Help with small video switching project.

[Bradley]

Hi guys just here for beginner advice. I don't have much electronics experience but have built a few small circuits successfully for my RC plane hobby.

I am trying to build an RSSI comparator for video switching. Please see attached circuit diagram.

The first op-amp buffers and scales the RSSI. The second is the comparator.

I am able to manually switch video signals just fine with the switch. My problem is that the MAX4547 requires a signal much closer to the supply voltage than what the LM358 outputs and is stuck on the low signal channel no matter the output. (peaks ~10V)

Is their an opportunity to add an pull up resistor here or should I start again?

Any help appreciated thanks.

-Brad