: To minimize heat dissipation across the pass transistors, the circuit uses relays that switch between different transformer taps at specific voltage thresholds (e.g., 8V, 16V, and 24V).
: The final regulation is handled by high-power pass transistors (often 2N3055 or equivalents) mounted on a large internal heatsink. Yh-305d Power Supply Schematic
: A 1N5408 diode (often labeled D1) acts as a safety measure to prevent damage from reverse current applied to the terminals. Reliability and Modifications : To minimize heat dissipation across the pass