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Russ White  
#41 Posted : Wednesday, July 18, 2012 12:31:49 AM(UTC)
Russ White

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Try temporarily connecting the inputs of the IVY-III to GND. Leave the DAC off.

If you power the IVY-III alone do you still get the Buzz?
JGlacken  
#42 Posted : Wednesday, July 18, 2012 12:51:17 AM(UTC)
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I am afraid I don't understand what you are asking. Where are the inputs on the Ivy 3 and how do I tie them to ground?
Russ White  
#43 Posted : Wednesday, July 18, 2012 2:07:11 AM(UTC)
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They are the headers that attach to the DAC. Labeled + G - connect + and - to G.
JGlacken  
#44 Posted : Wednesday, July 18, 2012 4:31:53 PM(UTC)
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OK, I have hooked up the Ivy 3 by itself and I get little to no hum in either speaker. Probably from my tube amps.

I now have much interference in both channels with now about half music although the left channel is going in and out. I have resoldered again the
dac board etc and still the same. Have taken out the sidecar and hooked up to the spdif 4 directly and I get the same noise and partial music.
JGlacken  
#45 Posted : Thursday, July 19, 2012 12:24:03 AM(UTC)
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What now?
Russ White  
#46 Posted : Friday, July 20, 2012 12:24:58 AM(UTC)
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I am starting to think the problem is likely interaction with your amp.
JGlacken  
#47 Posted : Friday, July 20, 2012 2:57:13 AM(UTC)
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I have Genesis M60 tube mono blocks.
JGlacken  
#48 Posted : Friday, July 20, 2012 1:42:45 PM(UTC)
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It is not the amps. I switched in a solid state Parasound and the same problems exist.

Jeff
avr300  
#49 Posted : Friday, July 20, 2012 6:34:14 PM(UTC)
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How about trying to go all the way back - to before post #1, where you had the system running without the hum.

Take the boards out of the box and see if you can get them to run silently.
JGlacken  
#50 Posted : Friday, July 20, 2012 7:00:43 PM(UTC)
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They are now running silently, but now the problem is the output is full of distortion and each channel goes in and out and the volume is very faint.
avr300  
#51 Posted : Saturday, July 21, 2012 10:02:18 AM(UTC)
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Sounds to me like a short.

You have to go over your soldering again. Carefully check for solder bridges.
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