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冬季DAC 解碼製作班 實況

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1#
kk_ho 發表於 2008-1-9 23:16:16 | 顯示全部樓層
To obtain a low ESR in traditional E.cap (cannot use OS-CON)

using the high voltage cap can do this.

Always found in Japan manufacturer model

KK.Ho (not at HK 2 week....   )
2#
kk_ho 發表於 2008-1-12 01:56:37 | 顯示全部樓層
Cyrus,

PCB DAC:
. The IC provided is CS8414, but the R1 and C3 provided is 1K & 0.047u respectively, not the one highlighted in your powerpoint: CS8418 match with 470 and 0.068u

// We will change the correct value to you. Also for upgrade.

. The C11 value from my package is 0.6h (measured via a multimeter), not 470p as stated on the schematic.

// not understand your question, you can measure the 470pF using our equipment.

PCB IV2:
. R6 & R8 under Schematic is 10K, the value measured from my package is 20K

. C3 & C4 under Schematic is 220u, the value measured from my package and the component list stated is 47u.

// Please bring the components at next class


PCB Power:
. From the Schematic and PCB, there is a L1 mentioned, I found no L1 from my package.

// Admin will follow


PCB REV(R101)
. R2 - R5 under Schematic and the component list is 470, the value measured from my package is 270.
. I found no C3 1000uF from my package

// Admin will follow
3#
kk_ho 發表於 2008-1-16 21:08:35 | 顯示全部樓層
Please bring it at 19-JAN.

Or, you can soldering what you have components into PCB first.

KK.HO
4#
kk_ho 發表於 2008-1-22 01:50:04 | 顯示全部樓層
Tueday night is NOT OK.

Forget need to attend the wedding dinner.

WED is OK.

KK.
5#
kk_ho 發表於 2008-1-23 00:54:52 | 顯示全部樓層
Space is reserved for PCM1798 DAC. Seperated R-CORE for PCM1798 and TDA1541A.

Dual DAC in the box.

DUAL CORE.

Coming soon !

KK.HO
6#
kk_ho 發表於 2008-1-28 17:59:25 | 顯示全部樓層
Updated photo at 26-Jan.

Admin:
Forget to take some of the classmate, he is fully complete the unit.
Don't fire me....

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