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Monoplane Communication


MarkM

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Hi MarkM

 

Can you check the craft first?

 

There are two common systems

>1- NATO plug (U-174) which is a stubby 4 connection jack
>    on which the headphone feed is connected as follows
>    First ring back from tip of plug is 2 and is live
>   Third (rear) ring back from tip is 4 and is earth
>
>2 - Two jack  general aviation system which uses:
>     Standard 1/4" mono jack for headphone circuit (M642/4-1)

 

These are fairly hot signals so an unbalanced pad will be needed to

feed into a microphone input.
 

 

mike

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