Have you heard any activity on 11 meters? I don't remember what kind of antenna you said you were using. With my 5/8 wave maco and my BMT shockwave I can listen to any HF band...both are deaf on 6 meters and up. The matching device in some antennas won't allow you to receive certain bands very well. Do you have any tuners or filters inline that could be filtering out the frequencies you're trying to listen to?
For RX you could toss a long wire over some trees and try that. A long extension cord, alligator clip and some old coax of any kind can be used for a cheap test.
For RX you could toss a long wire over some trees and try that. A long extension cord, alligator clip and some old coax of any kind can be used for a cheap test.