PCE RGB mod, disappointing results

[city41]

Like blue said, or you can just order my component video mod and get an amazing results:)

Your mod is really awesome. I totally would go that route, but I've already committed to RGB'ing up all my consoles.

[turbokon]

Does the pvm accepts component video? I never own a pvm before.

[BlueBMW]

Some PVMs do accept component video in addition to RGB, Svideo and composite.

[CGQuarterly]

The one city is using does.  My friend has the same model.  I have the BVM-20F1U, and it does, as well.

[Tatsujin]

I'm not trying to give you attitude, but you did the mod without the amp, then complained about the picture quality.  Then I pointed out that you didn't make the amp, someone else agreed, and you said "well, I guess you guys don't know the answers to my questions."  I don't care what that page says on GamesX.  Build the amp.  I've never seen a TG16/PCE RGB mod done without one.  Then, if you still have problems, we can hopefully help you troubleshoot them.  And to answer your sync question, it should make no difference.  I've tried switching from raw sync to composite video as sync, and I see no difference at all.

QFT!!

[city41]

I built the amp tonight. Well, I built an amp anyway. Not the most common one for the PCE, but rather this simpler one. Works great! I'm getting a nice bright picture now. Dungeon Explorer now looks, well, as good as it can anyway heh.



Just temporarily hooked it up in the Tennokoe. I'm not going forward with the Tennokoe, it was just a convenient place to try this out. I'm going to mount it in my Turbo.

[CGQuarterly]

I've built that amp before, then replaced it with an IC-based amp later on while troubleshooting a problem.  I didn't notice a difference between the two. 

Glad to see that you got it working to your satisfaction!

[NightWolve]

gamesx mentions that the amp is not necessary:

If you can get the parts and have the ability to assemble this amp, you won't regret it. For most monitors it's not necessary, though as mentioned above some won't sync without it. If you use an upscan convertor like the XRGB-2 you'll have a very acceptable image without the amp.

http://www.gamesx.com/rgbadd/duorgb.php

I guess you guys don't know the answers to my questions then. Thanks anyway. I'll add the amp and see what I get from there.

Hm, I never noticed that (looks like they updated that page too, looks much better!), but it's terrible, lazy advice to just hook the pins straight from the chip to the TV/monitor and that goes for any other console unless you know the signal was properly prepared for TV/monitor output/usage and can handle the load... The DC offset (as ApolloBoy mentioned) on the RGB pins is like 4.66 Volts and that 220 uF capacitor on the output in the full Japanese amp circuit filters that out. Also, the transistor works in a way where the signal behind it isn't attenuated at all when you plug it into a 75 Ohm load (TV/monitor or video converter device), though this doesn't quite matter with the 6260 chip so other video signals (Luma/Composite) don't get attenuated if plugged in at the same time. Anyway, those are good things to do or have, in other words. You wanna both protect the chip and prepare a proper, independent signal for the TV/monitor to process (thesteve could better explain, but yeah!).