Pure Tube i/V for ES9038PRO-9028, 9018, AKM...

[JPDuarte]

Hello QH, can you tell me if this is correct and if it is correct that means those resistors have to be mount on top of the surface components.

 

[JPDuarte]

murdorf 100+100+ mylitic cap

Hello guys, sorry I have a dumb question, how do you solder this cap, take a look at the picture.

 

[quanghao]

Hi JPDuarte!

please see it!

the best for advice
thanks

 

[quanghao]

Here a look to the boards with parts on it.

it is beautiful! thanks

 

[JPDuarte]

Hello QH, thanks for replay but in post #72 I asked about those resistors and you said not to used them because they are in parallel with R i/v , but in a recent post said need to use 100k resistor and in pure I/V right channel I have to change them from 47k to 100k, just a little confuse here, please advise. thanks

 

[quanghao]

Hello QH, thanks for replay but in post #72 I asked about those resistors and you said not to used them because they are in parallel with R i/v , but in a recent post said need to use 100k resistor and in pure I/V right channel I have to change them from 47k to 100k, just a little confuse here, please advise. thanks

Hi!
All the sample image 1 . You see good !

R I/V at all input . (27 ohm)
Thanks

 

[chi0001]

paid by paypal, please check.

received the transformer, thanks alot.
and the red pair cable is primary 220v input?

 

[quanghao]

received the transformer, thanks alot.
and the red pair cable is primary 220v input?

yes 220v input!

thanks

 

[quanghao]

Please note: Adjust the voltage properly design!

1. Use VR1 to adjust the voltage B = 240 V

2. Use VR2 to adjust the voltage at point A = 120 to 135V

I invite you to see pictures!
thank you!

quanghao

 

[quanghao]

Hi JPDuarte!

did you finis your DAC?? thank your advice!
quanghao

 

[JPDuarte]

Hello QH, thanks for asking, almost just waiting for two more transformer ( need 4 transformer to converted from 220 to 115). Is a challenge because chassis mod but I will finished it. I'm getting a wonderful help from Algar (Sylvain), he did the same to this Dac but he has a ton more experience in electronics than me, again thanks a lot to him. But I have more questions about some components, if you do not mind to ask you. Thanks

 

[Luke]

I assume this works fine with ES9018 dac chip and higher i/v resistor? What is the gain of the tube stage?

 

[quanghao]

Hi JPDuarte!

this coment for Pi 3 supply!

thanks

 

[JPDuarte]

Do you have a part number for C3 6800uf 12v ?

 

[JPDuarte]

Do you have something similar for d45h11 , this one is backorder.

 

[quanghao]

Do you have something similar for d45h11 , this one is backorder.

Hi!

1. the cap use from 4700 to 100uF /12 to 16V
2. d45h11, you can use D45H8

thanks

 

[JPDuarte]

Thanks QH, just had a 4700 uf 35v cap in my box and digikey sent me the d4511. I already installed them.

 

[quanghao]

Thanks QH, just had a 4700 uf 35v cap in my box and digikey sent me the d4511. I already installed them.

Good, please try to finis your Dac.
It is best sound!
Thanks

 

[JPDuarte]

I'm trying , checking voltages of all my transformer right now, and checking RPI3 power supply board and it is not working, I think no good soldering on that tiny lt3042.

 

[JPDuarte]

Hi QH, because I'm using this power supply I have to cut a trace on the amanero board and desolder a component, right?