Regarding the potential brightness fluctuation issue from the THS-series amp use, I feel that the SCART cables might have some hand in adding weight to that too. Doubtful, anyone is going to want to dissect their consoles to remove the coupling capacitors (if any and depending on the console). For the PS1/2/3 (and maybe the Dreamcast?), I have two SCART cables each. One where I left the coupling capacitors intact and one where I removed those capacitors. I'll test them both out and see what the results shall be.
Also for MAME application, I will rig something up. Want to demonstrate the inferior contrast that is produced by the J-Pac's amp (
MAX4386EMAX4386E). I really feel the THS-series amps do a better job of amping RGB than the IC that the J-Pac uses.
Question on how you came to derive the measurements for both the MC Cthulu PCB and JAMMAizer: Did you just put in the sweat equity with digital calipers to get the measurements? Or did you get your hands on the schematics somehow? Seems so precise.