?One Pair E210 50-150W 8 ohms Golden Voice DIY Accuphase Modified Version Finished Amplifier boa ??

Parameters:
Supply voltage range = DC + -25V to DC positive and negative + -55V. The recommended voltage is DC + 40V.
Output power RMS = 50-150W 8 ohms
Output voltage gain = pure rear stage output gain VOLTAGE GAIN = 18 times,
Combined output gain of front and rear stages (switchable with front stage output mode) = 100 times
Switch pin pins PREAMP OFF = 1-2 for pure rear output, PREAMP ON = 2-3 Combined output before and after
Quiescent current, adjust IQ TEST test 2 points voltage is 1MV, quiescent current is 13MA
Output DC offset voltage (midpoint DC voltage) <1.5MV (using DC servo circuit) Frequency response range = 20HZ -20KHZ (-0.1 DB). 10 HZ-30K HZ -0.2DB THD + N = 0.005%-0.008% 15W output 8 ohm load 20HZ-20KHZ SR = 20V / US Damping factor = 100 Recommended radiator size = 200g for mono Amplifier wiring instructions: Power supply VCC +, GND, VEE- A total of three wires. Input signal INPUT +-, there are 2 lines of input signal. Output OUT + is connected to the positive pole of the speaker, and GND is connected to the speaker ground. PCB size = 82 * 76MM length and width PCB mounting hole distance = left and right hole distance 74MM. Up and down hole distance 69MM Power tube lateral installation distance = 2SC5200- 2SD669 distance 22MM. 2SD669-2SA1943 distance 22MM Note: The finished boards are all debugged. It is generally not recommended to adjust the quiescent current again during use. If you have very professional experience and want to debug the static current, you need to pay attention to driving the field tube to GS voltage will drop about 150MV after ten minutes of work, caused by thermal negative temperature system. It is recommended to use a high-power tube. The voltage on the first and third pins is about 420 MV, which will rise to 600 MV after a few minutes. When adjusting, you need to measure the quiescent current at the IQ TEST test point after the amplifier works for ten minutes. If non-professionals use it, it is recommended not to adjust it. The finished products are adjusted. The figure below is the waveform obtained after initial adjustment of the E210, and it has been adjusted according to the characteristics and experience of the sound to make the sound more in line with the sense of hearing. Package include One Pair E210 Amplifier Finished Board