> I've thought about using an ethernet cable and putting usb connectors on =
the ethernet cable.
> But, ethernet uses balanced transmission line (twisted pair)...it might n=
ot work well for usb
> because USB doesn't use a balanced line-so there is little benefit to be =
had by moving to ethernet cable for usb data transmission.

Why do you say USB is not a balanced signal? It quite definitely is a balan=
ced signal, the data lines are called D+ and D-, and when laying out a PCB =
definitely need to be laid out as a differential pair.

I suspect your problem with the long cable is purely one of voltage drop in=
 the cable if it really is drawing 350mA. I would try some method of poweri=
ng the receiver locally. Rather than down the length of cable.



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