One of my favorite mods to do is restoring RGB and S-Video capabilities to the NTSC SNES Jr. (which is a cost-reduced version of the “one-chip” SNES) using voultar’s mod.
What I want to know is this: why can I use a cheap-ass friction-welded Aliexpress SNES multiout RGB NTSC SCART cable (EXAMPLE ONLY, I DID NOT BUY FROM THIS PERSON) to connect my voultar mod SNES Jr. to the OSSC, and I have a PERFECT PICTURE on my HDTV, when, alternatively, I use the console5 mod with the same cable and OSSC and I have sync issues (sometimes a distorted signal, sometimes “No compatible signal” black screen from my HDTV)?
Voultar uses a better video amp than most of his competitors, mainly because with the THS7374 you can disable the LPF, while most competitors use the THS7314/7316 video amp with the LPF permanently enabled. But this should not impact sync, should it?
Someone explain why I can use stupidly cheap cables on voultars SNES RGB mod but not other’s mods.
Voultar has claimed that the mod sold by console5 is stolen from his design, so I would think it would work the same, though the mods I see on their respective sites look rather different on their face, with Voultar selling two separate mods for SNES and N64 while console5 sells a combined SNES/N64 mod. As far as the components and functionality, I’m pretty clueless. It looks like sync on the console5 mod is straight off the SNES optionally attenuated through a resistor, I suppose to adjust it for 75 Ohm termination instead of TTL level sync? While Voultar’s description says his mod automatically adjusts for 75 Ohm or TTL based on the cable you use, which sounds like some black magic to me.
Maybe that black magic is what makes it work with your cable. The obvious question with the console5 mod would be whether you’ve set the TTL jumper to be compatible with your cable. But how do you even know with some random cheap cable where it’s getting sync and (if getting it from CSYNC) whether it expects TTL or not? If the cable syncs on luma or composite, then the CSYNC signal would be irrelevant.