I hear them regularly with a good to average signal. The last time I checked I thought they were running 5kW?
Pay no attention to their broadcast times, especially sign-off. They often run American preachers on a pay-for-play basis after official sign-off.
Another one to look for is Radio Cristal from the DR. 500 watts on 5010, but sometime they're a kHz. or two higher. They're usually weak, but if props are good, they're an easy catch in the early evenings.
Good luck.