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Old 22nd May 2009, 09:07 PM   #531
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Default Grounding

Hi

Things aren't sounding quite right. Probably due to an incorrect filter cap being sent to me (giving cutoff 1693kHz). But I also have other confusions and would be grateful for advice;

1 - Should any other part of the DAC or power supply be connected to ground (apart from the RCA shield & output tranny, as shown in legarem's post #418)?

2 - I have connected three leads from the toridal tranformer - the two 8V and the 0V (between the two 15V inputs), but not the two 15v connectors. Is that correct?


Thanks
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Old 22nd May 2009, 09:35 PM   #532
piero7 is offline piero7  Italy
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Looks very very vintage your dac Franz!
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Old 23rd May 2009, 12:20 AM   #533
legarem is offline legarem  Canada
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Default Re: Grounding

Quote:
Originally posted by hoverdonkey
Hi

Things aren't sounding quite right. Probably due to an incorrect filter cap being sent to me (giving cutoff 1693kHz). But I also have other confusions and would be grateful for advice;

1 - Should any other part of the DAC or power supply be connected to ground (apart from the RCA shield & output tranny, as shown in legarem's post #418)?

2 - I have connected three leads from the toridal tranformer - the two 8V and the 0V (between the two 15V inputs), but not the two 15v connectors. Is that correct?


Thanks
When using output transformers you don't have to supply 15-0-15 vac on the 3 screws analog supply.

I use the center screw on analog supply (which is a ground) to go to the IEC ground of the 3 prong plug

You just have to supply 8 to 9 volts vac to the digital supply so take the two leads of a 8-9 vac transformer and feed the digital supply which has only 2 screws.
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Old 23rd May 2009, 04:34 AM   #534
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Can anyone post his experience with the Edcors?
I want to purchase the 600:600 ohm XSM and would like to know if it is big enough for this application.

Thanks
Ronenash
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Old 23rd May 2009, 09:57 AM   #535
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A small trick that can be done with both the 4398 and 8416, is shifting the RST terminal to always high. In that case the chips will not power down when no signal is present.
After some hours and in some cases a few days, the devices will enter a more stable thermal and electrical condition, and really start to perform at top notch.
In most cases RST is held Lo, because otherwise you will get white noise in your speakers if you cut the power to your transport or PC. So white noise when not locked is the price you pay for better performance
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Old 23rd May 2009, 06:02 PM   #536
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which will work better with this dac

1) http://www.edcorusa.com/Products/Sho...ct.aspx?ID=327

2) http://www.edcorusa.com/Products/Sho...ct.aspx?ID=332
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Old 23rd May 2009, 07:46 PM   #537
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You want #1, man, those are cheap. Let us know how it turns out.

Bill
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Old 24th May 2009, 07:51 AM   #538
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Bill Fuss

why 600 ohm Is better load for cs4397
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Old 24th May 2009, 10:06 AM   #539
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Hi,
I can't tell you that truthfully, but every transformer manufacturer I contacted recommended a 600/600 transformer for CS43xx chips. It's probably easier to wind a high fidelity 600/600 than a 10k/10k. Maybe you could buy both and then you could tell us what you think.

Bill
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Old 24th May 2009, 02:50 PM   #540
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Default Anybody used a tune output on this DAC

Hi All.
First off what a great thread, read it all and the Lampizator site also, took about day and half but got through it with just a mild headache.
My question are:
1, Has anyone tried using the Lampizator tube mod or similar as apposed to the Output transformer with this DAC that can compare both sonically ? and also ease of implementation for us not so Electronically minded.
2, So am I correct to assume that the board does indeed support up- sampling to 192KHZ as long as you select the proper switch based on source capability. and if so has someone worked out a way to attach some form of external selector button/switch as apposed to opening the assembled unit every time you are using a different source with different capability i.e CD/XBOX360/SACD/DVD-a player.
3, Is it possible to attach a optical out, reason if you have universal DVD player and you wish to use the the DVD 5.1 channels the external DAC can just pass the signal along to the receiver similar to what the DACMAGIC does.

Is there also any Aussies out on the forum that can assist me on any of the parts mentioned that can be sourced locally in Australia with the exception of the DAC of course.
Thanks very much in advanced.
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