Quick Answer: The Transistor Characteristics Apparatus is a panel for plotting the input, output and transfer characteristics of NPN and PNP transistors. It has a variable regulated 0–15V DC collector supply and analog meters for voltage and current.
Last updated: October 2026
Key Features
Onboard mounting for NPN and PNP transistors
Variable regulated DC collector supply, 0–15V
Analog voltmeters with 1.5V / 15V DC ranges
Analog ammeters with 10mA / 250µA DC ranges
4mm shrouded, colour-coded sockets on a Bakelite panel with silk-screened circuit schematic
Technical Specifications
Specification
Value
Collector supply
Variable DC regulated, 0–15V DC
Voltage meters
Dual analog, 1.5V / 15V DC
Current meters
Dual analog, 10mA / 250µA DC
Transistors
Onboard NPN and PNP mounting
Sockets
4mm shrouded, colour-coded
Panel
Bakelite with silk-screened circuit schematic
About This Product
Students set the base and collector bias, read the meters and plot the input, output and transfer curves of a transistor. From these readings they work out the alpha and beta parameters for both NPN and PNP types.
Frequently Asked Questions
Can this Transistor Characteristics Apparatus test both NPN and PNP transistors?
Yes. The panel has onboard mounting for both NPN and PNP transistors, so their input, output and transfer characteristics can be plotted.
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