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Head Set Jack shoring out

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emrath(at)comcast.net
Guest

Posted: Mon Oct 20, 2008 3:52 pm Post subject: Head Set Jack shoring out

Bob, 



I received this message from a FBO where I rent planes.  Any idea why this

is even possible?



"When flying Diamond aircraft at Wings of Eagles, headsets MUST be plugged

in BEFORE turning the radios on.  If this procedure is not followed, it

could result in the headset jack shorting out, which renders the jack

inoperative & obviously not being able to communicate effectively.  Your

adherence to this practice will result in a more pleasant flight experience

and less aircraft down time due to maintenance.  Thank you in advance for

your cooperation"



Marty  RV6A Finishing.

Brentwood TN

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nuckolls.bob(at)cox.net
Guest

Posted: Mon Oct 20, 2008 7:19 pm Post subject: Head Set Jack shoring out

At 06:49 PM 10/20/2008 -0500, you wrote:

 	  Quote: 	
		  



Bob,



I received this message from a FBO where I rent planes.  Any idea why this

is even possible?



"When flying Diamond aircraft at Wings of Eagles, headsets MUST be plugged

in BEFORE turning the radios on.  If this procedure is not followed, it

could result in the headset jack shorting out, which renders the jack

inoperative & obviously not being able to communicate effectively.  Your

adherence to this practice will result in a more pleasant flight experience

and less aircraft down time due to maintenance.  Thank you in advance for

your cooperation"


	


   I am unaware of the physics that might justify such a protocol.

   It is true that for stereo headphones and depending on the

   design of the jack, right and left channels can be momentarily

   shorted together but I'm betting these are not stereo headset

   installations . . . and even so, momentary shorts between channels

   shouldn't be big deal.



   I've never encountered a microphone or headset installation

   where engaging or disengaging the connector while the radios

   are ON presents any kind of risk to the equipment. It would

   be interesting to talk to the technicians who are making repairs

   alleged to have been precipitated by ungraceful mating of

   headset connectors.



   Bob. . .

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emrath(at)comcast.net
Guest

Posted: Wed Oct 22, 2008 6:27 pm Post subject: Head Set Jack shoring out

Bob,

I spoke to the electric man at our airport about this issue.  He claims that

the jacks have a 28v tip to accommodate BOSE head sets in the plane.  It

seems that the shorting occurs when the jack in plugged in which shorts out

the audio panel's modulation side of panel.  Does this make any sense?



Marty



Time: 08:19:34 PM PST US

From: "Robert L. Nuckolls, III" <nuckolls.bob(at)cox.net>

Subject: Re: Head Set Jack shoring out



At 06:49 PM 10/20/2008 -0500, you wrote:

 	  Quote: 	
		  

Bob,



I received this message from a FBO where I rent planes.  Any idea why 

this is even possible?



"When flying Diamond aircraft at Wings of Eagles, headsets MUST be 

plugged in BEFORE turning the radios on.  If this procedure is not 

followed, it could result in the headset jack shorting out, which 

renders the jack inoperative & obviously not being able to communicate 

effectively.  Your adherence to this practice will result in a more 

pleasant flight experience and less aircraft down time due to 

maintenance.  Thank you in advance for your cooperation"


	


   I am unaware of the physics that might justify such a protocol.

   It is true that for stereo headphones and depending on the

   design of the jack, right and left channels can be momentarily

   shorted together but I'm betting these are not stereo headset

   installations . . . and even so, momentary shorts between channels

   shouldn't be big deal.



   I've never encountered a microphone or headset installation

   where engaging or disengaging the connector while the radios

   are ON presents any kind of risk to the equipment. It would

   be interesting to talk to the technicians who are making repairs

   alleged to have been precipitated by ungraceful mating of

   headset connectors.



   Bob. . .

M

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