Diffrence in Color and Brightness output between consoles.

[coliver80]

I've done homemade av mods to 4 systems.. 2 woodies.. a darth vader and a jr. The juniors color is so much more vibrant and bright then the 4 switch models.. is this just by chance or is there a reason for this.. and even better question is there a way to make the 4 switch output more like the jr. Ive already tried adjusting the pot.. that simply changes color.. doesn't effect saturation or brightness..

[coliver80]

Answered my own question.. did some reading at it seems that after rev 16 Atari put a 820 ohm res. between legs 6 and 9 of the Tia chip to improve color. Tried it my self and greatly improved the color of my rev 14 board.

[+DrVenkman]

Answered my own question.. did some reading at it seems that after rev 16 Atari put a 820 ohm res. between legs 6 and 9 of the Tia chip to improve color. Tried it my self and greatly improved the color of my rev 14 board.

Yes, that's documented in the Atari VCS Domestic Field Service Manual. I did that mod to my Rev 14 "daily driver" Woody some months ago and even posted a thread when I did it. It's a nice, quick little fix. Rev 16 boards are where this fix was added into the design at the factory. My Rev 16 Vader, though unsocketed and thus a PITA to replace chips, has excellent color saturation. Edited July 15, 2016 by DrVenkman