> On May 4, 2021, at 1:50 AM, Doug Jackson <[email protected]> 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.
>
> https://www.radiall.com/products/rf-coaxial-connectors/high-voltage-connectors/bnc-ht-mhv.html
Those are MHV connectors, not BNC, the description makes that clear.
> We also used to use 75 Ohm BNC connectors for video systems.
>
> https://www.hubersuhner.com/en/products/radio-frequency/connectors-adapters/bayonet-connectors-bnc/bnc-75-real
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.
paul
