): 55 to 160, typically categorized into ranks such as "R" (55–110) or "O" (80–160). 10 MHz to 12 MHz. Equivalents and Replacements (Persamaan)

He turned to the forums, the digital graveyard where old tech wizards congregated. He posted a query: “Need cross-reference for D998 and B778. 80V, 4A, 40W. Driver stage.”

Secara fisik, D998 adalah tipe NPN , sedangkan B778 adalah tipe PNP . Dalam sirkuit, kaki Basis (B) dan Emitor (E) mereka berfungsi simetris, tetapi polaritas tegangan kerjanya terbalik.