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Old 2nd April 2010, 03:16 PM   #1
OliG is offline OliG  Canada
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Default F5 psu layout

Hello,

I'm building an F5 amplifier and I am going to try to etch my psu pcb. I just finished the layout and I would like to know if you can see anything wrong with this layout.

I followed the schematic from the owner manual of the F5. I wanted it on one layer as this will be my first try at etching. I know the connectors should be close to the edge, but putting X3 this way was easier... is it gonna be a problem other than aesthetic?

Please go easy on me... this is my first try with eagle.

Thanks !

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Old 2nd April 2010, 03:37 PM   #2
AndrewT is offline AndrewT  Scotland
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PSU PCB,
I can see how the common Zero Volts from the input side caps connects to the middle pin of the three way connector. Giving +ve, 0, -ve.
How does the Zero Volts of the output side caps connect to that pin?
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Old 2nd April 2010, 04:22 PM   #3
OliG is offline OliG  Canada
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Hi Andrew,

The output side caps are also connected to the center pin of the 3 way connector. I know the trace who gets there is small... could this be a problem?

Thanks !

Here is a closer look of the center connector, without the silk screen:

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Old 2nd April 2010, 07:15 PM   #4
AndrewT is offline AndrewT  Scotland
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OK, but remove the bits of ground trace that don't carry any current.
Then you might be able to improve trace widths particularly if the 3way is rotated 90degrees.
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Old 2nd April 2010, 10:05 PM   #5
OliG is offline OliG  Canada
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Thanks for this idea Andrew, rotating the 3 way surely improve traces. I also did change the resistors size as thoses I ordered are 15mm and I had first selected 12mm for the layout.

Anything else could improve it?

Thanks !

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Old 2nd April 2010, 10:52 PM   #6
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Default Yes!

Quote:
Originally Posted by OliG View Post
Thanks for this idea Andrew, rotating the 3 way surely improve traces. I also did change the resistors size as thoses I ordered are 15mm and I had first selected 12mm for the layout.

Anything else could improve it?

Thanks !

Click the image to open in full size.
Hi,

Why don't you use two bobble connection in the middle instead of one with three positions? That way you'll have more ground path in the middle instead of a narrow ground in the middle.

Just my two cents.

All the best,

Audiofanatic
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