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Old 1st May 2007, 08:37 AM   #1741
karma is offline karma  Canada
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Quote:
Originally posted by Peter Daniel
The boards are available for immediate delivery, price is $30/pc.
This is basically same DAC as before, the only difference is the USB input interface based on PCM2706/7 chip.
peter is that pcb and parts ics? no transformer


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Old 1st May 2007, 02:38 PM   #1742
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$30 is for PCB only, parts are available extra.
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Old 1st May 2007, 02:43 PM   #1743
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Quote:
Originally posted by nycavsr2000
Have you posted your impressions of the USB version of your dac? I'm curious as the schematic looks greatly simplified (no SPDIF!! conversion needed!). The board looks beautiful, on my short list to order, even though I'm enjoying your SPDIF version of your dac. Lots of PRAT!
The circuit is about as complicated as the other DAC. The signature is very similar too, as you mentioned, PRAT is a strong feature of that DAC.

I still need to configure my PC for otpimum playback though.
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Old 3rd May 2007, 08:07 PM   #1744
orto is offline orto  United States
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The schematic for the lm4780 suggests a transformer with 22+22V, how much can you deviate from this? I've found some decently priced Avel's from parts express for around 60 bucks, they're 330va and 25+25V.

Thanks once again.
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Old 3rd May 2007, 10:16 PM   #1745
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Quote:
Originally posted by orto
...they're 330va and 25+25V.
That would be fine too. The max specified supply voltage to the chip is some +/- 42V DC, as long as you not exceed it you should be OK.
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Old 4th May 2007, 03:02 AM   #1746
moe29 is offline moe29  United States
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i know this is a stupid question... but does Windows recognize the
DAC when you connect it via USB? Or do you have to have a sound
card with a USB out. I feel so stupid, i should know this, LOL.
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Old 4th May 2007, 03:21 AM   #1747
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I use it with IBM T42 laptop and Windows recognizes it automatically, either at start up or when USB connector is being plugged in.
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Old 4th May 2007, 04:11 PM   #1748
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Hi Peter,

I would like to build your usb DAC. You mentioned the boards costing 30 dollar. Do you supply a kit version of this dac, and at what prize?

regards,

Adriaan
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Old 4th May 2007, 04:22 PM   #1749
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Hey Tweety, check out this post

http://www.diyaudio.com/forums/showthread.php?postid=1170936#post1170936]usb dac

Gives a price for the DAC. Peter said that the USB dac was the same price as this.
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Old 4th May 2007, 04:31 PM   #1750
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Actually the USB version will be cheaper as there is less "exotic" components here. Presently, the complete kit, as pictured, is USD$200. Later I might bring the price up. All parts are in stock for immediate shipment.
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File Type: jpg usb1.jpg (90.4 KB, 2126 views)
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