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Old 6th February 2006, 06:47 AM   #751
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Default kit?

i went thru 30 pages out of 76 and couldn't find any pricing on nos DAC kit. What versions are available?

I would also like to use optical input instead of the one used in the kit.

What changes should I make and how would this affect the price?

Thank you Peter.
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Old 6th February 2006, 06:54 AM   #752
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Post #172, 165 and 169 have the info you need
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Old 6th February 2006, 04:40 PM   #753
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Hi Peter,

have you thought of building a balanced output DAC for us guys with Pass Labs gear? This might be a nice DAC for the xBOSOZ.

Thanks,

-David
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Old 6th February 2006, 04:45 PM   #754
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Yes, I'm actually thinking about implementing balanced outputs on a DAC. That would require additional DAC chip and phase reversing on data line feeding it. But it's hard to say when this becomes available.

Quote:
Originally posted by steenoe
Peter, after reading a few miles of this thread, I have to conclude this: You are the most patient and tolerant DIY'er on this board Pretty amazing Respect
Thanks Steen
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Old 6th February 2006, 06:56 PM   #755
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Quote:
Originally posted by DeanP
For all the Canadians, there is Richard Sumner Technology
I priced out a 750va dual24v sec for $88CAN shipped for $120CAN.
Wow, that's cheap compared to Plitron! Have you tried one? I've been wanting to build a 6 channel amp for my active setup, but the cost of the transformers has been holding me back.

Cheers
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Old 8th February 2006, 02:31 PM   #756
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Peter, I have a basic question about how to tie together the primaries for a toroid.

My 300VA toroids for your LM4780 arrived today. The primaries are 115-0, 115-0 and the secondaries are 25-0, 25-0. Our voltage is 230volts, so does that mean I have to tie the 115 from one group to the 0 of the other group, and do the same for both, then connect my supply from the wall to them?
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Old 8th February 2006, 02:42 PM   #757
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Here's a schematic supplied by Plitron, you should be able to figure out the connections for your transformers from that as well.

You should observe proper phase on the wires (marked with a dot on Plitron drawing)
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Old 8th February 2006, 03:12 PM   #758
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Thanks Peter. Just to reconfirm, I have to tie the white 115 to the brown 0, and apply voltage to the black and orange? Sorry, I am not good at this. My torroid cables are of different color coding but I believe they correspond to the above.
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Old 8th February 2006, 03:16 PM   #759
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There are two primaries on each transformer with ends marked 0 and 115. You connect them in series (115 connects with 0). The primaries of both transformers configured in such way are then connected in parallel and plug into 230V outlet.
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Old 8th February 2006, 06:08 PM   #760
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Peter, this is what I did, and the results I got. Please comment:

Blu (0v) . -----||------. Blk (0)


Grey (115v) ------||------ (25v) Red


Vio (0v). ------||------. Orange (0)


Brn (115v) ------|| ------(25v) Yellow


I tied Grey and Vio together and applied Live 240V to Brn and Neutral to Blu. I measured the primaries and they were giving 28.5V across Red/Blk and the same for Yellow / orange. Is this voltage too high for the LM4780 and did I wire it propperly?

Appreciate your reply b4 it is actually attached to the PSU and amp boards.

Regards.
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