As some of you may know, I'm a bit of an RGB nut. 
With this in mind I purchased a vanilla Duo R (unmodded) from our very own briareos_kerensky some months back. It isn't until now that I have gotten around to looking at the best solution to RGB mod it but I thought I would just post my finding here, as well as my latest purchase, for anyone who might be interested in having their PC Engine RGB modified in a manner of which is most technically correct. While the transistor based amp detailed on mmmonkey's site works, people have persued better solutions. The solution using the THS7314 (as used by mmmonkey in his latest N64 guides) seems to be the best so far. People even claim it to look better than the doujindance RGB amp (the infamous guy who restores and mods Duo R) - which sounds good to me!
The nice thing about the solution offered here is that you can also purchase the 8 pin DIN and correct SCART lead to use with the amp from the same guy for practically the cost of parts.
Product can be found here. http://bit.ly/1ASRENa
I stuck in an order yesterday and it came to around ?32. And finally, a few pics - I'll post my own once I've installed the modification in the coming weeks.
These appear to be through a scaling device but they look amazing either way.
Going to combine this with the jailbar fix found here too, really annoyed me when I had my Core Grafx II. http://bit.ly/X1bsOX
With this in mind I purchased a vanilla Duo R (unmodded) from our very own briareos_kerensky some months back. It isn't until now that I have gotten around to looking at the best solution to RGB mod it but I thought I would just post my finding here, as well as my latest purchase, for anyone who might be interested in having their PC Engine RGB modified in a manner of which is most technically correct. While the transistor based amp detailed on mmmonkey's site works, people have persued better solutions. The solution using the THS7314 (as used by mmmonkey in his latest N64 guides) seems to be the best so far. People even claim it to look better than the doujindance RGB amp (the infamous guy who restores and mods Duo R) - which sounds good to me!
The nice thing about the solution offered here is that you can also purchase the 8 pin DIN and correct SCART lead to use with the amp from the same guy for practically the cost of parts.
Product can be found here. http://bit.ly/1ASRENa
I stuck in an order yesterday and it came to around ?32. And finally, a few pics - I'll post my own once I've installed the modification in the coming weeks.
These appear to be through a scaling device but they look amazing either way.
Going to combine this with the jailbar fix found here too, really annoyed me when I had my Core Grafx II. http://bit.ly/X1bsOX
Very nice RGB image on that Duo but it looks a little off due to no scan lines 
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