Power cord used with phono pre- amp?

I bet you have done a lot of cable comparisons on your way to nirvana.

Hi AQ4L :-),
well, honestly, yes, some. But I am not a cable fanatic, I think the best investment is in better electronics. Cables are normally used to compensate something weak in the chain or to bend the sound to owners taste (whatever this will be). Discussions about that are like rolling a dice ... :-)

The problem with "this" kind of "upgrade" is, that it won't survive a comparison with another piece of electronics which is done better internally.
But anyway, from my experience, best for bang you can do is to replace the connector only. I use Oyaide, they are good from specs and contact area.