All Transistor Equivalent Book Updated -

Finding a reliable transistor equivalent guide is essential for electronics repair, especially when original parts are discontinued

Conclusion:

: Specifically for identifying Japanese-manufactured transistors, this volume focuses on substitutions. It is available on Internet Archive. Online Resources & Cross-Reference Lists all transistor equivalent book

Step 3: Gain Group (( h_FE ))

This is where most substitutions fail. The book often has color codes or suffixes: Finding a reliable transistor equivalent guide is essential

Using the All Transistor Equivalent Book Method:

1. Look up 2SA798: The book says "No direct single replacement. Substitute with two matched 2SA970 or BC560C transistors glued together thermally."
2. Check parameters: 2SA798 = 50V, 100mA, 200mW, high gain.
3. Find modern match: BC560C (45V, 100mA, 500mW) – slightly lower VCEO but acceptable in low-voltage preamp stage.
4. Adaptation: Mount two BC560C face-to-face with heatshrink.
5. Result: Amplifier works perfectly.