chuckwalla

I don't understand how people have trouble connecting old systems to new TVs, unless the system is using a non-standard System-to-TV plug that isn't the RCA-style RF jack. You connect the jack into one of these: https://atariage.com/store/index.php?l=product_detail&p=42 and then you just turn the TV to channel 3. This still works on 'modern' TVs.

AS for the video plexer, isn't it just 'plug cart cable into cartridge slot, power videoplexer, and press but...

....and press the button on the cart you loaded?

I always forget that the Videoplexer plugs into the Atari console via cartridge slot and power supply connector and the 2600 power supply plugs into the Videoplexer. Cool accessory item.