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DAC-END R (ES9018) full assembled board

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#1,626
Little upgrade to shunt - my photo

Here the photo of my modifications on op2134 shunts.

Please remove the power supply jumps before apply this capacitors and check the voltage before reconnect the jumps.
 

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#1,628
Erlend Sæterdal said:
OPA 2134 wich are on alll positive shunt supplys. I do not need them because off my big caps on output.
Click to expand...

Normally a shunt regulator to be fast on variable load should work with low output capacitor.

In my experience very low capacitors can sound bad.

In any case I suggest you to start a little series of switch-on and switch-off tests without any modification to the DAC module and controller.
 
#1,629
Hi Quanghao,
I received the DAC in very good condition & very quick delivery (3 days international shipping is magic). Many thanks for your kindness to include the connectors.

But you forgot to send the transformer. Could you please send it ? It's OK if I have to send you additional shipping cost. Pls check your PM for the order message I sent you some months ago.
 
#1,630
i2k92 said:
Hi Quanghao,
I received the DAC in very good condition & very quick delivery (3 days international shipping is magic). Many thanks for your kindness to include the connectors.

But you forgot to send the transformer. Could you please send it ? It's OK if I have to send you additional shipping cost. Pls check your PM for the order message I sent you some months ago.
Click to expand...

yes, yes, i will sent you , im sorry i Wrong it!
thanks
 
#1,631
audiodesign said:
Normally a shunt regulator to be fast on variable load should work with low output capacitor.

In my experience very low capacitors can sound bad.

In any case I suggest you to start a little series of switch-on and switch-off tests without any modification to the DAC module and controller.
Click to expand...

In any case something is wrong with the LCD and controller. Did not work from first connection to the 3,3 v.
 
#1,632
I write here in the hope that Quanghao will respond to my numerous messages.
I bought from him 2 sets PCB ($ 100) THQ amplifier.
He later said that this amplifier scheme is not the most successful.
Several people have asked about the new changes in VAS but he apologized only because PCBs were wrong : #2319

http://www.diyaudio.com/forums/solid-state/174468-very-best-amplifier-i-have-ever-heard-52.html

It does not seem fair to pay something that is not ok.
And do not reply to posts.
 
#1,635
vitalica said:
I write here in the hope that Quanghao will respond to my numerous messages.
I bought from him 2 sets PCB ($ 100) THQ amplifier.
He later said that this amplifier scheme is not the most successful.
Several people have asked about the new changes in VAS but he apologized only because PCBs were wrong : #2319

http://www.diyaudio.com/forums/solid-state/174468-very-best-amplifier-i-have-ever-heard-52.html

It does not seem fair to pay something that is not ok.
And do not reply to posts.
Click to expand...

Could you send me all info by email about this because probably I can help you also if I don't know this project.

Send me info to both email:
ciuffoly@gmail.com
webmaster@audiodesignguide.com
 
#1,636
Hi Audiodesign,
have another problem with usb amanero, sound is very distort.
I have carefully followed the procedure on your site, the amanero reprogrammed several times, but the signal is always the same, when it plays sounds lcd displays various numbers and at the end of the sounds the correct frequency.
some suggestions. 😕

thanks advance.
 
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