The board is:
Mono, without rectification circuit After the power amplifier board, you need two channels, please buy 2 pieces.
The circuit design uses A970/C2240 high-voltage audio pair tube double differential circuit and A1145/C2705 for voltage amplification.
Promote the use of medium power to tube A1837/C4793, the output stage uses A1943/C5200 high power Toshiba tube.
Wide power supply range, DC positive and negative 20V-50V can be
As long as you have enough power to easily reach 300W
The sound quality is good, the driving force is very strong, and the 15-inch speaker is pushed, without pressure.
Power amplifier board size: 145*60*45mm
Real power: 300W
powered by:
DC positive and negative 20-50V (recommended voltage: -30V 0 +30V)
If you need high voltage (maximum plus or minus 90V), please replace the electrolytic capacitor on the board (change the high voltage capacitor)
2P 3P's seat pitch is 7.62mm
10 = 0.22 = 0.22R 10 ohm resistor cement resistor 104 = 0.1uF capacitor 68 = 68 = 220 ohm resistor 220 Ohm resistor
3K3=3.3K resistor
104*4=0.1uF*4 221=220pF capacitor
0.22 is 0.22R non-inductive cement resistor
10 and 68R are 1W watt resistors 0.22R is 2W watts, and 5W can be
1uF-10uF polyester capacitors and electrolytic capacitors can be soldered, we use 4.7uF, electrolytic capacitors should pay attention to polarity, 4.7K large, with 2W and 5W
Need product logistics list, please contact customer staff to extract.
Mono 300W power amplifier board 1943+5200 high power amplifier board PCB empty version
