Suffolk Tony
Aim low, achieve your goals, avoid disappointment.
Wow! Thank you Mr Bemused Sir, just some tidying around has cured the problem & this DAC's sounding really terrific. So much better all round than with the standard upsampling board.
I repositioned the Flea, mounted it on some proper standoffs, shortened & added some more twists to the signal wires between Flea & upsampling board, unsoldered the trafo. to RCAs and RCA digital input to board & retwisted, rerouted cabling here and there. An important lesson learned!
I think I'll tidy up the soldered connections on the trafos - done when I was very unsure about what I was doing (not that I'm exactly confident now...)
I repositioned the Flea, mounted it on some proper standoffs, shortened & added some more twists to the signal wires between Flea & upsampling board, unsoldered the trafo. to RCAs and RCA digital input to board & retwisted, rerouted cabling here and there. An important lesson learned!
I think I'll tidy up the soldered connections on the trafos - done when I was very unsure about what I was doing (not that I'm exactly confident now...)