Best C-Sync Mod on PC Engine Duo-R

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jamisonia
Posts: 80
Joined: Thu Jan 23, 2014 3:57 pm

Best C-Sync Mod on PC Engine Duo-R

Post by jamisonia »

I currently have my PC Engine Duo-R RGB modded using the THS amp, but I tied composite video for the c-sync. I'd like to go back and redo it to include c-sync instead. I'm wondering what the best mod for adding c-sync is?
kamiboy
Posts: 2000
Joined: Sat Sep 04, 2010 4:40 pm
Location: Denmark

Re: Best C-Sync Mod on PC Engine Duo-R

Post by kamiboy »

Grab sync from the HU GPU chip and boost using the transistor amp circuit available online. Though boosting is optional depending on your display.
jamisonia
Posts: 80
Joined: Thu Jan 23, 2014 3:57 pm

Re: Best C-Sync Mod on PC Engine Duo-R

Post by jamisonia »

Double post
Last edited by jamisonia on Thu Sep 24, 2015 2:27 pm, edited 1 time in total.
jamisonia
Posts: 80
Joined: Thu Jan 23, 2014 3:57 pm

Re: Best C-Sync Mod on PC Engine Duo-R

Post by jamisonia »

I'm using the XRGB Mini, I'm just wanting to get the cleanest sync possible and do the mod "right" or as best I can.
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RGB32E
Posts: 1400
Joined: Thu Nov 05, 2009 12:50 am

Re: Best C-Sync Mod on PC Engine Duo-R

Post by RGB32E »

Contact Tim Worthington and request an order of his AV-DRIVER. It has a CSYNC buffer specifically designed for the CSYNC output from the Hu6260, and proper RGB buffering for the RGB output from the Hu6260. The RGB output from a THS 6db amp like the one you're using outputs too high of a video signal. The AV-DRIVER addresses this issue with solder jumpers for setting the correct level of amplification and provides AC-biased input operation so that you don't crush darker colors due to the high DC offset from the Hu6260 on the RGB lines.

http://shmups.system11.org/viewtopic.ph ... r#p1069493

http://www.etim.net.au/
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ksdominant
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Joined: Wed Oct 14, 2015 10:04 am

Re: Best C-Sync Mod on PC Engine Duo-R

Post by ksdominant »

Awesome,

Thanks RGB32E I've contacted Tim via his website.
Thanks again. :D
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