*** UPDATE *** In this video I noted issues I had with some "color sparkles" throughout the background while playing Pitfall and Ms. Pac-Man on the Atari 800XL. With great help from 2 members (Eric & Brad) on the FB Group, Vintage Television Collectors, I was told it looks to be interference from a switching power supply. Sure enough, I was able to confirm it was my new USB-C power adapter while having video out from the RF. The USB-C power adapter appears to be fine if I use the 5-pin DIN connector for video out on monitors and TVs.
*** UPDATE *** In this video I noted issues I had with some "color sparkles" throughout the background while playing Pitfall and Ms. Pac-Man on the Atari 800XL. With great help from 2 members (Eric & Brad) on the FB Group, Vintage Television Collectors, I was told it looks to be interference from a switching power supply. Sure enough, I was able to confirm it was my new USB-C power adapter while having video out from the RF. The USB-C power adapter appears to be fine if I use the 5-pin DIN connector for video out on monitors and TVs.