DEC Rainbow / Pro video on VGA monitors?

Paul Koning paulkoning at comcast.net
Sat Jan 19 15:38:16 CST 2019



> On Jan 19, 2019, at 1:57 PM, Warner Losh via cctalk <cctalk at classiccmp.org> wrote:
> 
> Greetings,
> 
> I'm trying to find a way to get my DEC Rainbow's monochrome output onto a
> newer monitor than my aging VR201 (especially since I zapped something in
> it and my diagnostic efforts to date haven't fixed it).
> 
> So, I found the bit in the Rainbow docs that said the output was DC Coupled
> RS-170 signals and to convert to RS-170 (NTSC black and white) I needed to
> put a 10uF cap inline to make it RS-170. So I did this, and fed it into a
> generic NTSC composite video to VGA thing, and got only a little joy. The
> first few lines seem to be missing, then the next few are OK and then
> nothing else.

I'd be interested in the answer also, for my Pro.

What device do you use for NTSC to VGA conversion?

	paul



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