[rescue] Sun 21" CRTs (was: Feedback on Sun 24" LCD?)

Robert Darlington rdarlington at gmail.com
Mon Jul 7 16:36:26 CDT 2008

I bet that's the problem I'm having (and sorry to hijack the thread).
Next time I dig the thing out of storage I'll fix up the tube
grounding system and check for loose things.  I design tube based
amplifiers for industrial applications so I'm used to working around


On Mon, Jul 7, 2008 at 3:20 PM, Mike Loewen <mloewen at cpumagic.scol.pa.us> wrote:
> On Mon, 7 Jul 2008, Robert Darlington wrote:
>> Hey, my NeXT color monitor does something similar.  It ticks or
>> something, the picture jumps a little bit, and then it's fine again
>> for a couple of minutes.   My guess is something is arcing over, but
>> don't know enough about how these things are built to know for sure.
>> Any ideas?
>   We used to see that on the 19" round CRTs on the Air Force AN/FYQ-93
> system.  As I recall, it was a static buildup on the protective glass plate
> in front of the CRT.  The plate was supposed to be grounded by a wire, but
> if the wire broke it would periodically discharge as you described.
> Mike Loewen                             mloewen at cpumagic.scol.pa.us
> The B9 Robot Builders Club B9-0014
>  http://sturgeon.css.psu.edu/~mloewen/B9/
> Old Technology  http://sturgeon.css.psu.edu/~mloewen/Oldtech/
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