[TenTec] Interfacing David Clark Headset mic to Omni 6

[Bill Coleman AA4LR]

On 9/13/97 10:45 AM, Thomas M. Delker at k1ky@bellsouth.net wrote:

>Has anyone interfaced aviation headsets requiring power to the mic to an
>Omni 6 or related radio??  Seems the mic element will need power as it
>is the amplified type.  
>
>I have a David Clark model with amplified mic element.

The problem with all aviation headset is *NOT* that they are amplified. 
Aviation headsets used to be all carbon microphones, which require a bias 
current in order to work. All subsequent headsets are been designed to be 
compatable, whether they use carbon microphones or not.

Tie the one microphone lead to +12 through a 2.2 kiloohm resistor. Tap 
off the audio using a capacitor of around 1 uF. That should do it.



Bill Coleman, AA4LR, PP-ASEL        Mail: aa4lr@radio.org
Quote: "Not in a thousand years will man ever fly!"
            -- Wilbur Wright, 1901


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