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Quanghao Audio Design Quanghao Audio Design is a producer of DIY Audiophile Kits and PCB boards, selected from many listening tests!

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Old 29th June 2010, 06:43 AM   #11
sugden is offline sugden  Singapore
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Hi Quanghao,
May i know when you going to sent us the new update of DAC-end PCB? Can you create a BOM file (like the one you created HERE) for us to follow, it will make us much more easier to complete the project. You effort will be very much appreciated.

Best Regard
MartinTie
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Old 29th June 2010, 07:15 AM   #12
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Hi Sugden! this is the bom or DAC-end up updat, and you can se it in my web: kit ad1865


Parts List for kit DAC-END
Resistor Vishay/Dale CCF50 1/4W:
470 Ohm x 1 R39
75 Ohm x 1 R41
680Ohm x 1 R40
Resistor Caddoc MK132:
200 Ohm x 2 R37,R38
Capacitor Vishay/BC
0.1uF/12V x 6 C26,C28,C30,C32,C34,C36
0.01uF x 2 C38,C39 (at digital input), C40,C41
68nF/63V x 1 C37
Sanyo os-con - electrolytic capacitors:
47uF/10-16V x 6 C24,C27,C29,C31,C33,C35
Chip
CS8414 x 1 U3 Cirrus Logic Inc
74HC04 x 1 U2 Toshiba
AD1865 NK, NJ, N x 1 U1 Analog Devices
Socket : 28 pin, 24pin, 8pin
Inductor: 120uH x x 2 L1, L2
Led: GREEN LED x 1
SPDIF: Transformer x 1 T2 Newava Technology S22083 or LL1572

Salas Shunt on The DAC
JFet Toshiba
2SK170 x 18 Q2,Q3,Q5,Q8,Q9,Q11,Q14,Q15,Q17 Q20,Q21,Q23,Q26,Q27,Q29,Q32,Q33,Q35 Transistor
Transistor Fairchild Semiconductor
BC560 x 1 Q10
BC550 x 5 Q4,Q16,Q22,Q28,Q34
Mosfet
On Semiconductor International Rectifier (IR)
IRF540 x 2 Q7,Q12
IRF9540 x 10 Q1,Q13,Q19,Q25,Q31,Q6,Q18,Q24,Q30,Q36
Electrolytic Capacitors / Rubycon ZLH
220uf/16V x 6 C3,C7,C11,C15,C19,C23
2200uF-4700uF/25V x 6 C1,C5,C10,C13,C17,C21
Capacitor Illinois Cap & Wima, etc...
0.1uF/25V x 12 C2,C,C6,C10,C14,C18,C22,,C4,C8,C12,C16,C20,C24
Resistor Vishay / Dale CCF50 1/4W
10 Ohm x 6 R4,R11,R16,R22,R28,R34,
47 Ohm x 6 R5,R11,R17,R23,R29,R35
100 Ohm x 6 R3,RR9,R15,R21,R27,R33
220 Ohm x 12 R2,R8,R14,R20,R26,R32,R6,R12,R18,R24,R30,R36
Resistor Vishay / Dale CCF50 2W
33 Ohm / 2W x 6 R1,R7,R13,R19,R25,R31
Led Green Led x 18 L1-L18
Diode VISHAY 1N5819
2A/800V x 24 D1-D24
Trimmer Fairchild Semiconductor
VR 1K Ohm x 6 VR1-VR6
Tranformer
9-12 V/100-200mA x 6
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Old 29th June 2010, 07:18 AM   #13
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And the bom of iv satge use tub 6h30, 6h6, 6dj8:

IV stage for DAC-END
Composite-Triode
1. Resistor
R1,R31 = 22R/2W
R16 - R20A = 18K/2W
R32 - R36A = 18K/2W
R22,21,37,38 = 200R
R23,24,39,40 = 470K
R25,26,27,28 = 2K
R41,42,43,44 = 2K
R29,30,45,46 =220K
R52 = 10R

Resistor RELAY
ALL 1/4W
R47 = 220K
R48= 1K
R49 = 5.6K
R50,51 = 4.7K

2. Caps
C16, 22: 47uF/450V
C19, 21 ,24, 26 = 220uF/16V
C19,20,25,26 = 0.1uF
Caps -output:
C17, 23: 0.47 - 1uF/450V
Caps RELAY
C28: 47 - 220uF/12V
3. DS2Y RELAYS 5v X 1
4. Transitor
Q1: BC337
5. IC: LM311
6.Diot: D19, d20 = 1N4007 or better

7.Tube: V1, V2 = 6H30Pi, 6H6Pi, or 6dj8 x 2
8 . Tube Socket 9 PIN X 2
9. PCB I/v stage X 1
Note:
1. All resistor 1/4W or 1W
2. R1, R31: 22R/2W. R16 - R20A use 2W. R32 - R36A use 2W
2. The delay time : 0.45 minutes

Use Tube:
1.Tube 6H6PI:
+B = 270V. R22, R21, R37, R38 = 400R - 470R.
2.Tube 6H30PI:
+B = 230V. R22, R21, R37, R38 = 200 - 220R.
3.Tube 6DJ8 or 6H23:
+B = 200V. R22, R21, R37, R38 = 280R - 300R.
* R16 - R20A = 47K/2W .
* R32 - R36A = 47K/2W.

Parts List Salas Shunt for iV stage
JFet
2SK170 x 1 Q4
Transistor
2N2906 x 1 Q5
MJE 350x 1 Q2
MosFfet
IRF9160 x 1 Q1
IRF840 x 1 Q3,Q15
IC
LT1084, 85 Or LM 317 x 1 U1
Capacitor
220uf/450V x 2 C4,C5
1uf/450V x 2 C2,C3
100uF/25V x 1 C1
4700uF/16V x 2 C10,C11
470uF/16V x 2 C12,C14
47uF/16V x 1 C13
0.1uf/16V x 5
Resistor 1/2W
3.3 Ohm x 1 R7
47 Ohm x 2 R9,R10
200-220 Ohm x 1 R13,R2,R6
6.8K Ohm x 1 R14
Resistor 2W
33 Ohm x 1 R1
5.6 K Ohm x 1 R5
120 K Ohm x 1 R4
100 Ohm x 2 R15,R16
Resistor 5W
56K x 1 R3
Trimmer
2-5 K Ohm x 1 VR2
500-1K x 1 VR1
Led Green Led 3 D2,D3,D4
Diode
Diode 4A x 4 D13,D14,D15,D16
Diode 1N4007 x 2 D17,D18
Diode 2A/800V x 4 D9,D10,D11,D12
Diode Zenner
1n4172
TRANFORMER
SALAS SHUNT 1 0-200-250V/100mA
Filament x 1 0-8V or 0-9V/2A
Heatsink
10W x 2 Q1,Q3
5-10W x 1 U1
Jump
3 x 2
PCB
SSHV x 1 QUANGHAO
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Old 10th July 2010, 10:03 PM   #14
Ryssen is offline Ryssen  Sweden
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What ratio should a audiotransformer at the DAC output have,if I donīt wanna use the tube output?

Click the image to open in full size.
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Old 12th July 2010, 07:02 AM   #15
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Quote:
Originally Posted by Ryssen View Post
What ratio should a audiotransformer at the DAC output have,if I donīt wanna use the tube output?

Click the image to open in full size.
i don't understand what do you ưant?? can you show mean??
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Old 12th July 2010, 07:29 PM   #16
Ryssen is offline Ryssen  Sweden
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Ok, I donīt want to use the tube output,I want to use a transformer instead.
And the AD1865 is outputting 127mv on the audiooutput, if I want 2vRms does it mean the transformer should be 1:16 ?
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Old 13th July 2010, 12:03 AM   #17
tassosk is offline tassosk  Greece
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Sowter Transformer 9762 DAC INTERFACE* FOR AD1865N-J can give 22db gain with 200ohm, that is
if we use the formula db = 20Log10(Vout/Vin) and resolving for Vout, output should be around 2.52V if I'm not wrong.
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Old 21st July 2010, 02:36 AM   #18
phrarod is offline phrarod  United States
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What is Salas' opinion now for the Rubycon ZLH caps in the shunt supply? He was thinking not to have those any longer.

If he changed his mind where are you guys sourcing them.

On the rest of the BOM file parts are sourced from Digikey?
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Old 21st July 2010, 02:53 AM   #19
phrarod is offline phrarod  United States
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Default Input transformer?

I did some research and according to many digital designers and transformer builder they recommend the Digital Audio Transformer SC947-02 by Scientific Conversion. Wondering if anyone tried it?

Scientific Conversion, Inc. - Transformers and Inductors
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