索尼前级 SONY TA-E900

hds511688 · 发表于 2020-3-11 11:00

好东东啊！！！！

szwanghua · 发表于 2020-3-11 15:54

索尼前级 SONY TA-E900

枫叶 · 发表于 2020-3-11 19:38

多谢资料！

fdisk0078 · 发表于 2020-3-18 00:06

多谢分享

柳石 · 发表于 2020-3-22 09:04

感谢分享

木鱼也是鱼 · 发表于 2020-3-26 13:18

多谢分享

tx1021 · 发表于 2020-4-10 20:55

谢谢版主

晓阳维修 · 发表于 2020-5-14 17:04

谢谢分享

sony55 · 发表于 2020-5-23 23:40

顶好资料谢谢

fwi297 · 发表于 2020-6-8 14:26

感谢分享

thexxl · 发表于 2020-6-10 22:52

嘎嘎嘎嘎嘎

liuxc · 发表于 2020-7-25 21:50

多谢楼主分享

石佛 · 发表于 2020-7-26 14:35

多谢分享

建新 · 发表于 2020-7-27 14:08

多谢分享

曾经年少 · 发表于 2020-7-27 14:33

感谢分享！

西西密教父 · 发表于 2021-3-21 14:45

The following describes the circuit operation for the headphone amplifier’s Left Channel. The Right Channel
operates identically.
The audio input signal is applied to the input jack (HP31 or J1/J2) and dc-coupled to the volume control, VR1.
The output signal from VR1’s wiper is applied to the non-inverting input of U2-A, an LME49720 High
Performance, High Fidelity audio operational amplifier. U2-A’s AC signal gain is set by resistors R2, R4, and R6.
To allow for a DC-coupled signal path and to ensure minimal output DC voltage regardless of the closed-loop
gain, the other half of the U2 is configured as a DC servo. By constantly monitoring U2-A’s output, the servo
creates a voltage that compensates for any DC voltage that may be present at the output. A correction voltage is
generated and applied to the feedback node at U2-A, pin 2. The servo ensures that the gain at DC is unity.
Based on the values shown in Figure 28, the RC combination formed by R11 and C7 sets the servo’s high-pass
cutoff at 0.16Hz. This is over two decades below 20Hz, minimizing both amplitude and phase perturbations in the
audio frequency band’s lowest frequencies.

HIFILSY · 发表于 2021-3-25 10:26

索尼前级没倒闭么

jackclubbbs · 发表于 2021-3-27 00:45

这个前级好贵的。60W

win2008 · 发表于 2021-3-27 00:58

谢谢分享。

电子爱好制作 · 发表于 2021-3-29 22:52

多谢分享

[名机资料] 索尼前级 SONY TA-E900