[Coco] Cross Post from the Facebook Page about the RGB2VGA Board

[John B]

Steve,

Are you referring to Luis' RGB2VGA board?  The reason I ask is I literally
(15 min ago) just finished assmebling my board.  I used the resistors he
outlined on his page under the "Modifications" section.
https://sites.google.com/site/tandycocoloco/rgb2vga  Are those the
resistors that produced the video jitter?  If so, can you give us the new
values that fixed the issue?

Thanks,

John

On Thu, Jul 9, 2015 at 11:45 PM, Steve Batson <steve at batsonphotography.com>
wrote:

> I figured I'd post the following here too. Some discussion occurred on the
> FB page, but a lot of discussion was done between Roger and Myself in email
> as Roger made several discoveries that stabilized some very annoying jitter
> problems with video.
>
> RGB2VGA Stabilized!
> First thanks to Felipe for a very cool Solution to bring the CoCo3 video
> to Modern VGA Monitors. Originally, I missed a few resistors that I somehow
> thought were optional and Felipe straightened me out on those.
> Then I was getting Jitter just like Roger was experiencing. I had several
> email discussions with Roger as he was doing some research and
> experimenting based on what he found about the VGA standards and found that
> changing some resistor values stabilized the output from his board. I have
> pretty much duplicated Roger's resistor values on my board with the
> exception of 4 that I'm waiting to come in, but mine is crisp and jitter is
> gone. I will most likely change those 4 resistors when the parts come in
> unless it doesn't make sense.
> Anyway, Finally fantastic output on my VGA monitor. Very Cool!!!
> Very Big thanks to Roger!!!
>
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