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Old 6th September 2012, 04:33 PM   #1771
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Quote:
Originally Posted by cersepn View Post
Where's everyone getting their 4700 uF/63 Panasonic FC and Nichicon Muse from? Having trouble trying to get those values. Can only find FC in 4700 uF/25V
Better put 10 caps in paralel 470uF Pana FM
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Old 6th September 2012, 04:37 PM   #1772
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Quote:
Originally Posted by cersepn View Post
Where's everyone getting their 4700 uF/63 Panasonic FC and Nichicon Muse from? Having trouble trying to get those values. Can only find FC in 4700 uF/25V
Well, in case you really do need 63v one's, here is the one's I am using in BIB feeding Salas Simple RIAA pre.

ECO-S1JA472CA Panasonic Electronic Components | Mouser
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Old 6th September 2012, 04:41 PM   #1773
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No worries, I do worse all the time. Its just a hobby.
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Old 7th September 2012, 01:22 AM   #1774
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Nichicon KG - known as "Gold Tone" - also, "Elna for Audio" type, similar sound to the "Starget" caps, not the same as Silmic or Cerafines.
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Old 8th September 2012, 08:52 AM   #1775
cersepn is offline cersepn  United States
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Quote:
Originally Posted by merlin el mago View Post
Better put 10 caps in paralel 470uF Pana FM
Real scary
Quote:
Originally Posted by Tea-Bag View Post
Well, in case you really do need 63v one's, here is the one's I am using in BIB feeding Salas Simple RIAA pre.

ECO-S1JA472CA Panasonic Electronic Components | Mouser
Thanks for sharing, Tea-Bag! I went with a 4700/25 in the end
Quote:
Originally Posted by Salas View Post
3. Use a diode in same orientation as the ''see text'' PCB area Leds. It will give you a voltage drop that will be self set, when with a resistor it will depend enough on Q303's Idss that energizes the Leds. Its either you use 1k trimmer and one red led, or 2 red leds and a diode for 5V. The diode position can alternatively be a ~220R for easier filtration by C301 but it may give you hassle trimming it is the deal. Its a small chance it will be grossly off target with a 220R though. Don't go after 5V dead on, go after you are in your client circuit's acceptable power voltage area.
I hope i got it right..
Click the image to open in full size.
Also, regarding the use of powercon connectors, I'm not too sure about the polarity. Is this correct?
NAC3MPB goes to +F +S 0 0 of regulator; and
Click the image to open in full size.
Click the image to open in full size.

Is it worthwhile to DIY a better usb cable? The current cables' wires look quite fragile and i don't know if it has any impact on power delivery.. How difficult it is to DIY a usb cable given that one end is a usb mini b, soldering seems to be quite a challenge?

Last edited by cersepn; 8th September 2012 at 08:55 AM.
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Old 8th September 2012, 12:36 PM   #1776
Salas is online now Salas  Greece
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No, reverse the diode. You put it in as a Zener now. Missing C301 also, but you know that.
About USB splicing, it does not look like a nice job. Bit of a bodge. Is there a way to isolate the USB power lines at the DAC PCB by cutting some vias and feed the power nodes from the reg there?
NAC3FCB is a 3 terminal AC power connector. You need 4 contacts of far lower rating. Those cheapo CB microphone ones with securing ring will do. Never turn on before the connector is fixed to load or dummy resistor terminated for any lone PSU testing, else the sense and force circuit will be non complete. Don't know at 5V, but higher there had been damages.
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Old 8th September 2012, 01:17 PM   #1777
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Quote:
Originally Posted by cersepn View Post
Real scary

Thanks for sharing, Tea-Bag! I went with a 4700/25 in the end

I hope i got it right..
Click the image to open in full size.
Also, regarding the use of powercon connectors, I'm not too sure about the polarity. Is this correct?
NAC3MPB goes to +F +S 0 0 of regulator; and
Click the image to open in full size.
Click the image to open in full size.

Is it worthwhile to DIY a better usb cable? The current cables' wires look quite fragile and i don't know if it has any impact on power delivery.. How difficult it is to DIY a usb cable given that one end is a usb mini b, soldering seems to be quite a challenge?
Not too difficult
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Old 8th September 2012, 01:24 PM   #1778
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Quote:
Originally Posted by jameshillj View Post
Nichicon KG - known as "Gold Tone" - also, "Elna for Audio" type, similar sound to the "Starget" caps, not the same as Silmic or Cerafines.
I like Nichicon KG Gold Tune & prefer vs Elna.
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Old 8th September 2012, 01:24 PM   #1779
cersepn is offline cersepn  United States
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Click the image to open in full size.
I have no experience cutting vias and afraid i'll botch it up Are there any other practical alternatives?

Regarding the 4 contacts CB microphone connector, is this fine?

Will a 12R 3W work for dummy load?
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Old 8th September 2012, 01:27 PM   #1780
Salas is online now Salas  Greece
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Emailing the guy who did the board can be of help for a sure guide of how to cut off the USB power and where to feed external power maybe?
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