If you do not find wiring diagrams on Google, then the following will probably work. First, determine which pins (connection rings) on the phone plug are the headphone connections. The determine which connections are the microphone connections. If you can find a mating phone jack it will be helpful. The first part is easy. Take any audio signal, i.e., from a portable radio's speaker leads, or similar setup, and place a 0.1uF capacitor in series with the signal high side. Usually the red wire on a speaker (assuming that the wires are colored red and black). You can experimentally determine the headphone connections without risk of damage to the circuit or phones because the capacitor will only couple the ac signal without DC bias if any is present. Use a couple of clip leads (E-Z hooks if you have any) to connect to the phone plug (or wires) to the headset. You will hear the sound in one or both earpieces, depending on the particular model of headset, when you have discovered the proper connection. If you find two connections, where one connection is for the left ear and one for the right ear then the set is stereo and the common will probably be the common for the mike also. The mike situation is a little different because some mikes require a DC bias or excitation voltage and some do not. This may require experimentation. Use a 0.1uF capacitor in this test also. The 0.1uF will typically pass the entire audio spectrum. Connect the capacitor to an audio amplifier input. Connect the earphone common to the amplifier signal common (ground in most cases). If speaking into the mike does not result in transmission to the amplifier speakers then try a 9-volt battery supply to the mike connection to the capacitor on the side connected to the mike. Connect it so the (+) connects to the capacitor and the (-) connects to the signal common. The capacitor may have a positive and negative polar identification. It does not matter how you orient it in this case because it is used as an AC coupling capacitor. By trial and error, this technique should work. It may even be fun. And if you have any markings let me know and I will see if I can find anything in my military archives. Regards, Richard ----- Original Message ----- From: "THE NELSONS" To: Sent: Monday, September 15, 2003 11:10 AM Subject: [OT:]Military Microphone > Does any one here have any idea what it would take to hook the MIC from > a military headset upto the microphone input of a computer. > > Bob Nelson > > > > > > -- > http://www.piclist.com hint: The list server can filter out subtopics > (like ads or off topics) for you. See http://www.piclist.com/#topics -- http://www.piclist.com hint: The PICList is archived three different ways. See http://www.piclist.com/#archives for details.