That VAXStation4000vlc 3W3 video connector

[Doug Jackson]

Hi Paul,

I also found an example of the HD BNC connector - It is interesting.

https://au.element14.com/amphenol-rf/095-850-188m050/rf-coax-hd-bnc-plug-hd-bnc-plug/dp/2766835?CMP=KNC-GAU-GEN-DSA-PDP-PAGE&mckv=s_dc|pcrid|435342446135|pkw||pmt|b|slid||product||pgrid|98446732062|ptaid|dsa-922446159331|&gclid=Cj0KCQjwvr6EBhDOARIsAPpqUPGZY4Ngl7SU6FHq9pxKQ8X19QmsxNvM0S6tFazGERm0QBSNbwd46fUaAjkZEALw_wcB


Kindest regards,

Doug Jackson

em: doug at doughq.com
ph: 0414 986878

Check out my awesome clocks at www.dougswordclocks.com
Follow my amateur radio adventures at vk1zdj.net

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On Tue, 4 May 2021 at 15:50, 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.
>
>
> https://www.radiall.com/products/rf-coaxial-connectors/high-voltage-connectors/bnc-ht-mhv.html
>
> 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
>
> It is worth noting that there are multiple BNC connectors.
>
>
> Kindest regards,
>
> Doug Jackson
>
> em: doug at doughq.com
> ph: 0414 986878
>
> Check out my awesome clocks at www.dougswordclocks.com
> Follow my amateur radio adventures at vk1zdj.net
>
> -----------------------------------------------------------
>
> Just like an old fashioned letter, this email and any files transmitted
> with it should probably be treated as confidential and intended solely for
> your own use.
>
> Please note that any interesting spelling is usually my own and may have
> been caused by fat thumbs on a tiny tiny keyboard.
>
> Should any part of this message prove to be useful in the event of the
> imminent Zombie Apocalypse then the sender bears no personal, legal, or
> moral responsibility for any outcome resulting from its usage unless the
> result of said usage is the unlikely defeat of the Zombie Hordes in which
> case the sender takes full credit without any theoretical or actual legal
> liability. :-)
>
> Be nice to your parents.
>
> Go outside and do something awesome - Draw, paint, walk, setup a
> radio station, go fishing or sailing - just do something that makes you
> happy.
>
> ^G ^G ^G ^G ^G ^G ^G ^G- In more laid back days this line would literally
> sing ^G ^G ^G ^G ^G ^G ^G ^G
>
>
>
>
> On Tue, 4 May 2021 at 15:30, Paul Koning via cctalk <cctalk at classiccmp.org>
> wrote:
>
>> I don't know what "HD BNC" means.  There's only one BNC.  By 3W3 do you
>> mean the D-sub shell with 3 coax inserts?  Those are standard items, you
>> could just buy one.  The only problem you might encounter is that the cable
>> connector kind is probably crimped, and the crimp tooling is likely
>> expensive.  But a solder or PC mount connector could be used, with an
>> impedance bump that can be ignored for video applications.
>>
>> Sync on green is the usual from DEC.
>>
>>         paul
>>
>> > On May 3, 2021, at 7:22 PM, Adam Thornton via cctech <
>> cctech at classiccmp.org> wrote:
>> >
>> > I assume it would be way too much to hope that HD BNC would fit it?
>> Does
>> > anyone have a pointer to the actual physical dimensions of the
>> itty-bitty
>> > BNC-ish connector in the video port of the VAXStation4000vlc?  If I can
>> get
>> > red, green, and blue out (assuming since there are only 3 connectors
>> it's
>> > sync-on-green) I can put together a sync splitter and turn it into
>> VGA.  I
>> > have at least one decent multisync VGA monitor still, although none with
>> > the RGB BNC inputs.
>> >
>> > Adam
>>
>>