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Push to Talk intermittent.

billnaz

billnaz

Well Known Member
I'm dealing with an infuriatingly intermittent PTT problem. It only occurs after about an hour of flight. Failure is as if the PTT button is failing, with activation cutting in and out. I've already switched the switches with no change. I suspect a bad ground, but dread the thought of tracking that down. Any ideas from the brain trust on path to follow in trouble shooting?
 
billnaz said:
I'm dealing with an infuriatingly intermittent PTT problem. It only occurs after about an hour of flight. Failure is as if the PTT button is failing, with activation cutting in and out. I've already switched the switches with no change. I suspect a bad ground, but dread the thought of tracking that down. Any ideas from the brain trust on path to follow in trouble shooting?
Click to expand...

Do you have multiple radios in your plane? Does it happen on both radios? What audio panel?

-Marc
 
Possible culprit

Thanks for the tips. I may have found the problem. Seems some dummy omitted the fiber washers from the mic plug installation. Assuming this is the origin, it?s interesting that the paint on the part provided enough insulation for 12 years.
 
billnaz said:
Thanks for the tips. I may have found the problem. Seems some dummy omitted the fiber washers from the mic plug installation. Assuming this is the origin, it?s interesting that the paint on the part provided enough insulation for 12 years.
Click to expand...

The function of the washers is to eliminate potential ground loop noise. It should not affect the PTT function. Check the ground wire.
 
Technically correct is the best kind of correct

Push to talk is supposed to be intermittent :D

- mark
 
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