Auto RF switches don't work well on older RF systems like Atari because they don't send enough voltage down the RF cable to trip the auto RF box. For modern uses, RCA cable + RCA to coax adapter is the most convenient option. The only disadvantage is there's no daisy-chaining available. The Atari will have to go on the end of your RF chain if you have one.
Glad to hear your 2600 Jr. works though! Thanks for the rep.![]()
Interestingly enough, my Atari 7800's RF signal can go through at least 3 auto RF switches. I'm also using a really thick RCA cable, that probably helps.





























