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  #1  
Old 11-08-2007, 09:28 AM
mike newall's Avatar
mike newall mike newall is offline
 
Join Date: Jan 2005
Location: Yorkshire, England
Posts: 890
Default Jack Plug Wiring

We are doing the last of the electrics and have just got ourselves a bit stumped.

We have pigtails coming down to the headset and mic jacks in shielded cable - we are using the Approach Systems Hub which has worked really well.

Jacks are Switchcraft from Aircraft Spruce but we now find that they don't include the insulating washers for the mic jacks - useless lot !

Also, we have no wiring diagram for the stereo headset jack or for the mic jack.

The leads from the GMA-340 are labelled

Pilot phones L, R and LO.

Pilot Mic HI, LO, KEY

We have a seperate pigtail for the ptt on each stick.

Any suggestions welcome please
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  #2  
Old 11-08-2007, 10:37 AM
johnp johnp is offline
 
Join Date: Feb 2005
Location: Austin, TX
Posts: 225
Default

Quote:
Originally Posted by mike newall View Post
We are doing the last of the electrics and have just got ourselves a bit stumped.

We have pigtails coming down to the headset and mic jacks in shielded cable - we are using the Approach Systems Hub which has worked really well.

Jacks are Switchcraft from Aircraft Spruce but we now find that they don't include the insulating washers for the mic jacks - useless lot !

Also, we have no wiring diagram for the stereo headset jack or for the mic jack.

The leads from the GMA-340 are labelled

Pilot phones L, R and LO.

Pilot Mic HI, LO, KEY

We have a seperate pigtail for the ptt on each stick.

Any suggestions welcome please
here's what i think is correct (may have left & right swapped):

pilot phones R -- tip of headphone jack
pilot phones L -- middle ring of headphone jack
pilot phones LO -- outer ring of headphone jack

pilot mic Key -- tip of mic jack
pilot mic HI -- middle ring of mic jack
pilot mic LO -- outer ring of mic jack

stein sells the insulating washers cheap -- iirc, it's about 80 cents per connector.
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  #3  
Old 11-08-2007, 11:06 AM
mike newall's Avatar
mike newall mike newall is offline
 
Join Date: Jan 2005
Location: Yorkshire, England
Posts: 890
Default

Thanks John,

Just got a very fast reply from Approach Systems with a diagram etc. Their system has been excellent, the customer back up great and - as of today - it works because we put power on the airplane for the first time !

I don't have any US trips through the winter, Indonesia beckons on Monday so I will source some of the washers in the UK.

Thanks
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  #4  
Old 11-09-2007, 06:38 PM
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craigvince craigvince is offline
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Join Date: Sep 2006
Location: Stockton, CA
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Default washers

I don't know about Stein's washers, but the ones I ordered from ACS aren't extruded. In other words, they don't insulate the hole in the airframe from the jack itself. I ended up ordering the extruded washers from B&C, which arrived today.
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  #5  
Old 11-09-2007, 08:03 PM
SteinAir SteinAir is offline
 
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Location: Minneapolis
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Default

Yep they're extruded...we only sell what should be used - the right ones that is!

Cheers,
Stein
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  #6  
Old 11-11-2007, 10:19 PM
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Rick_A Rick_A is offline
 
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Location: Highland Village, TX
Posts: 1,039
Default good mic jack pic

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  #7  
Old 11-19-2007, 01:20 PM
mike newall's Avatar
mike newall mike newall is offline
 
Join Date: Jan 2005
Location: Yorkshire, England
Posts: 890
Default

Nice photo Rick,

Switchraft are sending me some washers direct - excellent company to deal with by the way.
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