400W Power Amplifier Board 1943 + 5200 High Power Rear Power Amplifier Board

Description

The circuit design uses the A970 / C2240 high-withstand voltage audio pair tube dual differential circuit and A1145 / C2705 for voltage amplification to promote the output of the power pair tube A1837 / C4793 in use.
The stage uses A1943 / C5200 high-power Toshiba tube. Wide power supply range, DC positive and negative
20V-50V is all right, as long as enough power is supplied to easily reach 400W. Good sound quality, driving force
Extremely strong, pushing 15-inch speakers without pressure!
Empty board size: 195X60X1.6MM length * width * height
Finished board size: 195X60X45MM length * width * height
Undistorted power: 400W
600W maximum power
Power supply: DC positive and negative 20-50V (recommended voltage -30V0 + 30V)
If you need high voltage (maximum plus or minus 90V), please replace the electrolytic capacitor on the board (change the withstand voltage)
High capacitance).
2P 3P seat pitch is 7.62mm
There is a place mark 2K and 330 on the board, which means that 2K adjustable resistance can be soldered here, and 330 ohm resistance can also be soldered.
104 is a capacitor. 104 * 6 is where 6 components are soldered. 104 = 0.1uF capacitor, 221 is a 220pF capacitor, and 220 and 330 are resistance units. Europe means 104 * 6. All six places are soldered with a 0.1uF capacitor. OUT is the output. 104 represents a 0.1uF capacitor.
Capacitance withstand voltage is 50V
0.22 is 0.22R cement resistance
0.22 is 0.22R non-inductive cement resistance
10 and 68R are 1W watts, 0.22R is 2W watts, and 5W can be 1uF-10uF polyester capacitors and electrolytic capacitors can be welded. We use 4.7uF, electrolytic capacitors should pay attention to polarity, 4.7K large, use 2W 5W will do
Serial number
name
Value
Encapsulation
Quantity
1
Plug-in resistance
20K
1/4W
2
2
22K
2
3
330R
3
4
220R
6
5
3.3K
4
6
1.8K
1
7
10R
1W
9
8
68R
2
9
4.7K
2W
2
10
2K adjustable resistor or 330R resistor
1/4W
1
11
Cement resistance
0.22R
5W
8
12
Electrolytic capacitor
220uF
Ф
10
3
13
100uF
Ф12
1
14
220uF/100V
Ф
15
2
15
capacitor
47nF
Square blue
1
16
0.1uF
9
17
Film capacitor
220pF
DIP-2
3
18
Capacitor or electrolytic capacitor
1-10uF
用4.7uF
1
19
diode
4007
Inline
2
20
4744
DO-35
2
21
IC
A970
TO-92
2
22
A1145
2
23
C2240
2
24
C2705
2
25
A1837
TO-220F
1
26
C4793
1
27
D669
TO-126
1
28
1943
TO-3P
4
29
5200
4
30
Seat
2Pin Blue
5.08
1
31
2Pin Blackl
7.62
1
32
3Pin Black
7.62
1
33
Heat sink
Small heat sink
TO-220
3
34
Big heat sink
long 140mm
1
1 *
400W Power Amplifier Board