RetroTINK COMP2RGB YPbPr to RGBs Transcoder

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BigSplodge
Posts: 9
Joined: Tue Jun 09, 2020 10:42 pm

Re: RetroTINK COMP2RGB YPbPr to RGBs Transcoder

Post by BigSplodge »

BigSplodge wrote:Hi Guys, first post here, long time lurker.

I recently picked up one of these COMP2RGB devices but colours look noticeably "off" on my Consumer Trinitron CRT on both my PAL Nintendo Wii (480i, with official component cables) and NTSC Gamecube (480i, with official component cables). The Wii looks great in 480i RGB (using a CSYNC RGB scart cable from RGC) on the same display. The same applies to the Gamecube, when combining the same RGC scart cable with an Eon MKii and output set to RGB.

RGB scart (good):
https://imgur.com/X6vmQGb
https://imgur.com/jqWUqc7

COMP2RGB (bad):
https://imgur.com/u3NSolx
https://imgur.com/6LaseaL

It appears that the colour conversion to RGB from component is causing issues here, with the Reds and Blues particularly under-saturated.

Any thoughts?
So it appears to be an oddity with the way some EU consumer Trinitrons handle the sync signal the COMP2RGB puts out. No such issues with 75ohm CSYNC direct from my SFC Jr., PAL Wii, NTSC N64 & NTSC GC (GCHD Mkii) but whatever sync signal the COMP2RGB puts out, neither of my CRTs like.

Interestingly - enabling sync regeneration on my GSCARTSW seems to resolve the colour issue completely (though it seems to introduce some horizontal stability issues). Presumably, enabling sync regeneration when it's not actually required for any of my scart devices is undesirable?
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