H-250 Handset Microphone Receiver with 5 Pin Connector Assembly, Pack of 2 I9683

Noise Canceling mikes on back and end Volume Control Ear Bud (VCEB) note: the H-250 needs to be clipped in a location relativity close the the ear where the ear bud will be used since the ear bud cord is not that long. General Information This dynamic noise canceling mike type handset is the standard for many PRC-nnn series radios. The noise canceling is accomplished by two design features: The diaphragm is stiffer than a normal microphone like the H-189 (non noise canceling) (taping the holes on the back will not make much improvement), There are holes behind the diaphragm so sound arrives from both sides. IMPORTANT - Many people don't realize how good the noise canceling feature is. They hold the mike 1/2 to 1-1/2" from their mouth, then complain that the handset has low output or that the radio has weak modulation. That's because of the noise canceling. YOU MUST HAVE THE MIKE TOUCHING YOUR LIP! This handset was designed for use under combat conditions which includes explosions, heavy trucks or tanks driving nearby, etc. Label on Handset: Handset H-250/U Sonetronics Contract DAAB07-87-C-T017 U.S. Intended Use Handset H-250()/U utilizes a 1000 Ohm earphone element, a 150 ohm dynamic noise canceling microphone, a push-to-talk switch and a six foot (extended) retractile cord terminating in a 5 pin audio connector (U-182/U). It is intended for uee with military man-pack radio equipment such as the AN/PRC-70 and AN/PRC-77. Handset H-250()/U can be uesd in place of Handset H-189/GR. The H-250( )/U handset assembly is a disposable item. Left to Right H-207 A/VRC Sonetronics H-189/GR 98230, ON273827, Sonetronics (See: KY-68 secure telephone) H-350/U Electro-Voice Inc. M-80/U sonetronics NSNs H-250/U 5965-00-043-3463 5965-01-247-4723 H-250/VCEB