XO powersupply PCB board diagram - diyAudio
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Old 21st February 2004, 03:51 AM   #1
LeoJar is offline LeoJar  Canada
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Talking XO powersupply PCB board diagram

Here are the PCB board image of 317/431 power supply for XO. The images is ready for direct printout without the need of resizing. (The size of this board is 2.324 inches in length)

This board had not included the transformer, diode and first filter cap (470uf).


I made the supply and the result is good. And would share this to those interest.
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Old 21st February 2004, 05:49 AM   #2
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If you could post the schematics it would be easier to review, also the pbc traces.
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Old 21st February 2004, 11:15 AM   #3
LeoJar is offline LeoJar  Canada
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Sorry. attached the wrong link...
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Old 21st February 2004, 11:18 AM   #4
LeoJar is offline LeoJar  Canada
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Please note that the image here is top view and so if you use this please reverse the image....
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Old 21st February 2004, 11:55 AM   #5
LeoJar is offline LeoJar  Canada
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Here is the schematics.

two errors in the layout. 1mH = ferrite; 20K =40 in clock output
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Old 21st February 2004, 12:12 PM   #6
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Lightbulb Another Error

Quote:
Originally posted by LeoJar
Here is the schematics.

two errors in the layout. 1mH = ferrite; 20K =40 in clock output
Hi LeoJar,
You missed the resistor between the collector and base of the transistor in the schematic. Something like 2k7 will do.
Seems like it is in the layout as 3k??.
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Old 21st February 2004, 02:15 PM   #7
LeoJar is offline LeoJar  Canada
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Elso,
Yes you are right. I am using 3K as shown on the layout diagram.
thanks,
Leo
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Old 24th February 2004, 09:48 AM   #8
pedro is offline pedro  Spain
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Default another schematics and board for XO

LeoJar,
Some month ago, Fmax started a thread "More on clock power supply" More on Clock Power Supply
There he shows a way to reduce the power supply noise to a Tent XO module usind a TL1763 LDO.
I made a board of it using his spec. and comments.
I have been using from then. But now I'm thinking on changing the design of this little board.
I attach the schematics and the board in order to get some comments from all of you.
Could you, please, say something about?
This is the schematics and pcboard
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File Type: gif xo sypply sch.gif (3.2 KB, 2031 views)
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Old 24th February 2004, 09:50 AM   #9
pedro is offline pedro  Spain
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Default the board

Sorry,
This is the pcb
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File Type: gif xo supply comp.gif (5.7 KB, 1837 views)
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Old 24th February 2004, 09:58 AM   #10
pedro is offline pedro  Spain
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Default trafo for the supply

You can use it to supply an XO module using a pair of 9V bateries or an external transformer.
Actually I'm using one of the +8V connections inside my CD player.
But I thinking to built a board for a trafo to supply, something like the ones you can see in the second page of the thread mentioned above: More on Clock Power Supply

Guido's supply use a choke and some more filtering that the one from LCaudio (which seems to use an small ferrite, the one at one side of the V in).
Can any of you give me some advice on what kind of choke should be better to use, where to set it and which values could I use?
Thanks a lot.
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