Re: Pictures of your Star Wars

Wasn't there some discussion a while ago about the HV supply contributing
to squiggly lines? Something about with the metal shield off on Tempest you
got squiggles and with it back in place they vanished...

John :-#)#

At 07:46 PM 18/02/2003 -0500, Joel Rosenzweig wrote:

>I made a little bit of progress today. It occured to me to hook up my ZVG
>to the Amplifone, while running Star Wars to help me determine if the Star
>Wars boardset might actually be at fault. I thought everything looked good
>on the scope, but I realized that the level of detail I was looking for
>might not really show up on a 4"x4" scope display, so I gave the ZVG a try.
>Interestingly enough, the image from the ZVG looks fantastic. All of the
>text is crisp, without a squiggly line to be seen. This would indicate that
>the Star Wars boardset itself is generating noisy data. So, I need to go
>back to the scope to see if I look carefully enough, whether or not the
>noise is visible in the output. On the surface it would appear that the
>problem really is with the boardset, but I'd like to see confirmation on the
>scope.
>
>Given the nature of the problem as it looks now, it sounds more and more
>like bad capacitors on the vector generator board somewhere after the dacs.
>If someone has a good candidate, send it along. I'll get out the schematics
>and give it my best shot, too. Any other ideas are welcome!
>
>Joel-
>
>
>----- Original Message -----
>From: Joel Rosenzweig <joel.rosenzweig@verizon.net>
>To: <vectorlist@synthcom.com>
>Sent: Tuesday, February 18, 2003 3:51 PM
>Subject: Re: VECTOR: Pictures of your Star Wars
>
>
> > I have taken a few pictures of my Star Wars video display and have posted
> > them here:
> >
> > http://members.bellatlantic.net/~vze25r6t/starwars.html
> >
> > Thanks for all the feedback so far. I hope that the pictures will help
> > explain just what I mean by "squiggly" lines.
> >
> > I ran the self test and learned that my X-BIP needs adjustment. The
> > individual vertical lines in the BIP test are visible and are spread about
> > 1/4 inch wide, total. The horizontal line is at least solid, but is about
> > 1/8 inch wide.
> >
> > I did try exercising the X and Y size pots on the deflection board. I
> > haven't found a sweet spot yet that removes the curves in the lines. I'm
> > hopeful that the BIP alignment will help the text somewhat, but other than
> > that, I've got some work to do.
> >
> > So, any ideas of where to look after that will be most appreciated!
> >
> > Thank you,
> > Joel-
> >
> >
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Received on Tue Feb 18 21:02:16 2003