KMIK & KBLA (if I remember their call correctly) AFAIK are the two geographically closest co-channel stations to each other that are both licensed to use 50kW at night.
Anyone know of any that are closer to each other, are co-channel, and are both authorized with 50kW at night, in the USA?
In San Diego, I usually can hear, although somewhat faint (using the select-a-tenna helps immensely), KBLA in the daytime. KMIK booms in like a local at night. Sometimes the only stations that have a stronger signal at my QTH are KFMB and KSDO. Also, sometimes in the winter months I've been able to hear KMIK in the daytime - I've even heard it drown out KBLA around noon on occasion!
FWIW they have a preset on my portable radio.