| i) if I want to send composite video (the sort that normally comes out
| of a single yellow phono socket) from a DVD player to a monitor, about
| 10-15 meters along a cable, what sort of cable should I use? I have
| some runs of Maplin's XR21X. Is that likely to work OK, or will I
| need some specific coax (I don't either the player or the monitor yet,
| otherwise I could just try it out!).
XR21X, for those who don't have Maplin stock codes engraved in their memory,
is some figure-8 single-core screened audio cable.
You can try it, especially if it is already in place, as there's a good
chance it will work, but you may find you get a poor picture and need proper
video cable. Any 75ohm video cable should do, you could probably even use
'brown low-loss' TV aerial cable, but most of that isn't fit for TV aerials.
For any TV/video use, CT100 or equivalent satellite cable is usually
recommended. Maplin's price is 99p/m for XS16S, you should be able to find
it for less. Even Maplin half the price per m for a 100m reel. Not sure how
well it would fit into a phono plug thought.
Or you could use XS41U which is actually sold for making up composite video
SCART cables, so it should be suitable, and it's also 99p a m and would
carry an audio feed too.
| ii) I'd like to set up some audio switches near the computer. The
| basic idea is this:
| Input 1: Line in from DVD Player
| This might work with 2 rocker switches (the point is that Output 1
| is either Input 1 or Input 2; Output 2 is either Input 2 or Input 3).
| Alternatively if I had 2 x 3(or more)-position rotary switches, I
| could select any of the inputs for either of the outputs. In both
| cases the switch would have to switch all four lines that come with a
| standard pair of phono plus.
You have to watch that you don't connect the outputs of two devices together
into one input. An output can feed multiple inputs, but you shouldn't shove
several different source outputs into the same input.
| It looks as though 2x Maplin's CN47B would do the trick.
A 4-way stereo audio switch box.
Have a look at L62AB a 4 input 2 output audio/video selector. "Either output
can independently select any input. A built-in apmpliier compensates for
insertion losses" - this is probably for the video only and the thing can
probably be used without power for audio. Neater and, at 19.99, cheaper than
2 x CN47B at 12.99 each.