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HQ-IV tube output balance DAC

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#64
You are not telling me that I think faster than a chinese designer are you ? 😀

I have some more suggestions but I think I better suggest them by PM. Please correct the spelling error in the thread title too. "HQ-IV tube output stage for balanced DAC chips" or the like.
 
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#65
jean-paul said:
You are not telling me that I think faster than a chinese designer are you ? 😀

I have some more suggestions but I think I better suggest them by PM. Please correct the spelling error in the thread title too. "HQ-IV tube output stage for balanced DAC chips" or the like.
Click to expand...


no, no! I not make PCB fast, im alway make many time for design one PCB.

Im not China . Im in Hanoi Vietnam

PM; what the name in English is not wrong ?
thanks again

hi hi!
 
#66
Excuse me for that I took the flag for a chinese one. Check your PM. Private Mail that is.

"HQ-IV tube banlance DAC" is not correct. It is not "banlance" and it is not a DAC. "HQ-IV tube output stage for balanced DAC chips" covers the item more precise.
 
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#70
I guess you guys are aware of the fact that this looks like a copy of Broskie's Unbalancer ?

Not aure about the copyright topic etc., but I wpuld found it fair to ask him for permission.

Anyhow, google the unbalancer and you will find that you should include potentially a second coupling cap, so that the diff pair is completely decoupled from the cf.
 
#71
Hi Blitz!

Thank you for showing me,

Yes, I was confused schematic, very sorry for you!

And this is my circuit diagram!
 

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#73
quanghao said:
1. adeveza :1PCB
2. apnneto :1PCB
3. goldkenn: 3 PCB
4. AR2: 2 PCB
5. Brooksl2: 1PCB
6. mvictor69: 1PCB
7. jonwhitear: 1PCB
8. rredline : 1PCB
9. aradan 2x sets of dac and psu
10. vasillis 2x dac+ psu
11. Ardahan: 1 PCB
12. frankwilker: 1 PCB
13. goldkenn : 3 PCB
14. passive420: 1 PCB
15. mvictor69 :1 PCB

thanks
Click to expand...

6. mvictor 2 x sets PCB + PSU
15 is included in nr 6!
Thanks
 
#74
Hi quanghao,

I am confused by the update.

At post #47 and #48, the No.Shunt HV supply seems now separated with the HQ-IV tube board, not all in one as the first post.

I have signed up for 3 PCBs,I am sure I must have the No.Shunt HV supply, do I need to change my order to 3 PCBs + 3 No.Shunt HV supply, or the current status "3 PCBs" will be fine?
 
#77
Information on prices and payment PCB

A. HQ-IV tube output stage for balanced DAC chips
Sizes: 160 mm X 180 mm
Material: double layer glass phip 2mm thickness
Surface plating: gold standard
The PCB is available for $35USD

B. No.shunt HV Regulator + Heater supply
The PCB is available for $20USD
Sizes: 95 mm X 185 mm
Material: double layer glass phip 2mm thickness
Surface plating: gold standard
The PCB is available for $20 USD
The shipping costs is 15USD ( for all with 1- 3 PCB )
C. Total: A+B+ship = 70
The payment you help me please:
Accepting USD PayPal only: quanghao168@yahoo.com.vn
 

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