US Army National Guard with voice and MIL 110 msg traffic.
01:31 UTC - C/S Q217 and Q219 with voice and MIL 110 msg traffic; followed by "I spell LPKOX";
01:36 UTC - C/S Q211 calling UNID;
01:39 UTC - C/S Q277 "I spell HLGHX";
01:40 UTC - "I authenticate UNIFORM";
01:41 UTC - C/S Q219 calling Q227;
01:43 UTC - Q219 "authenticate DN"
US Army National Guard Nationwide (USB/ALE) frequency confirmed from an old edition of Monitoring Times Hot 1000 HF Frequencies
RSPduo | Barker & Williamson antenna | Toronto, Ontario Canada