U.S. Armed Forces Issue
The cotton duck ST-138 electrical equipment harness was designed to allow the PRC-25 radio to be carried on the operator’s back. The radio was supported by a pair of metal braces and fastened to the harness by two retaining straps. Though issuance of the ST-138 continued with the PRC-25's successor; the PRC-77, the metal pack board was used if the radio’s KY-38 encryption device also needed to be carried.
FSN: 5820-892-894