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[Price]54.44$/ TWO Piece .Finished plate two channels (two have been tested good Class AB Without heat sink)
[Details] Taking into account some friends used the fins and not large enough, now the delivery of the finished board, default static current regulation is 300MA, AB class A class need to be transferred to regulate their own hands;
About:
Reference L10 circuit design, power now effective US ON Semiconductor NIW0302 NJW0381 named L10-1 difference between the original, easy to dislike a friend to buy Toshiba tube, the circuit is the same, 1.6 mm double-sided, high-precision 5 ring resistance, according to which the use of small capacitors capacitors fever supplements, new original US ON Semiconductor (NJW0302 and NJW0281) 6 per channel (excellent control) excitation tube (2SC5171 and 2SA1930) audio on the tube, the circuit design is reasonable, the whole Machine no current sound, sound pure and honest, outstanding detail. CPI performance warm smooth, super general tube amp, the price of civilians have been launched, DIY preferred use for 4-12 inch box.
ON Semiconductor Toshiba tube and pipe contrast, ON tube has a higher analytical, high-frequency performance is better than the Toshiba
With 12 distribution board insulation sheet
The amplifier board a channel one (finished board, has been debugged) , the composition of a stereo amplifier to two, to make a finished product but also with amplifier heat sink and power rectifier board, transformer chassis and other
Basic parameters:
Amplifier board size: 200MM X 68MM
Recommendations input voltage: 28V-45V DC input.
Recommended transformer parameters: AC double 24-35V dual AC output power of 300W over,
Class A output power: 50W + 50W power without distortion 8 ohms
Class A and B Maximum output power: 300W + 300W
Hint:
Power tube fitted between the heat sink and heat sink to use absolutely every other sheet is good, not connected (distribution), as adjusted for the CPI output must increase the heat sink, because the CPI in constant current state, even if small volume when full power is consumed, the heat sink is very high, about 60-70 degrees. Do not touch the radiator, so as not to hurt the soup. The best exposed when installed better heat dissipation fins of the chassis. When adjusting the quiescent current to be careful, to slowly adjust, adjust it, wait a minute, not all of a sudden tune laps, so quiescent current suddenly too large to burn components