Need opinion

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Hi All,

Here is PCB that I will use for Aleph 30

My questions are

1. PCB trace is about 5 mm is that ok?
2. Input and out voltage is close, is that ok? ussually I seen Input voltage on one side and the out put is on the other side

let me know please....
 

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godfrey said:
Thicken the V+ and D+ tracks and fill in the whole center area between GND and D-.
You just have to be careful that ground currents from charging pulses don't end up in the wrong place. Leaving the ground trace as a line rather than an area maintains the clear distinction between PSU input from rectifier (dirty) and PSU output (clean). Then the clean end can go to the signal ground without injecting buzz.
 
You just have to be careful that ground currents from charging pulses don't end up in the wrong place. Leaving the ground trace as a line rather than an area maintains the clear distinction between PSU input from rectifier (dirty) and PSU output (clean). Then the clean end can go to the signal ground without injecting buzz.
I got what you are saying

Maybe this one is better?
 

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tony Ma said:
Maybe this one is better?
No different. I didn't mean 'straight line', just a line as you originally had. The idea is simply to maintain the difference between PSU input (from rectifier) and output (to circuit). It doesn't matter if these are physically close to each other as long as the currents are forced to go where you want them to. You could just do a maximum copper layout with a cut along the middle to separate the in and out currents.
 
post12.
the lower version has a loop area that emits emf when the current varies.
The upper version has a lloop area in the lower half and that emits emf when the current changes. The upper half also has loop area that emits emf when the current changes.
BUT, !!!!!!!!!
the two loops are out of phase. The lower loop area cancels the upper loop area, leaving just the end area and the input/output terminals to have loop area to cause interference.
 
No different. I didn't mean 'straight line', just a line as you originally had. The idea is simply to maintain the difference between PSU input (from rectifier) and output (to circuit). It doesn't matter if these are physically close to each other as long as the currents are forced to go where you want them to. You could just do a maximum copper layout with a cut along the middle to separate the in and out currents.

Noted, now I learned some thing new again tks.....
 
post12.
the lower version has a loop area that emits emf when the current varies.
The upper version has a lloop area in the lower half and that emits emf when the current changes. The upper half also has loop area that emits emf when the current changes.
BUT, !!!!!!!!!
the two loops are out of phase. The lower loop area cancels the upper loop area, leaving just the end area and the input/output terminals to have loop area to cause interference.

So what you are suggesting?
 
the two loops are out of phase. The lower loop area cancels the upper loop area, leaving just the end area and the input/output terminals to have loop area to cause interference.
Disagree. The current in the two loops is different, so the EMI won't cancel.

@tony Ma:
6L6 raised a worrying point - are you sure this is the right sort of PSU for the Aleph? Also, I don't know what value resistors to recommend as I don't know anything about the Aleph.
 
Re:
The lower loop area cancels the upper loop area...
One could do something like this, but I don't know if it's worth it. Cancellation will only be good at a distance large compared to the distance between the loops. The ideal solution would be to use double-sided PCB and have the forward and return current paths directly above and below each other.
 

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Re:

One could do something like this, but I don't know if it's worth it. Cancellation will only be good at a distance large compared to the distance between the loops. The ideal solution would be to use double-sided PCB and have the forward and return current paths directly above and below each other.

I am a newbee.... and I am planning to make my own PCB seems it is hard to make 2 layers PCB

Yes there should be bipolar PS. I am thinking to make separate

here is the complete sets.
 

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  • Aleph 30 PSU PCB.jpg
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I am a newbee.... and I am planning to make my own PCB seems it is hard to make 2 layers PCB
No need for a 2 layers PCB. In fact the layouts you posted should work fine. The rest of us are just nit-picking. You ask for opinions - you get opinions.:p

Yes there should be bipolar PS. I am thinking to make separate

here is the complete sets.
OK that makes sense, and looks good. I like where you've connected ground (after the filtering).
 
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