11 Aug
2019
11 Aug
'19
2:48 p.m.
On 8/11/19 2:21 PM, Warner Losh wrote:
On Sun, Aug 11, 2019, 11:29 AM Alan Perry via cctech
<cctech at classiccmp.org <mailto:cctech at classiccmp.org>> wrote:
On 8/11/19 6:58 AM, Charles via cctech wrote:
Nothing. Air. I think it was here that someone told me that a small CRT
like the VR201 doesn't need PVA filling the gap for implosion protection.
alan
Anyway. I did a bit more Googling and discovered
that plain water
dissolves the PVA goop just fine. No need to use a lot of expensive
alcohol which seems to be a less effective solvent anyway!
Last Christmas, I removed the old PVA from a DEC VR201 for a Rainbow
100. On the advice of a website that I found, I bought butyl acetate
and
a long needle syringe for injecting it deep into the PVA.
However, after I removed the seal around the glass/tube, the glass
practically fell off and most of the PVA came off in a sheet. I had
some
electronics grade isopropyl alcohol around anyway and I used that to do
a final clean of everything before reassembly and reseal.
What did you replace the PVA with?
Warner
So, if anyone in the Seattle area needs a bottle of butyl acetate ...
alan