ORIGINAL: Sky High
Aren't CBs on the AM band and DFs on the FM band?
CB radios are AM and around 27 MHz...And you're right that DFs are FM, and at a higher frequency (around 72 MHz, at least in the US). The difference in modulation type doesn't change the the potential for interference, though, or outright blocking due to the higher power allowed for CBs (up to 5 watts). However, the frequencies are well separated. But that doesn't mean hits can't occur due to things like harmonics, etc., especially if power levels are high.
(Disclaimer: I'm not a radio expert. I've picked up a few useful tidbits along the way, but that's it.)
Will