Nice LAB11 brochure.

Bob Rosenbloom bobalan at
Mon May 2 16:40:41 CDT 2016

    On Monday, May 2, 2016 1:21 PM, Paul Koning <paulkoning at> wrote:

> On May 2, 2016, at 3:59 PM, Mattis Lind <mattislind at> wrote:
> Yet another nice color brochure.
> Has anyone seen a VR20 in real? Rather interesting to be able to do a red
> and green X/Y screen based on different energy levels. Someone care to
> explain how that works?

See  The idea is that there are two layers, and a high voltage beam pokes through the first to activate the second.

I think Tektronix made monitors of this type, but apparently GE invented them.  I remember hearing about that technology in the 1970s; I never actually saw one in the wild (from any manufacturer).

> If I read the fine print on the back correctly (and comparing with the
> others) I would guess that this brochure is from 1971.

Assuming that 00771 is a date code, yes.  The cover photo is interesting (PDP11 with PDP12 color scheme!) but the console looks like an LA30.  I didn't know those were out in 1971.  The first (and fortunately only) one I encountered was in 1974.


I believe they used a beam penetration tube in the VR20. I have an HP 1338A that uses that technology.Google it, it's interesting.

More information about the cctalk mailing list