[vcf-midatlantic] replacing mono display DEC Rainbow

william degnan billdegnan at gmail.com
Wed Apr 19 12:07:38 EDT 2017

On Wed, Apr 19, 2017 at 11:54 AM, Ian Primus via vcf-midatlantic <
vcf-midatlantic at lists.vintagecomputerfederation.org> wrote:

> The cable to the VR201 is very, very simple. It contains monochrome
> composite video, and the direct passthrough for the keyboard lines.
> You can make up an adapter to allow you to use a standard monochrome
> composite monitor and the LK201 keyboard.
> Pin 12 - monochrome composite video signal
> Pin 4 - video shield ground
> Pin 5 and 6 - ground
> Pin 7 and 8 - 12V
> Pin 14 - RX data keyboard
> Pin 15 - TX data keyboard
> See here for the pinout of the LK201 keyboard:
> http://www.netbsd.org/docs/Hardware/Machines/DEC/lk201.html
> You can rig up this adapter and use any normal monochrome composite
> monitor with the Rainbow. Best results on quality monitors with
> adjustments for height, it'll overscan on some things like security
> monitors. Likewise, it's real easy to rig up the VR201 to work on
> anything else, it's a fantastic, sharp, clear little monitor. The
> screen rot can be fixed, I've done a few CRTs like this. You basically
> need to remove the tube, heat the faceplate very carefully with a heat
> gun to get it to delaminate, clean all the gunk out, and stick it back
> together.
> -Ian
thanks everyone for the info

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