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Microair 760 Radio - High pitch tone


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G’day Radio Guru’s,

 

I have a Microair 760 Radio fitted to a gyro which is working fine with a Lynx Intercom system. 
 

I do however get an annoying momentary (1 second) loud high pitched tone through the headset the moment I turn the radio on. After which it goes away and the radio functions fine.

 

Is this normal? And for comparison, are there any Microair 760 owners here that experience the same thing?

 

thanks in advance!

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sounds like the mic is feeding back through the intercom  / sidetone facility .

turn down the sidetone, or mic gain, or intercom tweaks.

is the volume of the squeal track with the volume control on the panel ?

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5 hours ago, FlyBoy1960 said:

Could also be rf getting in the line,  disconnect the mic plug and test again, noise gone, problem solved.  Still there, try above.

Hey Flyboy, many thanks for the tips! I’ll try that out.

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