Hi Joern,
If it is an option: use Leerrohre (DE for "empty tubes" ?) to make it
future-proof, rather than to rely on cable-standards. In a few years you
may want to replace coax with optical or whatever.
The only question I can answer is #4: The problem is reflections caused
by skin-effect if you do solder them. Back in the days that I spent in
the physics dept. we used solder-less crimp connectors for everything
high-freq.
On 01/18/2011 10:59 PM, Jörn Nettingsmeier wrote:
  hi everybody!
 forgive the ot post, but i hope there are some brains to pick here.
 i'm planning a studio, and to make it future-proof, there is coax in
 every room. currently it's going to be used for rgbhv and composite
 video, but i want it to be future-proof for MADI and HD-SDI.
 the cabling itself is of sufficient quality, but i'm doubtful about the
 connectors. the whole installation has a star topology, so the worst
 case is
 * source
 * 5m or so of suitable cable
 * bnc wall socket
 * 20m installation cable (-63dB/100m @ 3ghz)
 * a ghielmetti patchbay (which includes two canare contacts to the patch
 cord and two bnc on the rear, unfortunately)
 * another 20m installation cable
 * bnc wall socket
 * another 5m cable
 * sink
 question 1: any hopes for reliable hd-sdi?
 question 2: how can it be that a kick-ass company like ghielmetti does
 not offer video patchbays that allow direct connection of coax
 installation cables, but require rear bnc connections instead?
 question 2b: is there an alternative for direct rear coax connection,
 thereby cutting out two potentially disruptive contact surfaces?
 question 3: i'm thinking of getting neutrik isolated bnc connectors (the
 d-type ones that are semi-recessed and thus well protected from clumsy
 passers-by). but their soldering lugs break the coaxial structure -
 cause for concern?
 question 4: do i really want to solder hf stuff (even though the
 voltages are not too high), or will it unsolder itself eventually? any
 recommendations as to procedures and tin?
 thanks in advance,
 jörn
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