Hello!
What isn't quite clear for me (as an even more amateurish amateur :-)) is where exactly - in the schematic, not on the board, the latter is clear - you tapped the signals for color and sound (in contrast to the PAL schematics, the hand-drawn NTSC 4-switch schematic on this site doesn't show the part numbers, and the FAQ only refers to "top of C210/R210" and "bottom of R206/C208" here, just these part numbers don't exist in the Jr.). And, though is pretty obvious that you tapped TIA csyn on top of R51, TIA lum0 on top of R52, TIA lum1 on top of R49, I cannot find a pin labelled "lum2" on this site's PAL VCS Jr. schematics - you tapped the pin labelled "lum3" on top of R53 instead and this gives the same result?
I'd like to try this mod on a 6-switch NTSC console and thus cannot get color and audio from the same spots of the mainboard, that's why I'm asking: are there any resistors/capacitors/anything else between the TIA pins and the tapping points?
Thorsten