which secondary emission stages are placed one behind the other.
Diagram showing a five-stage Augetron multiplier.
Secondary cathodes consist of nickel plates in which conical impressions have been formed. The diameter of each
diminishes in the direction of travel of the electrons. This results in a complete inclined surface being
presented to the main electron stream, thus giving a maximum possible collision efficiency. To make sure of
this maximum, successive secondary cathodes are staggered; this is made possible by the construction of the
secondary cathode plates. The lugs with which the cathodes are supported on insulating pillars are eccentrically
disposed in relation to the holes, so that all that is necessary in order to obtain perfect staggering is to
turn the secondary cathode plate 180° round with respect to the preceding one.
The Augetron secondary cathode. The perforations are off-set, as shown by the centre-line.
Complete circuit diagram.
Reference: Van den Bosch, F.J.G. The Augetron and its Applications. The British Institution of Radio Engineers, 1941.
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