Amazon.com: PNP NPN Transistors Kit, Three Pins Silicon Power Transistor Assorted Assortment Box Set Range 2N3904-MPS2907, 10Value,Pack of 200, Ltvystore : Industrial & Scientific
PNP NPN Transistor Meter, 0.01ohms Resolution 20mA Working Current Automatic Detect Wave Signal Generator LCD 2 Decimal Values for Signal: Amazon.com: Industrial & Scientific
Transistor Tester DIY Kit DC 6.8‑12V with PWM Square Color Screen, ESR Volt Frequency Meter for NPN PNP Transistors, Field Effect Transistors, Diodes: Amazon.com: Industrial & Scientific
Transistor Tester, Multi-Functional Inductance Capacitance Resistance Electronic Meter TR LCR ESR for NPN and PNP Bipolar Transistors: Amazon.com: Industrial & Scientific