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Problems With my BII - Clicks and distortion on the output.
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guglielmope  
#1 Posted : Saturday, February 2, 2013 5:17:17 PM(UTC)
guglielmope

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Italy
Location: udine
Hello
I've a buoght a Buffalo II with 100Mhz without any modification and Placid PSU.
It's second hand but I soldered the connectors and used it for the first time.
I've the same problem with S/Pidif and I2S: 44Khz about ok(very little distortion like saturation), 96Khz some distortion and clicks, 192Khz a lot of noise and distortion.
The leds of AVC don't light every time the same.
I use as transport an SD Trans 192 Ver.3.0
I've also a ES9023 I2S dac and it works perfect.
Do you have any suggestion?
Thanks a lot
Guglielmo
Italy
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LeonvB  
#2 Posted : Saturday, February 2, 2013 10:22:35 PM(UTC)
LeonvB

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Have you checked the shunt current of the Placid?
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guglielmope  
#3 Posted : Saturday, February 2, 2013 10:56:37 PM(UTC)
guglielmope

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Italy
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I checked when I built it, but tomorroy I'll verify the current again.
Thanks
Guglielmo
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guglielmope  
#4 Posted : Sunday, February 3, 2013 10:39:47 PM(UTC)
guglielmope

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Italy
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Hello,
I measured 260mA and not 350mA as indicated in the manual of the Placid.
Now is too late, but tomorrow I'll trim at 350mA. And I'll made nw tests.
Thanks a lot for the moment.
Ciao Gugleimo
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guglielmope  
#5 Posted : Monday, February 4, 2013 10:27:08 PM(UTC)
guglielmope

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Italy
Location: udine
Hello,
With 350mA everything seems OK.
Thanks a lot for your help.
Now I've only to verify the groud connection to eleminate a bit of hum.
There is any circuit drawing on the net?
For the moment I'm using the the board dirctely as voltage output.
Grazie
Guglielmo
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LeonvB  
#6 Posted : Tuesday, February 5, 2013 6:05:15 PM(UTC)
LeonvB

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There is a circuit diagram of the Placid, but not for the BII.
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Russ White  
#7 Posted : Tuesday, February 5, 2013 8:01:15 PM(UTC)
Russ White

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Any hum would be cause from something external to both modules. :)

It would be a wiring/routing issue.
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