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

[Holm Tiffe]

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.

Regards,
Holm
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