3 May
2021
3 May
'21
7:22 p.m.
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
3 May
3 May
8:05 p.m.
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
4 May
4 May
1:50 a.m.
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-connect…
We also used to use 75 Ohm BNC connectors for video systems.
https://www.hubersuhner.com/en/products/radio-frequency/connectors-adapters…
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
1:56 a.m.
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…
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 15:50, 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-connect…
We also used to use 75 Ohm BNC connectors for video systems.
https://www.hubersuhner.com/en/products/radio-frequency/connectors-adapters…
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
>
>
6 a.m.
On Tue, 4 May 2021 at 07:50, Doug Jackson via cctalk
<cctalk at classiccmp.org> wrote:
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
Doug, could I ask you to please pay a little more respect to mailing
list etiquette?
Your reply should go _below_ the text you are replying to, not above.
The maximum length for a signature is 4 lines of 80 characters or
fewer, and the sig should be prefixed with a line containing two minus
signs then a space.
--
Liam Proven ? Profile: https://about.me/liamproven
Email: lproven at cix.co.uk ? gMail/gTalk/gHangouts: lproven at gmail.com
Twitter/Facebook/LinkedIn/Flickr: lproven ? Skype: liamproven
UK: +44 7939-087884 ? ?R (+ WhatsApp/Telegram/Signal): +420 702 829 053
9:38 a.m.
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.
https://www.radiall.com/products/rf-coaxial-connectors/high-voltage-connect…
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.
paul
3 May
3 May
8:09 p.m.
I used CONEC 131J20019X to build my 3w3 to vga cable. Here's the datasheet
with dimensions:
https://cdn-reichelt.de/documents/datenblatt/C120/MIXSTGCO.pdf
On Tue, May 4, 2021 at 1:23 AM 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
8:31 p.m.
You need a video cable with a 3W3 connector on one end. Original was likely a DEC
BC29G-10.
That, plus 5BNC-to-VGA cables, and 3 F/F BNC barrels, will work with a multisync monitor
that handles sync-on-green.
I just went through this with several DECstations, where the Turbochannel graphics options
have the same 3W3 connector.
On Monday, May 3, 2021, 04:23:05 PM PDT, 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
9:29 p.m.
On Tue, 4 May 2021, Jonathan Stone via cctech wrote:
You need a video cable with a 3W3 connector on one
end. Original was likely a DEC BC29G-10.
That, plus 5BNC-to-VGA cables, and 3 F/F BNC barrels, will work with a multisync monitor
that handles sync-on-green.
I just went through this with several DECstations, where the Turbochannel graphics
options have the same 3W3 connector.
Or track down a 17-04816-01 part, which is a 6ft DA3W3M-to-DE15F adapter
cable (original DEC designation "CABLE ASSY,RND,VIDEO,3W3, 15POS HD") you
can wire an ordinary analog VGA cable directly to. Much neater and easier
than fiddling with bulky BNC adapters only to get to a VGA connector which
is not a proper coax line anyway.
Sadly I've got only two of those and would easily now have a use for at
least four, but I considered $66 per piece ~20 years ago a tad expensive
(and back then only had two video adapters that would require one anyway).
Cf. <https://manx-docs.org/collections/mds-199909/cd2/blitz/td2506.pdf>.
Failing either solution you can make your own adapter cable:
<https://uk.rs-online.com/web/p/products/0484903/>
<https://uk.rs-online.com/web/p/products/3115694/>
(you'll also need a case for the connector, the other connector and a
length of suitable cable of course). They have a US site too.
HTH,
Maciej
4 May
4 May
10:12 a.m.
On 04/05/2021 02:29, Maciej W. Rozycki via cctalk wrote:
Failing either solution you can make your own adapter cable:
<https://uk.rs-online.com/web/p/products/0484903/>
<https://uk.rs-online.com/web/p/products/3115694/>
(you'll also need a case for the connector, the other connector and a
length of suitable cable of course). They have a US site too.
Wow: ?2.47 for the housing but ?5.02 for each of the coaxial inserts ...
not cheap at all!
Mind you, I suspect that an original cable won't be much cheaper either.
Antonio
--
Antonio Carlini
antonio at acarlini.com
4:35 a.m.
Adam,
IBM used the same cable on the RS6000 and these pop up on e-bay from time to time.
You do need a monitor that will support sync-on-green
Dave
-----Original Message-----
From: cctech <cctech-bounces at classiccmp.org> On Behalf Of Jonathan
Stone via cctech
Sent: 04 May 2021 01:31
To: General Discussion: On-Topic Posts <cctech at classiccmp.org>; Adam
Thornton <athornton at gmail.com>
Subject: Re: That VAXStation4000vlc 3W3 video connector
You need a video cable with a 3W3 connector on one end. Original was likely
a DEC BC29G-10.
That, plus 5BNC-to-VGA cables, and 3 F/F BNC barrels, will work with a
multisync monitor that handles sync-on-green.
I just went through this with several DECstations, where the Turbochannel
graphics options have the same 3W3 connector.
On Monday, May 3, 2021, 04:23:05 PM PDT, 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
9:54 a.m.
On 05/03/2021 06:22 PM, Adam Thornton via cctalk 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.
These connectors (D-style shell same as regular 15, 25 and
37-pin shells) with several coax inserts)
are an industry standard. You can buy the connectors and
pins from the likes of Digi-Key, Mouser and Newark. They
require a fancy crimping tool, but for just 3 contacts, you
can probably solder or fudge it somehow. AMP (now TTI) has
excellent documents which you ought to be able to turn up at
one of the above distributors.
Jon
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