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GBS control X Sega Model 2 Image with interference

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man1aco

Student
Joined
Apr 10, 2023
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Brazil
I built a GBS control with a GBS8200.

For the common video games, I didn't have any problems, very clean image.

But with the Sega Model 2 I'm getting image interference, horizontal waves the width of 1 finger.

My test was done with a half-meter unshielded RGB cable from the model 2 to the GBS and a standard vga cable from the GBS to the LCD TV

What could improve this?
1. Shorter shielded wire
2. Longer shielded wire leaving the GBS more than 1 meter away from the Model 2
3. Separates the power from the GBS not using the same source as the Model 2 Power suply.

I have no idea if I'll ever find an LCD that's directly compatible with the model 2 on the VGA input.

This LCD TV of mine in direct connection to the VGA port even recognized it with 640x350 EGA, but it was very ugly and blurred the image and it does not allow adjustments, it is a very bad TV using VGA, it has no options to change brightness, contrast or sharpness.
 
Hi! :)

Frankly, forget the old GBS it's crap,:thumbdown: I have the HDMi version it's crap too. :thumbdown:

My brother came to my house on Saturday with his GBS-C, the latest version, the color blue & it's day is night. :saint:

nal-vers-VGA-HDMI-pour-PS2-Playstation-2-Dreamcast.jpg

it's really great, on the other hand it is adminstable with the PC via Wifi.

I'm going to get one. :love:

We tested Atomiswave, Namco System 12, CPS2 with 2X, frankly it's great, especially as a test bench with LCD PC screens :thumbup:
 
Very expensive for Brazilians 92% tax :cursing:

I think for me it's still worth trying to improve the old gbc control that I made with the 8200 + arduino

gbsc.png
 
man1aco said:
Very expensive for Brazilians 92% tax :cursing:

I think for me it's still worth trying to improve the old gbc control that I made with the 8200 + arduino

gbsc.png
Click to expand...
but they are breaking your balls with their shitty customs. :cursing: What did you look at Amazon Brazil ?
 
Using a VGA on the input to move the GBS further away from the Model 2 seems to have helped a bit.

The interference now comes and goes, it is no longer continuous.

I'm going to make a extremely short and shielded adapter to connect the VGA cable to the filter board, the one I'm using has about 15cm unshielded and has resistors, I'm going to put the RGB potentiometers on the GBS board I removed because of the common video games, but the arcades require signal attenuation.
 
After warming up for a few minutes, the new setup practically disappears with the interference in the image.

I suspect it's the fault of the almost 30-year-old electrolytic capacitors, when they heat up they improve a bit.
 
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