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NEC TG-16/TE/TurboDuo => TG/PCE Repair/Mod Discussion => Topic started by: SuperPlay on July 10, 2010, 09:41:02 PM

Title: Which RGB amp
Post by: SuperPlay on July 10, 2010, 09:41:02 PM

Looking around on the web there seems to be 2 popular ways to add an RGB amp to a PC Engine.

The first is the one posted on Gamesx

http://www.gamesx.com/grafx/pce_rgb.jpg (http://gamesx.com/grafx/pce_rgb.jpg)

and the second on Mmonkey

http://www.mmmonkey.co.uk/console/pce/amp.htm


Does the Mmonkey one without the caps etc work as well as the Gamesx one?  comments please.

Title: Re: Which RGB amp
Post by: Ravij on July 18, 2010, 05:50:51 AM

I've not built either, but IMO the GamesSX one looks like a proper amp circuit. I like the MMMonkey site,  but that amp looks too crude, having no voltage clamping.

http://en.wikipedia.org/wiki/Clamp_%28circuit%29#Clamping_for_input_protection (http://en.wikipedia.org/wiki/Clamp_(circuit)#Clamping_for_input_protection)

It may well work fine, but I wouldn't want to blow my PC Engine Graphics chip just to save a few cents!

Title: Re: Which RGB amp
Post by: SuperPlay on July 19, 2010, 07:36:56 AM

Thank you very much for your reply and the additional information.