AudioSector-chip amp kits, dacs, chassis - Page 154

rabbitz · 1st February 2007, 11:14 AM

A question on the DAC Peter. Is it normal to have a few volts of DC on the RCA output? This was only measured without any connections attached.

The reason I ask is, mine has always been set up as a single source and but now has a Elma for source switching. I'm getting popping during source changes only with the DAC...... all other sources clean. There's no problems with the sound as it's fantastic.

Peter Daniel · 1st February 2007, 01:54 PM

The original design did not have resistors to ground after output coupling caps. So if you measure offset without load connected, you will see some offset. As soon as the DAC connects to a next stage, the offset disappears. This may create some popping when switching sources (depending how the preamp source selection is configured).

I still don't supply those resistors with a kit, as the DAC sounds better without them, however, with a new boards, I made space for them, and if needed, they can be installed (R11/R12 in a picture, 50k or so value)

rabbitz · 1st February 2007, 02:31 PM

Many thanks for the info Peter.

wigginjs · 1st February 2007, 11:18 PM

This question seems ridiculous even to me, so I'm sorry in advance. I'm interested in a DIY DAC kit. Peter, it seems you have one available. Where are the details? I don't see any information on www.audiosector.com . Again, sorry if this is ridiculous.

Peter Daniel · 1st February 2007, 11:28 PM

The DAC is actually mentioned on my site, in May 2005 Latest News. I don't advertise it though, as such kit would be in direct competition with my commercial product, that has been recently reviewed here: http://www.6moons.com/audioreviews/a...e5/system.html

So, all marketing of the DAC kit is based on this thread and a word of mouth of happy customers.

wigginjs · 2nd February 2007, 12:05 AM

Peter:

Is it still possible to purchase a "regular" kit with both RCA and optical inputs? As I understand it this would include everything with the exception of the transformer?

This project is exactly what I'm looking for thanks very much for making it available to the DIY community. I read the review of your commercial products, very cool that you've been able to make the leap into producing your own commercial electronics. I'm sure thats very satisfying, good luck with it.

Peter Daniel · 2nd February 2007, 12:20 AM

Yes, the regular kit is also available. I can supply optical input as well, with a schematic how to connect it. All you would need is transformer (and toggle switch for input choosing)

wigginjs · 2nd February 2007, 12:28 AM

Whats the damage ($) with shipping to USA zip code 29201?

Peter Daniel · 2nd February 2007, 12:38 AM

The regular kit is $100, Toslink $10, shipping $11

wigginjs · 2nd February 2007, 12:52 AM

Cool, great pricing. This includes the DIP version of the DAC? No SMD soldering right? How do you accept payment?

Side questions:

* Has anyone modified this to use an external clock? As I understand it there is a way to "slave" a clocked device over S/PDIF by providing your own clock within the DAC?

* Did the USB interface for this ever become available? If so, how much extra? Can it be switched along w/ the RCA and TOSLINK?

1st February 2007, 11:14 AM	#1531
rabbitz diyAudio Member Join Date: Jul 2003 Location: Newcastle, Australia	A question on the DAC Peter. Is it normal to have a few volts of DC on the RCA output? This was only measured without any connections attached. The reason I ask is, mine has always been set up as a single source and but now has a Elma for source switching. I'm getting popping during source changes only with the DAC...... all other sources clean. There's no problems with the sound as it's fantastic. __________________ No longer DIY active

1st February 2007, 01:54 PM	#1532
Peter Daniel diyAudio Member Join Date: Jul 2002 Location: Toronto, Canada	The original design did not have resistors to ground after output coupling caps. So if you measure offset without load connected, you will see some offset. As soon as the DAC connects to a next stage, the offset disappears. This may create some popping when switching sources (depending how the preamp source selection is configured). I still don't supply those resistors with a kit, as the DAC sounds better without them, however, with a new boards, I made space for them, and if needed, they can be installed (R11/R12 in a picture, 50k or so value) __________________ www.audiosector.com “Do something really well. See how much time it takes. It might be a product, a work of art, who knows? Then give it away cheaply, just because you feel that it should not cost so much, even if it took a lot of time and expensive materials to make it.” - JC

1st February 2007, 11:18 PM	#1534
wigginjs diyAudio Member Join Date: Dec 2003 Location: Columbia, SC	This question seems ridiculous even to me, so I'm sorry in advance. I'm interested in a DIY DAC kit. Peter, it seems you have one available. Where are the details? I don't see any information on www.audiosector.com . Again, sorry if this is ridiculous. __________________ The Four Chairs DIY Home Theater

1st February 2007, 11:28 PM	#1535
Peter Daniel diyAudio Member Join Date: Jul 2002 Location: Toronto, Canada	The DAC is actually mentioned on my site, in May 2005 Latest News. I don't advertise it though, as such kit would be in direct competition with my commercial product, that has been recently reviewed here: http://www.6moons.com/audioreviews/a...e5/system.html So, all marketing of the DAC kit is based on this thread and a word of mouth of happy customers. __________________ www.audiosector.com “Do something really well. See how much time it takes. It might be a product, a work of art, who knows? Then give it away cheaply, just because you feel that it should not cost so much, even if it took a lot of time and expensive materials to make it.” - JC

2nd February 2007, 12:05 AM	#1536
wigginjs diyAudio Member Join Date: Dec 2003 Location: Columbia, SC	Peter: Is it still possible to purchase a "regular" kit with both RCA and optical inputs? As I understand it this would include everything with the exception of the transformer? This project is exactly what I'm looking for thanks very much for making it available to the DIY community. I read the review of your commercial products, very cool that you've been able to make the leap into producing your own commercial electronics. I'm sure thats very satisfying, good luck with it. __________________ The Four Chairs DIY Home Theater

1st February 2007, 02:31 PM	#1533
rabbitz diyAudio Member Join Date: Jul 2003 Location: Newcastle, Australia	Many thanks for the info Peter.

2nd February 2007, 12:20 AM	#1537
Peter Daniel diyAudio Member Join Date: Jul 2002 Location: Toronto, Canada	Yes, the regular kit is also available. I can supply optical input as well, with a schematic how to connect it. All you would need is transformer (and toggle switch for input choosing) __________________ www.audiosector.com “Do something really well. See how much time it takes. It might be a product, a work of art, who knows? Then give it away cheaply, just because you feel that it should not cost so much, even if it took a lot of time and expensive materials to make it.” - JC

2nd February 2007, 12:28 AM	#1538
wigginjs diyAudio Member Join Date: Dec 2003 Location: Columbia, SC	Whats the damage ($) with shipping to USA zip code 29201? __________________ The Four Chairs DIY Home Theater

2nd February 2007, 12:38 AM	#1539
Peter Daniel diyAudio Member Join Date: Jul 2002 Location: Toronto, Canada	The regular kit is $100, Toslink $10, shipping $11 __________________ www.audiosector.com “Do something really well. See how much time it takes. It might be a product, a work of art, who knows? Then give it away cheaply, just because you feel that it should not cost so much, even if it took a lot of time and expensive materials to make it.” - JC

2nd February 2007, 12:52 AM	#1540
wigginjs diyAudio Member Join Date: Dec 2003 Location: Columbia, SC	Cool, great pricing. This includes the DIP version of the DAC? No SMD soldering right? How do you accept payment? Side questions: * Has anyone modified this to use an external clock? As I understand it there is a way to "slave" a clocked device over S/PDIF by providing your own clock within the DAC? * Did the USB interface for this ever become available? If so, how much extra? Can it be switched along w/ the RCA and TOSLINK? __________________ The Four Chairs DIY Home Theater

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