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Subject: Re: Removing PVA from a CRT
When we fixed the VR14 at the RICM, we were concerned about the safety
aspects of removing the PVA and just using double-sided tape to hold the
outer glass in place. We bought a thin sheet of Lexan at Home Depot, put
the outer glass on a cookie sheet
On Nov 19, 2018, at 7:28 PM, Alan Perry wrote:
> In the video that I looked at, the guy cut 8 1/8" pieces of double-sided foam
> tape, three each along the top and bottom and one on each side, then sealed
> it with clear packing tape. It seemed to me that using some optically clear
>
> On Nov 19, 2018, at 4:01 PM, Alan Perry via cctech
> wrote:
>
>
>
> On 11/19/18 12:18 PM, Warner Losh wrote:
>>
>>
>> ...
>>
>> I have a VR201 that's like this myself, and I've been too scared to try to
>> fix it. Instead, I've tried bodging together various hacks to try to get the
On Mon, Nov 19, 2018 at 11:41 AM Alan Perry via cctech <
cctech@classiccmp.org> wrote:
>
> I recently picked up a Rainbow 100. The PVA between the safety glass and
> the CRT on VR201 that came with it has broken down and failed badly.
>
> I have seen videos and read about removing the safety
Those retrace lines are likely an artifact of the brightness control being
set too high. It's pretty typical with older monochrome TV sets. It also
looks like there's insufficient vertical sweep, probably due to old
capacitors.
On a CRT that small, I wouldn't be concerned about direct fitting the
On Mon, Nov 19, 2018 at 10:41 AM Alan Perry via cctech
wrote:
>
> Also, I have never worked on a CRT before. I am trying to find a local person
> who can observe me and stop me from doing something stupid. If I can’t find
> someone, what am I more likely to do wrong? How can I be sure I
In the video that I looked at, the guy cut 8 1/8" pieces of double-sided
foam tape, three each along the top and bottom and one on each side,
then sealed it with clear packing tape. It seemed to me that using some
optically clear adhesive sheet would accomplish both jobs.
I have some heat
On 11/19/18 1:48 PM, Paul Koning wrote:
On Nov 19, 2018, at 4:01 PM, Alan Perry via cctech
wrote:
Finally, a VR201 specific question. I booted the Rainbow over the
weekend and, looking through broken-down PVA, I could see the
Rainbow has booted and I could enter DOS
On 11/19/18 12:18 PM, Warner Losh wrote:
On Mon, Nov 19, 2018 at 11:41 AM Alan Perry via cctech
mailto:cctech@classiccmp.org>> wrote:
I recently picked up a Rainbow 100. The PVA between the safety
glass and the CRT on VR201 that came with it has broken down and
failed badly.
I recently picked up a Rainbow 100. The PVA between the safety glass and the
CRT on VR201 that came with it has broken down and failed badly.
I have seen videos and read about removing the safety glass, cleaning out the
PVA, and reattaching and resealing the safety glass.
All that I have
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