Who are these guys? They are associated with WIPE, the new HF station in Alpine, NJ, and seem to be connected with the station in Matavia, IL.
A google search on them pops up a lot of stuff.
Also look at the FCC page for items associated with them. The latest posting includes the
following as operating frequencies:
9.650 MHz
11.850 MHz
13.720 MHz
15.450 MHz
https://fcc.report/IBFS/Filing-List/IHF-LIC