Gary Bronner from New York, USA, was among the firsts reporting a working unit. MDF board convenient for some experimenting, Caddock I/V resistors, CS8414 in the SO => DIP converter...

Gary has pointed out an S/PDIF transformer differential termination. Some say CS841x likes it and according to what I've heard I can confirm it. Gary's recommended circuit includes also transformer's primary side capacitively coupled to the ground, so its absence is my intervention; I did found it sounding better when it is left floating, assuming the S/PDIF line's ground is coupled at a transmitter's side, and it usually is. In the case it however is not, this coupling is advisable to prevent EMI.

Some more ideas on the topic of transformer coupled S/PDIF receiving interface offered by Jocko Homo can be found here.

Gary has also pointed out extreme importance of polarity of the mains transformer used for a reclocker. (Since in this DAC I use one transformer for all the DAC circuits I have tried swapping polarity of the transformer's secondary feeding the reclocker and found it to be of higher importance than any transformer polarity I have ever experienced.)
 

The device below has been made by Roy Pafenberg, USA. One of the units that started to sing without a case but otherwise done very ambitiously. It has one of the most impressive transformers set ups I have ever seen in DACs, the whole six independent units, each having own box...

Leo Kirkbride, Mansfield, UK, who has already been familiar with the concept modifying own Arcam Alpha 5+ (which employs TDA1541A) putting it into the non-o/s mode and applying the AD844 non-f/b stage reported also finished DAC based on this PCB.

He submitted the pics of the DAC in the working phase (new pics of the DAC in the case should follow soon). At right it is the Antrim custom made transformer ordered in the group buy organized once by Jon Clancy at diyA. Contrary to the conventional audiophile wisdom, Ron has found that the Panasonic FC capacitors were sonically inferior to standard electrolytic caps when used like reservoir pre regulator units. Ron also has found the bypass cap in the TDA1541A's -15V supply had extreme importance and settled on 0.1uf Multicap RTX. As the pic shows he also uses Caddock TFO20 for I/V. Ron preferred these to Vishay, Holco, Riken and Caddock MK132.

Bryan Failing's (San Jose, California, USA) device below. Extremely seriously done whole unit, including the chassis.

Transformer is terminated differentially (as shown above) using the SMD parts. Those familiar with the board will note that the center connection of the terminating resistors/capacitors has to be additionally grounded (here done by the wire whose tip can be seen between the SMD resistors/caps).