Atari 800XL RF cable (and I/O cable availability?)

I picked up a little Atari 800XL bundle the other day (system, pair of 1050 drives, and an 850 expansion box) - cheap because it was missing cables and power supplies. 1) When hooking this up to a TV via the RF input - is there any "magic" involved, or will a suitable braided co-ax TV cable with a phono connector added at the Atari end do? I know it "works" because I lashed one up quickly (and I do mean quickly, no soldering involved) and ran the machine then when it came to making a good one, I got to thinking about those little antenna switch boxes that US machines often seemed to come with, and wondering if there were a bunch of passive components in there which make a difference to the signal quality. 2) Does anyone have any spare I/O cables, or know of a source of the connectors so I can make my own? (I suppose while I'm here I may as well ask if anyone just happens to know what voltage power supplies the 1050's and 850 need, but I'm sure I can dig the answers to that up online if needed) cheers Jules