Music fax AM200 class A power amplifier board + radiator
Using a new original Toshiba power tube (2SA1943 and 2SA5200) 2 pair per channel, 4PCS.
Push the tube is (2SC2073 and 2SA940)
Circuit design is reasonable, sound quality sweet and sweet, the details of outstanding performance. The sound is warm and smooth. Speaker 4-12 inch can adapt
With rectifier filter speaker protection circuit , 25A original import rectifier bridge, UPC1237 speaker protection dedicated IC .
Power amplifier board basic parameters:
Amplifier board input voltage: 24-0-24 to 38-0-38 AC input.
Output power: Class A 40W + 40W without distortion Power Class B Class 200W + 200W without loss of power output.
Output impedance: 4-8 ohms
Speaker protection basic parameters
Using the original European mother dragon silver contact relay, reliable contact
7812 power supply, more stable performance.
Supply voltage:
AC 12-18V 0.2A 3W or so
Through the circuit red light, the circuit normal 3-5 seconds green light. Circuit start,
Midpoint potential drift 1V, protection start
Recommended transformer parameters: dual 28-38V dual AC output power (300W-500W)
Amplifier board size: (with radiator) 230 X 140 X 88, weighing about 1.5 kg
Radiator substrate thickness 9 mm
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