Audion Animation and Tutorial is an interactive animation demonstrating how an audion or triode (a three electrode vacuum tube) works. This learning object created by the National High Magnetic Field Laboratory offers a descriptive text and labeled interactive animation of an audion in which the flow of electrons may be controlled by adjusting the grid voltage.
Type of Material:
This animation is useful in demonstrating the process of how a audion/triode vacuum tube works. This explanation is useful to understand generally how a vacuum tube works and how tube amplifiers work and is suitable for students in basic electricity or audio technology classes.
Standard browser with Java.
Identify Major Learning Goals:
The learning goals of this site is for students to understand how a audio or triode (three electrode vacuum tube works.
Target Student Population:
High school and college level music technology students.
Prerequisite Knowledge or Skills:
A basic understanding of how electrical currents work.
The information in this learning object is accurate. The strength of the animation is in the clarity of the text describing the process and of the animation of the flow of electrons when the grid voltage is altered.
The text mentions that an audion tube is used in tube amplifiers for musical instruments but does not explain how the tube is used in an amplifier to increase the amplitude of the audio signal.
Potential Effectiveness as a Teaching Tool
This learning object has a clear design and use and is highly effective in showing the process of how a audio/triode vacuum tube works. This learning object would be an effective demonstration in teaching students how an amplifier works. It could also be related to a discussion on the flow of electrons in a condenser microphone.
Ease of Use for Both Students and Faculty
The control slider for the grid voltage is easy to use.
Browsers usually want a Java upgrade to run this animation. In some cases you also need to specify a pop-up exception for it to work.
Other Issues and Comments:
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