moding P Daniel's NOS DAC?

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From a discussion over at diyhifi.org, i was thinking about doing the following change to the Peter Daniel NOS DAC, in particular, adding an input transformer and balancing the signal.

What I plan to do is the right hand part of this schematic (right of 'cable'):
 

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Here is the original circuit of the DAC:

http://www.diyaudio.com/forums/attachment.php?s=&postid=609968&stamp=1112327211

Really, I hardly have an idea what I'm doing, so if there is a disaster eminent, please warn me. Otherwise, I'm going to try it out.

NB - I have already built the left hand side of the above circuit, and it is a definite improvement over the stock SPDIF output in my Delta 1010lt..

:angel: = lack of knowing better
 
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