[miniman82]

This is definitely not something with the video (luma), it's something with the chroma section of my CTC-4. The set works fine with low levels of color but when I advance the color control to where I think it's pleasing, it gets 'grainy' for lack of a better word. It looks like noise, travelling horizontally through the frame. At first I though maybe the chroma section was being overdriven, so I suspected auto chroma gain issues. I did find a drifted resistor (a 3.9k which read 4.3k) going to the 6AZ8 bandpass amp tube's grid (pin 6), but it didn't improve things any. What else can cause this?