OLD THREAD DAC End by Andrea Ciuffoli

[vzs]

Originally Posted by apelizzo

First I'm gonna cross the two DACs. New DAC with old tube stage, and old DAC with new tube stage. This way I can identify where is the major issue.

@apelizzo
Did you try the changing you said between your new and old DAC?
Curious about the results...

[vzs]

Originally Posted by audiodesign

Zsolt,
I am agree with you about the possibility to eliminate the capacitors if we are using a digital input transformers also if the datasheet is not very clear.

About the ground, yes we can keep the input ground separated in the next dac board to use balanced digital input

The data-sheet is indeed not very clear. In order not to confuse others I would say that with this version, so using capacitors at input, the use of transformer is optional. As it offers galvanic separation it is good to use it.

[quanghao]

Now I have PCB
18 PCB Salas shunt for DAC
18 PCB DAC-end
18 PCB IV- stage for DAC
no have supply for IV ( you can use Salas shunt HV )
if you need it you can write please:

1. Strosek: full set
2. boudy : full set
3. ksnider1: full set
4. toufu : (IV + Supply For IV) x 2
5. ferrari: (IV + Supply For IV) x 3
6. analogdiy: full set
7. wobii: full set
8. Cobra2: (IV + Supply For IV) x 2
9. mikelm: full set
10. le´flu: just one salas reg

[dshambala]

Quanghao,

I received an extra set of boards from you. How do I get these back to you minus the shunt reg board? Much thanks.

shambala

[Ferrari]

1. Strosek: full set
2. boudy : full set
3. ksnider1: full set
4. toufu : (IV + Supply For IV) x 2
5. ferrari: (1x DAC-end) + (2x Salas shunt for DAC) + (3x IV)
6. analogdiy: full set
7. wobii: full set
8. Cobra2: (IV + Supply For IV) x 2
9. mikelm: full set
10. le´flu: just one salas reg

[boudy]

1. Strosek: full set
2. boudy : DAC-end x 1, Salas shunt for DAC x 1, IV- stage for DAC x 1, Salas shunt HV x 2
3. ksnider1: full set
4. toufu : (IV + Supply For IV) x 2
5. ferrari: (1x DAC-end) + (2x Salas shunt for DAC) + (3x IV)
6. analogdiy: full set
7. wobii: full set
8. Cobra2: (IV + Supply For IV) x 2
9. mikelm: full set
10. le´flu: just one salas reg

[Joshua_G]

1. Strosek: full set
2. boudy : full set
3. ksnider1: full set
4. toufu : (IV + Supply For IV) x 2
5. ferrari: (IV + Supply For IV) x 3
6. analogdiy: full set
7. wobii: full set
8. Cobra2: (IV + Supply For IV) x 2
9. mikelm: full set
10. le´flu: just one salas reg
11. Joshua_G: full set (1PCB DAC-end, 1 PCB IV- stage for DAC, 1 PCB Salas shunt for DAC).

As I understand, the prices are:
PCB- DAC END = $15
PCB- I/V stage = $15
PCB- Supply for I/V = $15
Shipping = $6
(so far $45)
Plus Payment by PayPal fee %3.5 = $46.575 .
Is that correct?
Shall it be $46.57 or $ 46.58?
(I had to browse back 112 pages to get to the prices)!

Payment made to: quanghao168@yahoo.com.vn .

[ksnider1]

Originally Posted by quanghao

Now I have PCB
18 PCB Salas shunt for DAC
18 PCB DAC-end
18 PCB IV- stage for DAC
no have supply for IV ( you can use Salas shunt HV )
if you need it you can write please:

1. Strosek: full set
2. boudy : full set
3. ksnider1: full set
4. toufu : (IV + Supply For IV) x 2
5. ferrari: (IV + Supply For IV) x 3
6. analogdiy: full set
7. wobii: full set
8. Cobra2: (IV + Supply For IV) x 2
9. mikelm: full set
10. le´flu: just one salas reg

Hi quanghao, I send you $60 via paypal for full set. I'm confused now. Do I get full set from you ? Is Salas shunt HV better for IV- stage. Please please clarify.

Thansk

[ims]

I want to update with my request:

1. Strosek: full set
2. boudy : full set
3. ksnider1: full set
4. toufu : (IV + Supply For IV) x 2
5. ferrari: (IV + Supply For IV) x 3
6. analogdiy: full set
7. wobii: full set
8. Cobra2: (IV + Supply For IV) x 2
9. mikelm: full set
10. le´flu: just one salas reg
11. Joshua_G: full set (1PCB DAC-end, 1 PCB IV- stage for DAC, 1 PCB Salas shunt for DAC).
12. ims: 2 x PCB-Supply for I/V salas reg

As I understand, the prices will be:
2 x PCB- Supply for I/V = 2 x $15
Shipping = $6
(so far $36)
Plus Payment by PayPal fee 3.5% = $37.26
Is that correct?

I will make a payment to: quanghao168@yahoo.com.vn
Is this your valid paypal account for now?

Thanks.

[agithegreat]

Ok i have another problem, on my I/V board.
I had C6 and C2 blow as I put them in the incorrect way around. Since replacing them I no longer get any voltage drop across R1-4 and R13-16.
What have i blown?

I should also say that i do not have the tube plugged in. However when i had voltage drop earlier, i didn't have them in them either. Was it because the cap was the incorrect way around that it allowed current flow and as such gave me a voltage drop???