DAC 2496 (AK4393) DAC KIT With CS8416+AK4393+5532 - Page 156 - diyAudio
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Old 9th April 2012, 11:16 PM   #1551
VT67 is offline VT67  Belgium
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Didn't knew you where fidling around with a shunt psu for this DAC?
What's a My_Evo?

I'm still waiting for everything to arrive (DAC, transformer, case, modding parts)

Regards
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Old 9th April 2012, 11:24 PM   #1552
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Quote:
Originally Posted by VT67 View Post
Didn't knew you where fidling around with a shunt psu for this DAC?
I've yet to try it:

Click the image to open in full size.

It gave me great results with the FE and it's much simpler (and cheaper) than a Salas shunt that, BTW, it's probably overkill for an opamp.

Quote:
Originally Posted by VT67 View Post
What's a My_Evo?
It's Mauro Penasa's successor of the My_Ref but unlike the latter it's not a public design.

Basically it's a My_Ref with double current pump, DC-servo and a different compensation scheme.
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Old 10th April 2012, 01:04 AM   #1553
F1 FAN is offline F1 FAN  Canada
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Quote:
Originally Posted by billo44 View Post
I seem to have a dead DAC on my hands....
Power, 96k, error lights come on, 96K goes off when SPDIF is plugged in, error light flickers when the CD is spooling up and goes out when the CD plays.
just no sounds...
Transformer voltages are OK.
I swapped the op-amp for the original, it being the only thing which is socketed, but same results as expected.


Bill
Are your 3.3 and 5volt regs OK?
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Old 10th April 2012, 01:45 AM   #1554
F1 FAN is offline F1 FAN  Canada
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Oh and you might double check your solder joints on the 10nf cap in series with the SPDIF input to the CS8416.
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Old 10th April 2012, 02:29 AM   #1555
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Quote:
Originally Posted by ClaveFremen View Post
It's Mauro Penasa's successor of the My_Ref but unlike the latter it's not a public design.

Basically it's a My_Ref with double current pump, DC-servo and a different compensation scheme.
looks interesting, dario.. how can we make the +9V version?
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Old 10th April 2012, 04:12 AM   #1556
billo44 is offline billo44  United Kingdom
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Quote:
Originally Posted by ClaveFremen View Post
Hi Bill,

is the 15-0-15 wired correctly?

It seems wrong...

Can you post bigger pics?
Here are bigger pics including the legend on the Transformer.

I wired the transformer into a 'chocolate block' connector on the bench first and confirmed the voltages, but I'll be happy enough if I made a silly mistake with the wiring and the thing still works afterwards...
The blue black and green black pairs were tied up when the transformer arived.
I wired the both two blacks (from the blue black pairs) into the 0 of the 15-0-15 connection... I think

I appreciate the help, thanks.
Bill
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File Type: jpg TX legend.jpg (42.2 KB, 668 views)
File Type: jpg ACV 15-0-15. 9-0.jpg (102.2 KB, 654 views)
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Old 10th April 2012, 06:00 AM   #1557
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Quote:
Originally Posted by billo44 View Post
Here are bigger pics including the legend on the Transformer.

I wired the transformer into a 'chocolate block' connector on the bench first and confirmed the voltages, but I'll be happy enough if I made a silly mistake with the wiring and the thing still works afterwards...
The blue black and green black pairs were tied up when the transformer arived.
I wired the both two blacks (from the blue black pairs) into the 0 of the 15-0-15 connection... I think

I appreciate the help, thanks.
Bill
I think the connection should be blue (15) - black and blue (0) - black (15)
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Old 10th April 2012, 06:46 AM   #1558
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Originally Posted by TjiptoHendrawan View Post
I think the connection should be blue (15) - black and blue (0) - black (15)
I second that, actually it wont really matter about the color, you need to test the wires with a meter to be sure that the 2 wires u tie together for 0 dont have continuity

Last edited by apoopoo999; 10th April 2012 at 06:51 AM.
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Old 10th April 2012, 07:16 AM   #1559
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Quote:
Originally Posted by ClaveFremen View Post
I've yet to try it:

It gave me great results with the FE and it's much simpler (and cheaper) than a Salas shunt that, BTW, it's probably overkill for an opamp.
cheers Dario!

indeed it's much simplier, though have you done any face to face comparison with Salas? Also why do you think it would be an overkill for opamp?
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Old 10th April 2012, 07:24 AM   #1560
billo44 is offline billo44  United Kingdom
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Quote:
Originally Posted by TjiptoHendrawan View Post
I think the connection should be blue (15) - black and blue (0) - black (15)
Quote:
Originally Posted by apoopoo999 View Post
I second that, actually it wont really matter about the color, you need to test the wires with a meter to be sure that the 2 wires u tie together for 0 dont have continuity
Thanks folks I'll check that out later.
Hope I haven't fried anything!


Bill
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