Pushing the limits of TDA1543 NOS DAC - Page 30 - diyAudio
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Old 7th April 2014, 09:10 AM   #291
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Any similar XOR Gate should do. Although my suggestion would be to omit this chip altogether, unless you expect to be swapping polarity very often. You can correct absolute phase by simply swapping your speaker cables so that amp "-" goes to speaker "+". Just remember to swap cables for both speakers, otherwise you will end up with speakers playing out of phase.
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Old 8th April 2014, 09:28 PM   #292
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?? the chip is used for splitting the data signal for the two chips.
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Old 22nd April 2014, 04:12 PM   #293
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Hi Peter,
I am looking at images from your audiosector website that shows a version of your TDA1543 SPDIF DAC on a single PCB. It has a single Hammond 16V(229D16) transformer. I am a fledgling builder in the digital realm and was hoping to build this project as a learning tool. Am I right in the one transformer? If so did this operate both DAC and receiver with 16V instead of the 18V shown in this DIYAudio build? If I can do with single is there any forum conversations on that design I can reference?
Thank you for your help, your ideas and build skills are inspiring.
Steve(hartbigsky)
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Old 22nd April 2014, 06:34 PM   #294
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Hi,

I built the analogue section of the design posted in Uncle_Leon's post #237. Currently it is fed with a I2S signal from my Amanero, but next step will be to build the digital section with the cs8412.

For IV coupling capacitors, I am using some Dayton Audio 4.7uF 250V Polypropylene Capacitors from Parts Express. I wanted to try some other capacitors but wasn't sure if I needed to stick to the 4.7uf value. Are there any good alternatives that can be recommended (in lieu of Blackgates)? Should I stick to 4.7uf? TIA for any advice.

Link to post # 237:
Pushing the limits of TDA1543 NOS DAC
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Old 22nd April 2014, 07:11 PM   #295
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Please disregard my post, I just saw post #247 which answered my question
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Old 23rd April 2014, 09:09 PM   #296
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Quote:
Originally Posted by hartbigsky View Post
Hi Peter,
I am looking at images from your audiosector website that shows a version of your TDA1543 SPDIF DAC on a single PCB. It has a single Hammond 16V(229D16) transformer. I am a fledgling builder in the digital realm and was hoping to build this project as a learning tool. Am I right in the one transformer? If so did this operate both DAC and receiver with 16V instead of the 18V shown in this DIYAudio build? If I can do with single is there any forum conversations on that design I can reference?
Thank you for your help, your ideas and build skills are inspiring.
Steve(hartbigsky)
You can find forum discussion here: Audiosector USB DAC

It's perfectly fine to use single transformer. I'm using Hammond with dual 8V windings: one for DAC, one for receiver circuit.
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Old 25th April 2014, 08:24 PM   #297
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[QUOTE=Peter Daniel;3902632]You can find forum discussion here: Audiosector USB DAC

Your implementations always look very good Peter. As an aside, what are the power supply inductors and those nice PCB mount RCA jacks shown in your link? Gerrit
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Old 27th April 2014, 03:14 AM   #298
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Thanks for answering my post, how do you get your p2p so close???!!!!Are most contacts the part leads? Also one image looks like the TDA1543 are sitting on a silver case of some type? Do you have any p2p instructions anywhere? Thanks!!!
hartbigsky
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Old 3rd May 2014, 12:44 PM   #299
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TDA1543 sits in a socket, for easy swapping when offset needs adjustment.

I try to use the component leads for most of the connections; with some practice, making it p2p like that is not a big deal. Besides the pictures and schematics, there's no other instructions.
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Old 7th May 2014, 02:31 AM   #300
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Is the socket metal? It looks shiny, or is there just shielding you place around socket. The 8 pin dip sockets I have are plastic body, or do you use something different? Once again thanks for your time!
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