20W No Feedback DC Pure Class-A Power Amplifier Board
n The original MJ15024,MJ15025 by ON-Semiconditors
n Electrolytic Capacitor signal primary circuit using Taiwan brand names, main filter capacitor electrolytic capacitors with audio dedicated
n Capacitance 2x470UF/100V, ensure powerful stream of support.
n Resistance selection of rings of metal resistance, main circuit using precision metal film resistors ± 1% ring to ensure good signal to noise ratio of the whole board.
n The Board adopts advanced UPC1237 speaker protection circuit, keep your speakers more secure.
n Amp tone was quite unique and well worth a try!
Note: in order to reduce the zealot members install radiator troubles, the Board used CNC machining center carved aluminum radiator plate, but also need to connect the heatsink, otherwise will burn because of insufficient cooling tubes. TEST test points on the Board, white power resistors from 0.22 euro, 22MV TEST point measurement, static is 100MAX2=200MA, X2 is because the tubes in parallel. Measured 130MV, static nearly 1 a. Static current decreases clockwise, counterclockwise static increase
Supply voltage: DC +/-25V ~ +/-35V
Output power: 20W @ 8 Ohm, 40W@4 Ohm, 80W@2 Ohm
Speaker impedance: ohm 2 ~ 8 Ohm