Hey Charles,
I'm using a pair of Silver Audio Silver Breeze phono cables. I find that the cable run between the heads and tape amp input is pretty picky. Every change there has been obvious and I settled on these after a year or so of experimenting around.
The Silver Breeze isn't the cheapest cables around but they certainly aren't crazy expensive IMHO. I did demo a few more $$$ cables that were as good (if a little different sounding) and considering how much I love my Repro Amp, if I'd liked them a lot better I would've found a way to afford them.
I don't doubt that there is some way to DIY a cable similar to the Silver Breeze (it's an old design and I've had my pair for 10 years). Maybe I'll look into that (one of these days) since I would like to put one back in my phono system (where I got this one) and they never come up for sale used.