Ciao Andrea,
from my experience with Aleph30 (2 built) I can suggest:
-Use the gnd area on the power supply pcb as star ground
-Bring there all gnd connections, including signal gnd
-Connect safety earth from IEC socket to case but not directly to GND. This will prevent earth loop if another appliance is connected to earth without loosening safety.
In case you can connect them with a resistor, a RC network or whatever you like.
I also strongly suggest the use of a separate rectifier bridge for each secondary winding. With your PCB it must be wired externally but I think it is worth it.
Ciao!
Andrea
from my experience with Aleph30 (2 built) I can suggest:
-Use the gnd area on the power supply pcb as star ground
-Bring there all gnd connections, including signal gnd
-Connect safety earth from IEC socket to case but not directly to GND. This will prevent earth loop if another appliance is connected to earth without loosening safety.
In case you can connect them with a resistor, a RC network or whatever you like.
I also strongly suggest the use of a separate rectifier bridge for each secondary winding. With your PCB it must be wired externally but I think it is worth it.
Ciao!
Andrea
News:
I've modify the layout (sorry but attach file don't working) and now the problem is resolved
Thank you all for helping!!
Last thing........very strange
If I link both RCA, ONLY in speaker right feel a slight hum.....if I reverse the link, the hum exit from left speaker.
I suppose that the problem is not the Aleph......right?
I've modify the layout (sorry but attach file don't working) and now the problem is resolved
Thank you all for helping!!
Last thing........very strange
If I link both RCA, ONLY in speaker right feel a slight hum.....if I reverse the link, the hum exit from left speaker.
I suppose that the problem is not the Aleph......right?
Peppe said:BOZ because of simplicity (IMHO good starts for newbie)
B1 because (with your speaker) the gain you need is enough
P1.7 because of balanced in/out
Any other you like...
It is up to you
Peppe
Mmmm i think P1.7 is the best choice because I want to connect through balanced out pre with final.
there are no tube pre made by pass?
know where i find the PCB for P1.7?........Mmmmm KK-PCB or where?
I Attach the mass layout that i used
Attachments
You don't have to connect safety earth and signal gnd with a short, start with a low value resistor (10 Ohm or so) and report what happens.
Do you have other earthed appliances in the audio chain ?
Ciao
Andrea
Btw my suggestion included to wire the input socket gnd direct to the power supply pcb.
Do you have other earthed appliances in the audio chain ?
Ciao
Andrea
Btw my suggestion included to wire the input socket gnd direct to the power supply pcb.
Ciao,
since you already have the CD earthed you can connect the gnd of the amp with a resistor (at least 1W) or with a RC network.
Connecting the gnd of input sockets (I hope these are isolated from the chassis!) to the main board won't do any harm if almost no current flows into the connection between main board and star ground.
Hint: where do you connect the speaker return?
Ciao!
Andrea
since you already have the CD earthed you can connect the gnd of the amp with a resistor (at least 1W) or with a RC network.
Connecting the gnd of input sockets (I hope these are isolated from the chassis!) to the main board won't do any harm if almost no current flows into the connection between main board and star ground.
Hint: where do you connect the speaker return?
Ciao!
Andrea
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