ProtoDAC TDA1387 X8 project

[hifinet]

The Lundahl 1544a seems like a do it all, general purpose transformer. It can probably do want you want, you just need to figure out how to connect the windings properly.

I found this in Jensen AN-003, 2.4 - A Simple Alternative. A transformerless method of converting single ended to true balanced. From a transformer company. Very generous of them. I guess Bill is an indispensable engineer at Jensen.

Can this be applied to ProtoDAC? I am not sure.  The key phrase is "adds an impedance matched passive network to ground for the - output." Since it is balanced, the impedence of this path needs to match the output impedence of the ProtoDAC. It may take some trial and error.