Looking at the of the transistor (the side with the text/part number facing you) with the pins pointing downwards, the order from left to right is: Pin 1: Base (B) – Receives the input signal.
Masukkan kaki-kaki transistor ke lubang PCB, lalu solder dengan timah berkualitas baik. Pastikan tidak ada jembatan timah ( solder bridge ) antar kaki B, C, dan E. 4. Pengujian Awal (Testing)
These transistors are designed for high-voltage and high-current environments, making them ideal for driving 45–50W audio systems. D998 (NPN) B778 (PNP) Silicon NPN Power Silicon PNP Power Package TO-3P / TO-3PML TO-3P / TO-3PML Max Voltage (Vceo) Max Current (Ic) Power Dissipation (Pc) Current Gain (hFE) 55 – 160 80 – 160 Installation Guide
Power up the circuit slowly using a variable AC transformer (Variac) or a dim-bulb tester to monitor for excessive current draw before connecting speakers.
: Because they dissipate up to 80W of power, they generate significant heat. It is critical to: Mount them securely to large aluminum heat sinks .
Ini adalah pengganti yang paling populer dan setara. Karakteristiknya mirip dengan voltage dan power yang hampir sama.
Dengan kemampuan 80 Watt dan arus 10 Ampere, pasangan ini ideal untuk amplifier kelas AB dengan daya keluaran sekitar 45 hingga 50 Watt RMS per saluran. Meskipun banyak yang menyebutnya sebagai Darlington , perlu diketahui bahwa D998 dan B778 transistor Darlington, melainkan transistor bipolar biasa (BJT).