SNES connected to RGB arcade monitor, what is wrong with this?

[Tighe]

Can you tell me what the issue is?  Do I need an RGB amp to get a better picture?  It is clear, for very dim.

[Tighe]

Would using these transistors amp the signal enough to get a better picture?

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

[Tighe]

Bump, anyone have advice?

[133MHz]

What kind of cable are you using to connect the SNES to the arcade monitor? Official PAL SNES SCART cable? Third party Gamecube SCART cable? Direct wiring?

[Tighe]

What kind of cable are you using to connect the SNES to the arcade monitor? Official PAL SNES SCART cable? Third party Gamecube SCART cable? Direct wiring?

JAMMA direct connected:

[RGB32E]

Two things:

1. You need to add 220uF series caps on the RGB lines, positive side to the console, negative towards the monitor.

2. http://shmups.system11.org/viewtopic.php?f=6&t=28069 - I haven't used one of these, but based off of the feedback this is seems to be the definitive solution for connecting non-JAMMA RGB to an arcade monitor.  Alternatively, you could try building your own circuit with a ths7315 (14.5 db gain).

[Tighe]

Two things:

1. You need to add 220uF series caps on the RGB lines, positive side to the console, negative towards the monitor.

2. http://shmups.system11.org/viewtopic.php?f=6&t=28069 - I haven't used one of these, but based off of the feedback this is seems to be the definitive solution for connecting non-JAMMA RGB to an arcade monitor.  Alternatively, you could try building your own circuit with a ths7315 (14.5 db gain).

I will give it a try, I had only one 220 uf on me so I put it on the red output and it didn't change the picture at all.  I will try it on all 3 now that I picked up some more.

Also, I made up this RGB amp circuit using off the shelf parts from Radio Shack, do you think it will work?  Every RGB amp I see here uses ICs.  This one only uses transistors.  It is a modified version of a composite video amp circuit I used in my portable NES.