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Old 8th January 2013, 03:30 AM   #121
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Quote:
Originally Posted by quanghao View Post
2. Very good individual components, industrial welding machine, lead-free pewter.
From a DIYer's perspective, the use of lead-free solder is a bug, not a feature. Its terrible to re-work - any chance of using normal 60/40 solder?
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Old 8th January 2013, 05:03 PM   #122
Can you say Audio?
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Can you provide just a little more information about the kit? Apologies - it may be due to language translation:

1) What if any components/modules come assembled? All? It seems they do (inspection and testing) but I want to be clear.
2)Welding machine, lead-free pewter - is a case included?
3) Apart from connectors and a USB receiver - what else is needed?

Excited about your work, just need more info :-)
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Old 8th January 2013, 11:01 PM   #123
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Anyone know any reason why my lead free DAC chips slowly develop a grayish color residue/contaminant around the pins after the chip is soldered to the PCBS? Eventually, this residue causes increasingly audible distortion until I clean it off with contact cleaner spray, but then the residue build up slowly again. This chemical reaction residue, or whatever it is, has appeared with multiple PCM1794A chips I've mounted. I'm thinking this is being caused by some kind of reaction between the lead-free pins of the chip and the lead bearing solder of the pre-tinning PCBs provided by my board supplier, but I really don't know. Anyone else had this problem, or know what is causing it?
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Last edited by Ken Newton; 8th January 2013 at 11:09 PM.
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Old 10th January 2013, 10:45 PM   #124
i2k92 is offline i2k92  Indonesia
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Quote:
Originally Posted by MisterRogers View Post
Can you provide just a little more information about the kit? Apologies - it may be due to language translation:

1) What if any components/modules come assembled? All? It seems they do (inspection and testing) but I want to be clear.
2)Welding machine, lead-free pewter - is a case included?
3) Apart from connectors and a USB receiver - what else is needed?

Excited about your work, just need more info :-)
I guess what he means by no 2 is soldered by machin using, lead free solder (to be ROHS compliant).
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Old 10th January 2013, 11:35 PM   #125
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Quote:
Originally Posted by MisterRogers View Post
Can you provide just a little more information about the kit? Apologies - it may be due to language translation:

1) What if any components/modules come assembled? All? It seems they do (inspection and testing) but I want to be clear.
2)Welding machine, lead-free pewter - is a case included?
3) Apart from connectors and a USB receiver - what else is needed?

Excited about your work, just need more info :-)
1 x Kit DAC
2 x Kit IV
1 x Volum Kit + Remove
all tested
thanks
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Old 10th January 2013, 11:37 PM   #126
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Quote:
Originally Posted by i2k92 View Post
I guess what he means by no 2 is soldered by machin using, lead free solder (to be ROHS compliant).
you can buy it: Amanero Technologies
and put in the DAC , and run from computer
thanks
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Old 10th January 2013, 11:42 PM   #127
Can you say Audio?
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I'm sorry Quangho - I may not be making myself clear, but your posts do not address any of my questions. Let me try again.

1) Is the Dac kit assembled? Yes? No? Partially?
2) Are the IV Kits assembled? Yes? No? Partially?

I have a couple Combo384's and no how to use them - thanks. I wanted to know what else would be needed for a complete DAC.

Case? Power Transformers?

Thanks Quangho - we'll get there :-)
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Old 11th January 2013, 12:00 AM   #128
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[QUOTE=MisterRogers;3320408]I'm sorry Quangho - I may not be making myself clear, but your posts do not address any of my questions. Let me try again.

1) Is the Dac kit assembled?
Yes
2) Are the IV Kits assembled?
Yes
3, 1 x Volum Kit + Remove assembled?
yes

I have a couple Combo384's and no how to use them - thanks. I wanted to know what else would be needed for a complete DAC.

you only put on the dac, and use the remove controller and play the music

You need transformer for dac
1. 0-6 VAC to 9VAC/ 1A x 2 for DAC

2. 18-0-18VAC/500mA x 2 for IV

3. And one Combo384's ( only put in the DAC )

You have a DAC
thanks
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Last edited by quanghao; 11th January 2013 at 12:04 AM.
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Old 11th January 2013, 12:04 AM   #129
Can you say Audio?
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Perfect! Thanks Quangho!
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Old 11th January 2013, 06:10 AM   #130
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I am interested. I presume you will only make the boards after 50 orders received rather than 50 orders minimum per person?
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