Elenco Projects 306-511 - Manual (Page 39)

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Project #409
OBJECTIVE: To build a circuit that checks the transistor.
Set the meter (M2) to the LOW (or 10mA) setting. Turn on the switch
(S1), the meter does not move. Press the switch (S2), the meter
deflects and points to 10. This indicates the transistor (Q2) is GOOD.
The meter would only deflect a little or not at all for a BAD transistor.
Transistor Tester
Project #410
OBJECTIVE: To make an adjustable current path.
Set the meter (M2) to the LOW (or 10mA) setting. This circuit is a
simple voltage divider. When the adjustable resistor (RV) is set to the
far right, the voltage across the resistors (R4) and (RV) are equal.
Adjust resistor (RV) to the left, the meter deflects less, as the voltage
decreases.
Adjustable Voltage
Divider