Transistor Analyzer (CB21392E)

We found this circuit in a 1967 Electronics World. It analyzes a transistor by determining its type.

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Variable Power Source 1.2V - 25V x 3 A (CB13012E)
The power supply shown in the figure provides output voltages in the range of 1.2 to 25 V with...
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The circuit shown in the figure makes use of an LM3909, a low consumption and low voltage IC. The...