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Old 6th November 2010, 04:15 PM   #1991
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Quote:
Originally Posted by COX77 View Post
It is a long time and j have never received my boards
Philippe
You not get the PCb DAC-end round 2??
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Old 6th November 2010, 04:46 PM   #1992
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Quote:
Originally Posted by Dear77 View Post
Hi Guys,
Ive a question- has it ever happened to any of you that one of the dac elements close to AD1865 gathered 50 Hz transformer noise that was audible in the speakers? i know that my transformer is too close to the pcbs but the guy i bought it from assured me its screened. When I put in optional chokes, its even a bigger nightmare- noise is audible at 9 oclock. Its less noisy when I put in a piece of steal between the transformer and pcb where the chokes and wires joining pcbs are. Thx for help
Oh! That is the transformer!
It is very near the chip and tube! Not good!
You can try take it go out the chassis, and test again!
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Old 7th November 2010, 03:54 PM   #1993
phrarod is offline phrarod  United States
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Quote:
Originally Posted by Strosek View Post
Quanghao... Here is one...

PLEASE NEW THREAD AND NEW BOM

It's very confusing having differrent projects all in one thread. Threads are free! It makes sense! Let's do it already!
So is this the right one? 1N5819RL STMicroelectronics Schottky (Diodes & Rectifiers)
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Old 23rd November 2010, 01:22 AM   #1994
toufu is offline toufu  United States
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i built the dac. i have 3 ad1865 chips, one gives one channel, the other 2, no sound. Can i assume the chips are bad?
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Old 24th November 2010, 06:09 AM   #1995
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Are you sure your DAC is working properly?
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Old 1st December 2010, 09:01 PM   #1996
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Default dacend almost done

Hi, here is my DAC-END almost done. I'm working on front panels to replace temporary plexiglas.
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Old 1st December 2010, 09:17 PM   #1997
adamus is offline adamus  United Kingdom
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nice - i see the salas hv shunt is in there too, it performs well indeed.
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Old 1st December 2010, 09:25 PM   #1998
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indeed, it's must. SSHV is big improvement over original IV power supply. Highly recommended for DAC-END.
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Old 2nd December 2010, 01:30 AM   #1999
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Quote:
Originally Posted by ksnider1 View Post
indeed, it's must. SSHV is big improvement over original IV power supply. Highly recommended for DAC-END.
you use 5687! so the SSHV need low current, R1 ( R set current) = 56R, it is ok!
An measure the voltage drop on R 56R, And V: 56 = mA ( toltal current)
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Old 20th March 2011, 05:20 PM   #2000
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I've had a problem

The DAC stopped working yesterday. I pulled it apart and the power supply for the DAC (the salas shunt). has gone a cropped on the digi supply.

The 2 resistors have got extremely hot. So hot they melted my poor solder join. So I resoldered them back together and it's working again.

However the resistors are very hot to the touch. Also the 3 dropper LED's are only illuminating occassioanlly. Sometimes they don't come on at all. Other times they come on for maybe 2 minutes, then they go out.

The other parts of the shunt are operating fine (the ana. side).

Any idea's anyone?
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