NavList:

Looking at some photos in online sales literature for the Tecsun radios, I see that there is a jack for an external antenna. I can't tell for sure (and I don't have this radio myself), but it could be an MCX connection? In any case, it looks to have a metal outer ring. With the discussion of long wire antennas, no one has mentioned adding a counter-poise. A counter-poise is an alternative to an earth ground and could be connected to that outer ring at the external antenna jack. Ideal length of the counter-poise is subject to the random or tuned length you chose for the antenna, which band you are trying to get WWV on, and what sort of antenna loading/tuning network they may have implemented in the radio. Try 15-30 ft, or what ever you have handy. If you ran your antenna horizontally, run the counter-poise in the opposite direction. If you ran your antenna vertically, run your counterpoise horizontally (possibly try pointng in the direction of the transmitter and 90 degrees from that). Remember "rabbit ears" on your TV set? Same idea, only bigger.