2008多項課程召集 - (1) 春季 DAC 原理和製作班 （完滿結束）

各 DAC 學員請留意, 本星期五7:30pm會開始測試已完成的DAC

另外3月21日 10:00am 加堂裝機箱, Tube buffer 等等


FULL HOUSE


已確認報名者 (如已正式報名和交款者不在列表中請電郵給我們 admin@hififever.com) :
chc51 (Hi-end MKII)
AP (Hi-end Tube Output)
Mr. Ng (Hi-end Tube Output)
chariot (Hi-end MKII)
likylam (Hi-end MKII)
herman (Hi-end MKII)
tm (Hi-end MKII)
kun (Hi-end MKII)
Sam_Sam (Hi-end MKII)
patnsh (Hi-end MKII + tube output)
to3282000 (Hi-end MKII)
bcheong (Hi-end MKII)


為了迎合大家需求, HiFi Fever 從2008年開始會以召集型式開設工作坊, 砌機課程等等. 最先達到最少報名人數要求的便先行開班! 大家留名時亦可說出自己的特別要求, 我們會儘量配合!

第一項課程 - 春季 DAC 原理和製作班

DAC 課程包括套件: TDA1541, PCM1798 等等


名額: 每班最少8名最多12名
日期:
7/Mar (Fri) 7:30pm-10:00pm (理論, 試機, 認識零件)
8/Mar (Sat) 2:30pm-8:00pm (組裝)
14/Mar (Fri) 7:30pm-10:00pm (組裝, 測試)

套件1: Performance DAC (1541A或1798)
包括: 1541 DAC PCB, 中檔零件, 高級R型變壓器, 小型機箱
價格: $1080 包套件和課程

套件2: High-end DAC MKII (1541A) (只限5套)
包括: 1541A DAC PCB, 中檔零件, 高級R型變壓器, 小型機箱
價格: $1380 包套件和課程

套件3: High-end DAC Tube (1541A) (只限2套)
包括: 1541A DAC 電源板, 1541 I/V板, LPF板, 輸入選擇板, 主解碼板, 中/高檔零件, R型變壓器, 17" DAC 機箱, Tube Buffer 輸出
價格: $2280 包套件和課程

地點: 荃灣沙咀道29-35號科技中心9樓910室
Map: http://www.hififever.com/forum/files/thumbs/t_map1_184.jpg

報名: http://shop.hififever.com/product_info.php?products_id=291



課程內會教你 :

1. DAC 基本原理
2. DIY DAC 的 Tips
3. DAC 晶片的發展 (由1986至今), 不同品牌的特性
4. 怎樣在CS8414 Re-Clock?
5. CS8414 外的其他選擇
6. Non oversampling VS Oversampling, 那個較好?
7. SRC (Sampling rate converter)
8. TDA1541 的電源部份重要嗎? 為什麼?
9. 怎樣調較TDA1541? Un-documented application note.
10. 怎樣調較接收晶片?
11. DIY Layout Tips
12. Analog部份LPF和膽輸出討論
13. 怎樣最佳化各部份的零件
14. Upgrade Tips (五大類)
15. 安裝Tips
16. 測量和改善
17. 真Balance輸出的做法 (不是用opamp +/- 輸出的假Balance), 首次在DIY市場上出現.

Hi KK,

How can I mod my DAC to become NOS?

Regards,
Chris

[quote:68f24c01bd="kk_ho"]FYI....

Any problem, call me[/quote]

Thankyou sir ^=^

歷奇

Hi KK,

No too much, I got some cables to reconnect. Some holes to drill (as I done it incorrectly last time), and test the tube buffer. Could I come at office hour during the CDM9 course, therefore, I could finish it first before the CDM9.

Thanks.

B Cheong

FYI....

Any problem, call me

KK sir；

唔好意思，想問多次 AES/EBU 輸入果個綱頁，因我上ti.com找唔倒！？

Thankyou so much ^=^

歷奇

BC,

Which part are not complete?

If not too much, you can do this at CDM9 together.

K Sir.

KK sir,

Let me know if there is a chance to complete my DAC from 12 to 16 April. I could come on office hour. Thanks.

Hi william sir ;

請問粒 upgrade Re-Clocl 幾時返貨？
請通知聲！Thankyou ^=^

歷奇

Hi william sir ;

請問粒 Re-Clocl 幾貨？

雖然困難重重, 但得到的都不少

1. 可以得到kk幫忙 / 指導 - 我會俾心機搞好佢
(原來kk同我係中學校友, 多謝師兄) :wink:

2. 還有, patrick大哥的分享經驗  
3. 見識到其他同學的"藝術品" - "屋仔起得好靚呀"

kk, 遲少少我搞埋手尾, 再約您 :!:

再一次同各位同學仔, william, kk 講多謝

所有人注意:

過埋今晚,再約就只可係星期日,閒日及逢星期六可能性係零

今晚6時30分到11時為止

差DD安裝線的就快手小小

差好遠的…我再諗諗

K哥之王上


[quote:d79caf8f1b="likylam"]Dear KK sir；

是今天6:00 pm 繼續嗎？
Thankyou ^=^

歷奇[/quote]

Photo II

Photo for DAC class III

Dear KK sir；

是今天6:00 pm 繼續嗎？
Thankyou ^=^

歷奇

Thanks for attend the TDA1541A MKIII DAC class.

Will post the photo later.


Next :
TDA1541MK4............ Coming at early summer.....

KK Sir,

請問 24.576MHz 晶振明天有得攞未? 如果有我才搬機上來改 Re-clock。
另外大黑板的 Signal Select Board 上的 "Signal" LED 唔着，是否要把 DAC Board 的 J18 和 Signal Select Board 的 J7 駁埋先會着燈呢?

o架仔上

likylam,

Wait you la...

No problem la

But....
"你地住機先，留返個位我"

寫好小小, 我無所謂, 明你講乜
有D人吾明如 "前乜加仙" 影相佬+口號創作佬見到又儍架嗱

K Sir

KK,William;

明天長週要返工，我想四點後先可到，唔好意思！
你地住機先，留返個位我。

謝謝^=^

歷奇

Yes, this Sat will be the final date for DAC assembly

Time to start: 10:00am
Time to end: depends....

BCheong,

Coming SAT is OK (full day + night). But I need to confirm with Admin there are any Cable class at that day.

Please wait Admin feedback.

KK

KK Sir,

Thanks very much for all your help in the past few weeks. I could see how hard you tried to help fools like me to construct a DAC. I really really appreciate your work. The DAC is great and I turned on my amp everyday since then. Further, I am looking forward to joining the CD workshop in the near future.

By the way, what time will the session start this saturday? I need to complete my tube buffer. On the other hand, I have damaged the sample DAC board last time, I think I need to pay for it this time.

Cheers.

BCheong

[quote:a61205a780="likylam"]Hi William sir,

請幫我准備機內AES/EBU用的110 Ohm線及有關零件，

Thankyou ^=^

歷奇[/quote]
Hi KK & William,

I want those 110 Ohm cable & components for balanced digital input too.  Thanks.

Andy

William,

Let me handle for the 110 ohm cable.

KK.

Hi William sir,

請幫我准備機內AES/EBU用的110 Ohm線及有關零件，

Thankyou ^=^

歷奇

KK,

My DAC is working. Thanks for your help.

Chris

Hi BCheong,

You're welcomed.  I've finished soldering the PCB but not tested yet.  Will go to HiFi Fever now to do some metal works and attend the CD transport test.

Andy

AP,

Thanks very much for your information. You have finished your board?

BCheong

Hi bcheong,

D203 IN4001 <- IN4007
D204 IN4001 <- IN4007
D205 IN4001 <- IN4007
D206 IN4001 <- IN4007
C218 103uf  <- 104 = 100000pF = 100nF
C219 103uf  <- 104 = 100000pF = 100nF
C220 104uf  <- 104 = 100000pF = 100nF
C221 104uf  <- 104 = 100000pF = 100nF
C215 1uf  <- not required

R216 150K <- 6K8
R217 6K8  <- 150K
C212 100uf <- 22uF
C213 47uf <- not required

C201 = C202 104uf <- 104 = 100000pF = 100nF
R201 = R202 1M
R203 = R204 1M
R213 = R214 6K8
R205 = R208 10K
R206 = R207 10K
R211 = R212 680R
R209 = R210 100R
C203 = C204 220pf
R1 ?  <- short by wire
R2 ?  <- short by wire
C205 = C206 1000pf
C207 = C208 4.7uf/100V
C7 = C8 680p
R221 = R222 1M

U1 ? <- IC NE555 (7555)
R20 ? <- 1M (1/4W)
R21 ? <- 47R (1/4W)
C11 ? <- 22uF ~ 47uF
D11 ? <- IN4007
DELAY ? <- RELAY: Do not solder the provided relay (OMI-SH-205L) at the moment as there is a problem with the driving circuit, KK will follow up.

[quote:a1bafe5014="chariot"]我都想明天完成我的DAC。

Chris[/quote]

Me too !

我都想明天完成我的DAC。

Chris

Hi William,

請問砌大機箱的同學可否照常上課呢？ 我的黑板還未開聲啊!

Dear all,

Sorry that tomorrow supplementary need to be postponed to next Sat (29th Mar) due to some cases and components are not ready before the holiday

各學員對不起, 因部份機箱零件在假期前未趕及到來, 所以明天的加堂要順延至下星期六 (3月29日), 敬請原諒

KK Sir,

Sorry to bother you again, I need to assemble the tube buffer at home and bring back to assemble at Friday after 6:00pm. May I have the figures for the components?  I have attached my portion for your reference.

D203        IN4001
D204        IN4001
D205        IN4001
D206        IN4001
C218        103uf
C219        103uf
C220        104uf
C221        104uf
C214        6800uf
IC201        LM317T
R219        220r
R220        910r
C215        1uf
C216        4700uf
C217        10uf

D201        MR760
D202        MR760
R216        150K
R217        6K8
R218        3K6
C211        47uf
C212        100uf
C213        47uf

C201        104uf
R201        1M
R203        1M
R213        6K8
R205        10K
R206        10K
R211        680R
R209        100R
C203        220pf
R1        ?
R2        ?
C205        1000pf
C207        4.7uf/100V
C7        680p
R221        1M

U1        ?
R20        ?
R21        ?
C11        ?
D11        ?
DELAY        ?




Thanks very much for your help!!

BCheong

Kun,

Sorry, I erase your message.  

But your problem can be solve.

Admin,
how to recover?

KK

Charge / discharge problem across the output cap.

You can adding a relay board to solve this. I remember I have this....

Let me check at Fri..

20KHz cut off.

All,

See the diagram and result below.

All are the REAL result from circuit simulator.

有根有據吾係吹

Powered by Texas Instrument TINA SW.

You can downalod this SW (Free) by following link:

http://www.tina.com/

KK.Ho

Hi KK Sir,

I could not come on the coming Friday, I could only arrive after 6:00pm. How long will you stay? Since I need to complete all the component first may I have all the values for the tube buffer circuit diagram?

By the way, the testing at home is very good, thanks a lot for your help.

Thanks.

KK Sir,

我是砌「大阪」的「日本人」，想請問一下，你上次在 I/V & LPF 線路圖上刪除的電阻及電容，它們原本的作用是甚麼呢? 如果我想同時設有 tube buffer 及 op-amp 輸出，是否要裝回這些零件呢?

謝謝!

Dear KK Sir,

Thanks you for your help, I am the last one leave the class last Friday.

The DAC is much better than I expected when I tested at my home.

Lastly please don't forget me in the coming CD lesson too

Freddy

Dear KK Sir,

Thank you very much!

You are a nice teacher that I meet. If there is no classmate having the same situation like me, I can assemble at home and be arranged the testing and measuring at the other lesson you teach such as the coming CD lesson. Tonight I call you.

Once again thank you your teaching and work hard over several night for the class.

明

Call me tonight for one on one session.

To be fair to other classmate, only apply ONE time 1 on 1 to you.

Hope you can finish at ONCE time.

KK

Dear KK Sir,

I'am sorry that I cannot attend the class of this Friday. Do you have another day for the class.

Thanks.

明

Liky - 403X328X86

Hi William sir;

I want know the High-End DAC Big機箱, inside size....
???MM X ???MM
Thankyou!^=^

Did any cable disconnect inside? please take a look for me or bring it at this Fri.

k k sir
我部dac 開了工二小時後,發脾氣罷唱.點好呢?

NO, full power opeate at Fri and Sat la.

Need to recharge the power la.

KK

明天(星期日，16/3)會開嗎?