Many thanks to SWLing Post contributor, Matt Todd, who shares the following recording and notes:

Audio recording of a MARS (Military Auxiliary Radio Service) of the establishment of a phone patch between a service member and their family member. This was recorded January 24, 2022 at 2148UTC on 13.927 MHz. It was recorded with an SRDplay RSPdx using a wire loop antenna.

Broadcaster: MARS

Date of recording: 1/24/2022

Starting time: 2148

Frequency: 13927

RX location: Hugo, MN

Receiver and antenna: SDRplay RSPdx with wire loop around perimeter of attic

Mode: Single Side Band