That VAXStation4000vlc 3W3 video connector

dave.g4ugm at dave.g4ugm at
Tue May 4 03:35:11 CDT 2021

 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


> -----Original Message-----
> From: cctech <cctech-bounces at> On Behalf Of Jonathan
> Stone via cctech
> Sent: 04 May 2021 01:31
> To: General Discussion: On-Topic Posts <cctech at>; Adam
> Thornton <athornton at>
> 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> 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

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