That VAXStation4000vlc 3W3 video connector

Jonathan Stone kiwi_jonathan at
Mon May 3 19:31:25 CDT 2021

 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.


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