RGB amp (VGA to JAMMA)

[RealMFnG]

Just missing a resistor before I can solder the rest of the components and then I can give this thing a whirl.

 

[RealMFnG]

Welp, some success.

I am powering the amp via USB and plugging it into a laptop. Using a Dreamcast and a DC2VGA adapter, I am able to get it working with RGBHV. So the passive sync combiner works. But switching over to RGBS craps out. The image isn't the kind that just flips vertically. It is completely distorted.

@invzim, do I need to terminate the Csync signal with a 470r resistor? The PCB looks like this right now:

 

[RealMFnG]

Might be how I setup my DC2VGA. I used the resistors for SCART-safe sync levels

 

[Sp33dFr34k]

Congrats man, that looks pretty nice!

 

[RealMFnG]

Congrats man, that looks pretty nice!

I'll see if I can remove the resistors on the DC2VGA and put on the resistors for the Common attenuated sync levels. If that works, I'll put the post the gerber for the PCB.

 

[JohnRambo'sKnife]

Does this work with 24khz output from JVS systems?

 

[RealMFnG]

Does this work with 24khz output from JVS systems?

It should. The amp is the same that is in the JAMMAizer. Arthrimus demonstrated he amped 31khz using JAMMAizer just fine.

 

[GecKoTDF]

I'll see if I can remove the resistors on the DC2VGA and put on the resistors for the Common attenuated sync levels. If that works, I'll put the post the gerber for the PCB.

Hi RealMFnG, I wanted to ask you if you were ever able to upload the schematic of the final circuit
Thank you very much!