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From: jws@thumper.mlb.semi.harris.com (James W. Swonger)
Newsgroups: sci.electronics
Subject: Re: Help with electret microphone
Message-ID: <1990Jul30.132740.29769@mlb.semi.harris.com>
Date: 30 Jul 90 13:27:40 GMT
References: <25150001@hp-lsd.COS.HP.COM>
Sender: news@mlb.semi.harris.com
Organization: Harris Semiconductor, Melbourne FL
Lines: 6


 The condenser mic (electret) is usually packaged with a FET gain stage
because of the extremely high impedance (oo) of the electret element.
These assemblies usually have three wires (+, gnd, sig) and run off +3V.
Some will work on 1.5V and some only use 2 wires. Did the headset have a 
battery compartment?