2008 7月-12月 第1項課程召集 - (1) 夏季 DAC 原理和製作班 (10月11日繼續組裝)

Dear sir,

I want to join and the DAC class with 套件3, please reserve a seat to me but I cannot download the application form from the posted link, can fax the application form to 25058203 please?

Thanks

Ronald

Dear KK sir,

Sorry to inform you that I've to cancel my booking because of some business matter, hope can join your class later.

Dear KK Sir,

I've rescheduled my business matter and can join in the class on Sept but do you still have a room for "套件2 : Analog Device AD1955 TRUE Balance output" ? I'm a bit late but please inform me if still have a room availalbe and I can make deposit immediately, sorry for any inconvenience caused.

Thanks

Dear KK Sir,

I've made the payment through Paypall today already, Receipt ID: 7M933252UT3014938

Thanks

Dear KK Sir,

Want to ask is there any upgrade options available and can be provided by hififever for 套件2 : AD1955 DAC,  e.g. upgrade capacitor to "Blackgate" or other component upgrade?

Thanks

KK sir,

I'm using Cambridge Audio 640C V2, can it support 11.2896MHz?


Sugargar

KK Sir,

As my 640C player not on the support list, you mean I need to mod my CD player? and install the USB device which you've shown us yesterday into the 1955 DAC? to achieve" 用S/PDIF来连接 >>  转盘与解码器的时钟就要一致，这样才能同步"?

If the answer is yes, that means I need to attaned the CDP mod class later or I better build a HTPC to achieve "转盘与解码器的时钟就要一致"?

Sugargar

KK Sir,

I'm building 1955 DAC and want to know the price of upgrading to Plan A with OPA797x4, OPA627x4,OPA2604x2, (4.7uf x 4pcs good capacitors around $500), USB module and without all other capacitors.

Thanks

KK Sir,

Please reserve one USB module to me 1st, waiting admin reply on special quote.  

I have a question about the voltage of cap on power filtering part in AD1955 which you have suggested on last night:
1) 4700-6800uf better use 35v+
2) 2200-4700uf better use 25v+
3) 2200uf better use 25v+

If I use blackgate STD cap on the above slot, the voltage of cap in blackgate STD cap stock list is only 16V, if I use the following STD cap on power filtering slot, 16V voltage enough?
1) 4700uf,16V x 2
2) 3300uf,16v x 3
3) 2200uf,16v x 1

In additon, if I use (Blackgate FK) 100uf,16V x 8 in the PCB slot, is 16V enough?

Need some advice


I want to join the (special class) at coming week (mon-Fri) nights, please let me know the exact date. In additon, I want to buy the digital meter $2xx which you shown us yesterday because my tiny meter seems not work, will pickup at the special class.

Thanks

Sugargar

KK Sir,

As many 1955 DAC students like me cannot design which upgrade plan is best for us, can you post or send the default parts list and upgrade Plan A & B?  so we can compare and make our desicion faster and easier.

Thanks

Sugargar

KK Sir,

I can join choice 1 or choice 2 class.

Sugargar

KK Sir,

I am AD1955 default 版本學員 but I really need the digital meter to check all the resister before soldering.  I want to buy 1 digital meter ($2xx) and 1 USB module from you, can U bring those thing on 10thSept night and I can pick up all default parts also? I will paid you money at that night ok?

Sugargar

KK Sir,

Thanks a lot

Sugargar

Dear KK Sir,

I've already soldered LM1117-3.3 & LM1117-5 into the PCB already, do I need to remove them before testing on 15/9? If don't remove those parts , can do the testing also?

"Major testing the voltage after first stage of discrete regulator. (8 group of discrete regulator), tunning the +/- 15V output to Analog power supply.
If everything OK, people should soldering back 9 piece of LM1117-5 and LM1117-3.3V LDO. And clean your PCB by supplied liquid."

Sugargar

KK Sir,

Removed them and ready to test, see all at Monday.

Sugargar

KK Sir,

Is the case with LCD display for 1955 Pro ready? Finished all soldering already.

Sugargar

KK sir,

Got some question on:

A) Upgrade hints:
4. Silver Wire of MCK, DATA, BCK, LRCK will be a good result.

Q: Is it good enough if I use the silver wire (pink colour) attached on the USB module which last time you tested on my PCB board?

B) Can I use back the USB module which you have assembled and tested on my PCB board last time? because I've used over 2 hours to solder the wire and tailor make the mounding.

C) After your recent test:
Playback:
I am usign WMP11, any MP3 song, it show 44.1KHz in the LCD panel of AD1955. No need to set in PC.

Q: Do you think the quality of the MP3 song playback by AD1955 pro better than market $2k sound card?

Sugargar

Woo.........., thx KK sir

Need to prepare how much $ ar?

Sugargar

KK Sir,

Can provide a "金 融 海 嘯" special promotional price for upgrading from crystal to TCXO in the USB module? [-o<

Many Thanks

Sugargar