US Army HS-30 Headphones (US Army Koptelefoon HS-30)

This headset has been used by many U.S. radiosets. Because of the small size, it was also found suitable for use with a helmet. The thin metal bracket and the small receivers provided a lightweight set. The sensitivity is great, the rubber earshells avoid hearing backgroundnoise . Furthermore, the sound transfer is so well that a sudden loud noise almost rip your eardrums Notes High impedance headset, built-in matching transformer; PL-55 1/4 inch phone plug. M-300 rubber inserts. Used with SCR-211 Frequency Meters, RC-261 Remote Control Equipment, etc. Technical Manuals TM11-300, TM11-2632