That VAXStation4000vlc 3W3 video connector
paulkoning at comcast.net
Tue May 4 08:38:53 CDT 2021
> On May 4, 2021, at 1:50 AM, Doug Jackson <doug at doughq.com> wrote:
> HI Paul,
> "I don't know what "HD BNC" means. There's only one BNC"
> Years ago when working in a university with Photomultiplier tubes, we used HV BNC connectors - these looked like standard BNC, but were rated at 10kv.
Those are MHV connectors, not BNC, the description makes that clear.
> We also used to use 75 Ohm BNC connectors for video systems.
Sure. Those are the same shape and size as regular BNC connectors; the difference is in the insulation to produce a 75 ohm characteristic impedance.
> It is worth noting that there are multiple BNC connectors.
Yes, I see your point. What I meant is that "BNC" refers to a given shape and size. As for the "HD BNC", that's news to me but it seems to be merely a standard BNC connector with slightly tweaked tolerances or materials to be rated to a higher top frequency. For the application we're talking about here, the frequency rating of an ordinary BNC connector is way better than what's needed.
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