At the risk of mentioning something that's been mentioned and/or checked by you before...
I believe you said that linking to the sites is not terrestrial RF but wireline and satellite. Be sure that there isn't some RF linking that's been "fogotten" by someone not very familiar with the entire system. I've seen 72 mc. link transmitters transmit spurs just like any defective transmitter can. The way this spur wanders around sure sounds like a dirty transmitter. Puzzling thing is that you've said that the bearings to the "spurs" while DFing wander all over the place. I would doubt there's more than one spur generator, so, point is, make sure your DFing person is an experienced Foxhunter and knows how to handle multipath, one of the biggest *spoilers* for any Foxhunter. You said you sat near one of the sites but the interfering signal was weak, or non-existent. Have you done the same at the other two sites? Good luck finding this beast! Laryn K8TVZ
