MILITARY HF MANPACK COLLAPSIBLE 5 ELEMENT WHIP ANTENNA 6.30 ft 192 cm
The base has a male 3/8" (10mm) thread that is common with many ham radio and CB antennas. The US Army (& others) used this antenna with HF & VHF military transceivers including AN/PRC-8, AN/PRC-9, AN/PRC-10, AN/PRC-25, AN/PRC-77 & AN/PRC-104.