KA2XUK was originally licensed for testing propagation on the HF bands allocated to the amateur radio service at the 1979 World Administrative Radio Conference. When those bands became available for general amateur use in the United States, the KA2XUK license was modified to specify operation on the 160-190 kc "lowfer" band.
KA2XUK is licensed for 200 watts PEP on SSB, 200 watts of carrier on CW, and 75 watts on narrow-shift RTTY. All powers shown on the license are ERP. The station is being used to test the feasibility of having an amateur radio frequency allocation in the longwave spectrum and it predates the project of the American Radio Relay League to do the same thing.