3 May
2021
3 May
'21
6:29 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