Re: [LAD] [OT] 3ghz coax and soldering...

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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Received on Wed Jan 19 04:15:01 2011