Without a bit more detail than that no one is going to be able to tell you what it is. Also, I assume you mean 14.890 MHz to 14.910 MHz, not kHz. That is 20 kHz wide, not 30 kHz.
Now, 20 kHz of BW in that range might possibly be the PLUTO II OTHR out of Akrotiri. But it does not stay on one frequency, it moves around to use propagation to illuminate the desired search/target area.