Modding a PAL SNES RGB SCART cable for NTSC

OK cool, thanks. What brands are good for capacitors? Don't want them suddenly exploding on me one day

 

I always go for Nichicon, Panasonic and Nippon Chemi-Con.

 

Okay, thanks! I know I need 220uF capacitors, but what voltage should they be? 10 volts like the ones in my 3rd party Gamecube cable? Also, I notice that cable has 4 capacitors instead of 3, why might this be?

 

One for composite video perhaps?

 

Maybe? Though it seems kinda silly to buy a SCART cable if you're gonna be using composite.

Anyway capacitor voltage, I'm assuming 10 volts is what I need?

 

The video signal is only supposed to be 1-2Vpp, so 10V is stacks.

The composite signal is used for sync, so it needs to be passed through as well.

http://members.optusnet.com.au/eviltim/gamescart/gamescart.htm#snes --- pulled down on the PAL cable, passed directly thru on the NTSC cable.

 

Thanks for that diagram! That's pretty much what I plan to do, stick a 220uF capiactor on the R, G and B wire. I see in that diagram that pin 3 has a different role from the PAL version, as you said. It's composite sync instead of +12V, so what should I do to connect this? Do I need to snip the wire running to pin 3?

 

The resistor array pulls down R G B and composite. So removing that is enough.

Pin8 is av switching. Should work without it, but you just need to change the channel manually

 

It's not a problem that pin 3 won't be connected to where the console is expecting? Cool, I'll just remove that resistor array, add those three capacitors and call it a day AV switching isn't an issue for me, I'm connecting via my SCART to component converter, and I don't think that thing even has channels to change

 

The 12v supply is from the console to the TV, it causes the TV toggle over to SCART RGB automatically when the connected device is powered up. Obviously not applicable in your setup.

When I made my RGB cables, I didn't include any of those voltages, because I'm using the same converter box as you.

 

My capacitors arrived today! Did the mod, and all went well! Was a tight fit, since the capacitors were larger than I was expecting. But anyway, I now have a SCART cable for my NTSC SNESs that doesn't have audio buzz! Thanks for your help guys!