Update: Received my 50lb Datapoint 2200 computer from Austria via regular post.

Holm Tiffe holm at freibergnet.de
Tue Sep 24 01:50:31 CDT 2019

Ethan Dicks via cctalk wrote:

> On Mon, Sep 23, 2019 at 4:36 PM steven stengel via cctalk
> <cctalk at classiccmp.org> wrote:
> > Found a Datapoint 2200 in Austria that I wanted - I asked seller Viktor to pack it well, by wrapping it several times in big-bubble bubbewrap, until it was just a giant cube of bubble wrap.
> Looks like it was worth it.
> > See pics here:
> > http://oldcomputers.net/box/
> > Second - what to do about that screen?
> As someone pointed out, that looks like "CRT cataracts" - where the
> PVA layer between the face of the CRT and the implosion field breaks
> down.  I've had to fix DEC terminals with this condition (and others
> here have had similar experiences on certain devices).  There are ways
> to get the protective glass off the front.  I used a wire to slice
> through the PVA.  Others have reported using heat guns to soften the
> PVA.  In the case of the VT220, I needed to put the glass back after
> cleaning both surfaces because just the CRT along wasn't thick enough
> to fit in the bezel with the original mounting technique.  It did
> depend on the PVA layer.  I found some 3M Silicone Tape (3M VHB Tape
> 4910?) that was clear and 1mm thick.  I just put squares on the
> corners but it would likely work if you edged the entire area to keep
> dust out of the space between.
> I know DEC VT220s and VR201s are prone to this condition and I believe
> I've read about ADM 3A terminals with the same.  Some terminals use
> bare CRTs (thicker face glass, or just manufactured to older
> standards?)
> -ethan

Just a comment.. such picture tubes with the PVA layer seem to be
completely unusual in the former eastern block countires.
They all used tubes with thick fron glass for implosion protection.

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