((摩机心得No.3))~~P L M M 操刀全面改造旧CD机之超级时钟全记彔

Ep-71

原帖由 mobilest 于 2006-3-12 14:34 发表


[s:14][s:14]下回再上其他的女发烧友....[s:97][s:97]

好~!!![s:17][s:17][s:17][s:17][s:17][s:17][s:17][s:17][s:17][s:17][s:17][s:17][s:95][s:95][s:89][s:89][s:17]

mobilest

交易区新帖推荐

原帖由 tunetech1960 于 2006-3-12 15:42 发表

[s:15][s:15]

喜欢音乐味？加檀木板迷死你，这是剧毒。

[s:97][s:97]

[s:17][s:17][s:17][s:17]快來毒我八....一定要黒檀拼板加紫檀实板才毒的死....一次毒死省得摩机!![s:17][s:17]

[ 本帖最后由 mobilest 于 2006-3-12 16:38 编辑 ]

linn12

原帖由 mobilest 于 2006-3-12 14:34 发表


[s:14][s:14]下回再上其他的女发烧友....[s:97][s:97]

[s:14][s:14]些贴为证[s:14][s:14][s:14][s:21][s:37]

mobilest

Jitter is noise. Not voltage noise but time noise. If you vision a D/A converter with a low frequency output, or even a DC output, it is obvious that the voltage reference of that D/A converter is important in order to have a low output noise. The noise of the voltage reference is added to the output signal. Maybe your D/A converter has a S/N ratio of 100 dB, but your reference has only 80 dB, so the resulting S/N is 80 dB, and you are nottaking full advantage of your D/A converter's potential.
Imagine a D/A converter with a high transient content, i.e. jumps from full plus to full minus in 2-3 samples. Now the voltage reference is not so crucial. In transient heavy signals the time reference comes in scope as the bottleneck for D/A performance, in exactly the same way as your voltage reference for low frequency signals.

In audio players the typical D/A converter has a performance level of around 100 dB. The reference voltages are kept clean to accomodate this performance, using high grade regulators and big capacitors. However the clock signal or time reference is overseen in almost all players, even the more costly ones. Often cheap oscillators with a signal to noise ratio of 70 - 80 dB are seen in supposedly well built players.

转文

Pure Clock可用於任何的訊源及DA系統上，取代原本電路使用之高誤差、低準確度石英振盪器，讓數位晶片工作在精準穩定的時脈下，獲得乾淨、低雜訊及低Jitter之輸出訊號。

Pure Clock之精準時基來源是TCXO(溫度補償型振盪器)，振盪器之頻率溫度誤差係數為±1ppm，為目前等級最高之TCXO。

由於振盪器為一敏感元件，Pure Clock採用與大廠相同之電路小板懸掛方式，並以O型環隔絕外部之振動，避免轉盤之馬達振動或其它外部振動影響TCXO的準確時基。

電源濾波線路使用L-C-L迴路濾波並以LM317穩壓至5V，在TCXO電路小板上再以L-C-L迴路濾波一次，確保TCXO工作在最高品質的電壓。

[ 本帖最后由 mobilest 于 2006-3-13 14:37 编辑 ]

mobilest

利用同曲目钢琴声调整CD机下脚钉位置

mobilest

交易区新帖推荐

EP兄,,buffer是64K的MN4264~~

ouma007

从mm 的手相看，纹路曲折而细密，可见心思敏锐，情感风骚，二位莫要走火伤身[s:14][s:14][s:14]

wvwvwv

留那么长的指甲还能弹钢琴？不可能吧！
除非是假指甲。

闽中龙

MM漂亮啊,我怎么不认识这样的发烧MM啊.[s:97]

griskin

热~~~~~~

mobilest

原帖由 ouma007 于 2006-3-13 17:23 发表
从mm 的手相看，纹路曲折而细密，可见心思敏锐，情感风骚，二位莫要走火伤身[s:14][s:14][s:14]

[s:14][s:14]我被烧伤了....[s:18][s:18]

这MM可真是发烧友,,ouma007兄你知道那是去年上海烧友会时你门就见过的呀!!

edward

PS的图片来骗人吧！

pmc2003

原帖由 锡兰红茶 于 2006-3-12 00:16 发表
这是台什么机器，应该是CDM4的机心吧，看到了7350

这台机我没眼花看错的话应该是非利蒲950[s:99][s:99][s:99]

mobilest

原帖由 pmc2003 于 2006-3-13 20:34 发表

这台机我没眼花看错的话应该是非利蒲950[s:99][s:99][s:99]

该改都改了....

ouma007

原帖由 mobilest 于 2006-3-13 18:33 发表


[s:14][s:14]我被烧伤了....[s:18][s:18]

这MM可真是发烧友,,ouma007兄你知道那是去年上海烧友会时你门就见过的呀!!

哈哈，每次到你那里看到的MM 都不同，我早就不记得是那个mm了。

本来是抱着HIFI学习心态去发烧的，每次看到PLMM 在现场，口水只能偷偷往肚里吞，苦也[s:16][s:16][s:16]

不知道是去发烧，还是“发骚”，唉，这样的聚会少参加也罢[s:6][s:6][s:6]