Product description:
The original Toshiba 2SA1943/2SC5200 and MJE15032/MJE15033 are used.
Direct coupling mode without coupling capacitor is adopted for interstage coupling, 10000UF/80V * 4 electrolytic capacitor is adopted for main filter circuit, and other signals are
The five ring metal resistance is selected as the resistance, and the five ring metal film resistance with an accuracy of ± 1% is used as the main circuit to ensure a good signal-to-noise ratio of the whole machine.
The PCB is made of 1.6mm thick double-sided board, 2.0 amperes copper thick, and the whole process of tin spraying to ensure the good passing performance of large and small currents. First class PCB quality.
The most important feature of this board is that it uses the current advanced C1237 BTL horn protection circuit to effectively eliminate the impact of power on and off and DC output protection function, making your horn safer.
Parameters：
Power parameters: main AC: double 35V or double 43V 400W relay protection power: single AC12V or single AV15V
Power: 350 W (THD+N<0.05%), double AC43V, 4 Ω
Measured under Class A 90W and 4 Ω load
Horn impedance: 4-8 Ω.
Size: 353 L * 100 W * 65MM H
The static current of the big tube is 100MA: adjust the adjustable resistance VR2 (1K) to make the voltage at both ends of 5W/0.5R be 50MV, at this time, the static current I=50MV/0.5R resistance is 100MA; If the customer's heat sink is large enough, the quiescent current can be increased. Generally, 100MA-300MA has the best sound effect.
2SA1943 2SC5200 large transistor pairing
Package included:
1x Mono power amplifier board
