HELP NEEDED...Noise from a 4 channel B1 buffer with Biino MK2 volume control...

Porfido · 09:47 PM

Hi everybody... First of all, please forgive my bad english...
I would ask advice about a nasty hum problem I have from a 4 channels B1 buffer with two Biino volume control boards I built...
I tried various wiring ways to improve but none worked...
The situation now is what (maybe) you can see from the weird drawing here...
Can you see something absolutely wrong that could cause gnd loops or something?
I used a gnd loop breaker between psu star ground and earth/chassis...
Thank you so much!

PS. The Biino is a relay attenuator you can see here:

Biino MK2 – hifi-electronics.de

Porfido · Today, 11:45 AM

Should I maybe try disconnecting psu star from signal?

epicyclic · Today, 11:47 AM

A photo would help .

Porfido · Today, 11:52 AM

Quote:

Originally Posted by epicyclic

A photo would help .

Thank you! Here some images before some modifications I made to wiring...

epicyclic · Today, 12:09 PM

Would you post a photo of the current setup taken from directly overhead . There are a lot of white wires to trace .

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Today, 11:45 AM	#2
Porfido diyAudio Member Join Date: Jun 2008	Should I maybe try disconnecting psu star from signal?

Today, 11:47 AM	#3
epicyclic diyAudio Member Join Date: Jan 2012	A photo would help .

Today, 12:09 PM	#5
epicyclic diyAudio Member Join Date: Jan 2012	Would you post a photo of the current setup taken from directly overhead . There are a lot of white wires to trace .