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Old 12th June 2009, 04:38 PM   #511
Javin5 is offline Javin5  Switzerland
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Quote:
Originally posted by Beefy
... And will you offer a LCDPS equivalent as well? ...
If the two GNDs were not common, and a 4 instead of a 3-output connector were used, the board would be more universal. By not joining the two GNDs at the board level, you may also gain more freedom to avoid ground loops. And you would only need a single board in your inventory. Preferably, this could of course also be an LCDPS. By appropriate connection of the output voltages, you could use the board to supply either bipolar or dual supply needs.

Is there a possibility to further expand the output connector with Kelvin sense pins? Maybe in a next revision?

Kurt
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Old 12th June 2009, 04:44 PM   #512
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Quote:
Originally posted by Javin5


If the two GNDs were not common, and a 4 instead of a 3-output connector were used, the board would be more universal. By not joining the two GNDs at the board level, you may also gain more freedom to avoid ground loops. And you would only need a single board in your inventory. Preferably, this could of course also be an LCDPS. By appropriate connection of the output voltages, you could use the board to supply either bipolar or dual supply needs.

Is there a possibility to further expand the output connector with Kelvin sense pins? Maybe in a next revision?

Kurt
Hi Kurt, I took a different approach here. This is a truly complimentary circuit. Not just two regulators in series as I had said was (and is) possible.

There will be a smaller single supply that can be used where you would use LCDPS. I just decided to do the bipolar version first.

Kelvin sense is possible, but I have found it not especially effective especially if the wiring is short.

Cheers!
Russ
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Old 12th June 2009, 06:59 PM   #513
Javin5 is offline Javin5  Switzerland
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Quote:
Originally posted by Russ White

... Kelvin sense is possible, but I have found it not especially effective especially if the wiring is short ....
Russ, I fully agree as long as the wiring is indeed short. Also, it is my understanding that to do the Kelvin sensing right, you will actually need two sense wires. My thoughts were that the sensing might allow you to put everything related to power supply stuff on one side of the chassis and all the analog stuff on the other side, which could result in somewhat long wiring.

Anyway, I'm looking forward to your new supply board, and thanks for all the work you are constantly doing for the DIY-community.

Kurt
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Old 15th June 2009, 02:52 PM   #514
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Russ those Placid boards look fantastic!
I hope testing goes well ^^
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Old 15th June 2009, 05:58 PM   #515
Nielsio is offline Nielsio  Netherlands
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Click the image to open in full size.

I'll write my impressions after I've listened some more.
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Old 16th June 2009, 05:33 AM   #516
brgds is offline brgds  Poland
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Russ,
are you going to publish the diagram, especially output stage? or at least reveal it to those diyers who purchased B32?
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Old 16th June 2009, 06:04 AM   #517
hayenc is offline hayenc  United States
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This DAC sounds awesome on first listen. Most impressive is the detail in the rear of the soundstage. So much detail behind a singer such as Norah. Much more detail on first listen than even the dual mono Opus.

Great job, Russ.

Craig
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Old 16th June 2009, 10:41 AM   #518
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Quote:
Originally posted by brgds
Russ,
are you going to publish the diagram, especially output stage? or at least reveal it to those diyers who purchased B32?

As I have said from the beginning I will mot publish the schematic yet.

I do not want it to be copied right away.

Cheers!
Russ
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Old 16th June 2009, 10:44 AM   #519
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Quote:
Originally posted by hayenc
This DAC sounds awesome on first listen.

Great job, Russ.

Craig
Thanks Craig,

I really appreciate that.

Brian deserves a lot of credit as TPA would not exist without him. I know I am very grateful for for his dedication.

Cheers!
Russ
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Old 16th June 2009, 10:56 AM   #520
Beefy is offline Beefy  Australia
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Quote:
Originally posted by Russ White
I do not want it to be copied right away.
Are you still planning to copy it yourself as an update to the current stand-alone IVY? While I cannot afford the B32, I would love to try the IVY 2 with my existing Buffalo......
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