Recently, we’ve been having trouble with unlicensed operators using the output frequency of the 449.525 for simplex communication.

We tend to hear this most heavily in the early mornings, Mon-Sat, but sporadically in the afternoon and early evening as well. None of us who are monitoring this situation speaks Spanish, so we are unaware of what is being said, but we have yet to hear any call sign being transmitted. We have a suspicion of multiple mobile stations, and a base station.

As best we are able, we have transmitted warnings regarding this operation, but we can’t tell whether any of the operators are hearing us.

We are working on some RDF and triangulation. Here are some images showing an estimated bearing. We will update these images, and this post, as we learn more.

We have a report that the signals are very strong in the area of Faversham Park, 73rd and Ingalls. That is possibly the next location for an RDF trip.

If anyone can assist with RDF, speaking Spanish to communicate with these operators, and/or locating a place of business, please contact us. We would greatly appreciate the help. If you’re on QRZ, there is a discussion thread available.