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ANR Headset Power without batteries

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larry(at)ncproto.com
Guest

Posted: Thu Mar 15, 2007 9:54 am Post subject: ANR Headset Power without batteries

I have a Telex Stratus 50D that I ordered with a “Lemo” connector (to use ship’s power) and battery pack as an accessory.  This battery pack uses 6 each AA batteries.  

   

My dilemma is that I own 2 aircraft (both tandem seating) and several headsets (all ANR) and need to eliminate all battery packs.  I have a strong dislike of things flopping around in the cockpit.  This dilemma seems to be exasperated by the lack of a standard power voltage and connector to drive the ANR in all headsets.  

   

My questions are:  

<![if !supportLists]>1)                  <![endif]>What voltage does my 50D headset ANR run on ??  The specs in the Telex website differ from my actual unit in that my unit is using 6 ea AA batteries.  The website says this unit runs on 4 each AA batteries.  If it is running on 9 volts it will help my situation.  I’ve contacted Telex about this and am waiting for an answer.  

<![if !supportLists]>2)                  <![endif]>One of my other ANR Headsets is a helmet with Headsets Inc. ANR system that runs on 9vdc.  I spoke with Headsets Inc. and he didn’t know what connector he is using for the power – would anyone here know ??  

<![if !supportLists]>3)                  <![endif]>Does anyone have a sense of a “standard” connector configuration emerging ??  

<![if !supportLists]>4)                  <![endif]>I believe the connector configuration I will be choosing will be:  

<![if !supportLists]>a.       <![endif]>Standard microphone connector  

<![if !supportLists]>b.       <![endif]>Standard headset connector  

<![if !supportLists]>c.       <![endif]>Similar style but different sized plug for ANR power – powered at 9 vdc.  

This would allow each headset with this configuration to be used in any of my aircraft; or any other aircraft with either no ANR or an auxiliary battery pack to power the ANR.  Would you please give me feedback on this plan ??  Is it optimal ??  

<![if !supportLists]>5)                  <![endif]>What power connector would anyone here recommend ??  

<![if !supportLists]>6)                  <![endif]>Is there any other source for this magic Power Supply to supply good 9 vdc ??  

<![if !supportLists]>7)                  <![endif]>My wife has the Bose headset – I’m guessing it runs off a different voltage given it uses 2 each AA batteries.  What can I do to make it fit into my scheme ??  

   

My design goals are:  

<![if !supportLists]>A)                  <![endif]>Inter-compatibility (or as much as possible) between my headsets and my aircraft.  

<![if !supportLists]>B)                  <![endif]>No battery packs in my 2 aircraft  

<![if !supportLists]>C)                  <![endif]>Ability to allow anyone else with standard headsets to plug into my aircraft (with or without their own ANR).  

<![if !supportLists]>D)                  <![endif]>Ability to use my headsets in other aircraft not equipped with my ANR Power plugs – using an auxiliary battery pack of my own.  

<![if !supportLists]>E)                  <![endif]>Keep all of my headset cords short with connectors located near my shoulders (I have done this before and it works very well).  

   

If this is of interest to anyone else I would be happy to post whatever findings I come up with.  

   

Larry E. James  

Bellevue, WA  

Super Decathlon  

Rocket (fuselage / systems)  

   

       [quote][b]

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echristley(at)nc.rr.com
Guest

Posted: Thu Mar 15, 2007 10:55 am Post subject: ANR Headset Power without batteries

I have Telex headsets, and they use a miniDIN connector into their 

battery pack. I made up small connector panels for each of the headset 

positions, placed them close to the shoulders as you described, and ran 

a twisted pair to each. The twisted pairs all come back to an LM317 

based power regulator set to provide 9V. Any headsets I purchase will be 

9V compatible. I can add the miniDIN connector if it isn't there already.



4 AAs will be 6V I believe, and 2 AAs will be 3V. 1.5V for each cell. 

But they may be wired in parallel within the battery pack, instead of in 

series. Series configuration multiplies the voltage. Parallel 

configuration multiplies the (capability to supply) current. It's not 

save to assume. It would be relatively easy to set up the LM317 to 

switch between regulating resistors, but you stand a STRONG chance of 

ruining a very expensive piece of headset gear. If you must have varied 

types of headsets, the real solution is to have construct a regulator 

for each, put it in a tiny box that stays attached to the ANR power cord 

and will then interface with ships power. You can set each headset to 

what it expects.



Larry James wrote:



 	  Quote: 	
		   My design goals are:



 A) Inter-compatibility (or as much as possible) between my headsets 

 and my aircraft.



 B) No battery packs in my 2 aircraft



 C) Ability to allow anyone else with standard headsets to plug into my 

 aircraft (with or without their own ANR).



 D) Ability to use my headsets in other aircraft not equipped with my 

 ANR Power plugs – using an auxiliary battery pack of my own.



 E) Keep all of my headset cords short with connectors located near my 

 shoulders (I have done this before and it works very well).




	




-- 

         ,|"|"|,              Ernest Christley       |

----===<{{(oQo)}}>===----    Dyke Delta Builder      |

        o|  d  |o        http://ernest.isa-geek.org  |

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david(at)ChalmersFamily.c
Guest

Posted: Thu Mar 15, 2007 11:31 am Post subject: ANR Headset Power without batteries

In my  Quickie Q200 I installed Bose connectors and paralleled them up with standard  headphone/microphone jacks to allow use of either Bose powered headsets or  regular headsets. Works great but you need a battery pack for other ANR  headsets. If I did it again I would just install Bose connectors and make up  some short pigtails with a Bose male on one end and standard headphone  sockets on the other. You could add a power connector to the pigtail for  other ANR headsets. To deal with the stereo/mono issue I used stereo  headphone jacks with a few hundred ohm resistor in series with left and  right to allow use of mono or stereo headphones. IIRC this was suggested by  the intercom manufacturer.

  

 David  Chalmers

 Redmond,WA

 Tri-Q200 N4016G

  

  

 --

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hooverra(at)verizon.net
Guest

Posted: Thu Mar 15, 2007 3:28 pm Post subject: ANR Headset Power without batteries

Larry,

	I just received Jacks for my Headsets Inc. install from Mouser. If you wish to isolate the ground you will also need .312 I.D. Shoulder washers. I didn't order any and had to machine a pair!!



www.mouser.com



-----------------------------------------------------------------

ORDERED  STOCK NUMBER          SHIPPED      PRICE        EXTENDED

-----------------------------------------------------------------

      2    502-L722A                     2        4.290            8.58

         Switchcraft L722A DC Jacks

         PWR JCK LNG BSHG    



"2) One of my other ANR Headsets is a helmet with Headsets Inc. ANR 

system that runs on 9vdc. I spoke with Headsets Inc. and he didn’t know 

what connector he is using for the power – would anyone here know ??"



-- 

Ralph C. Hoover

RV7A 

hooverra at verizon dot net

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hooverra(at)verizon.net
Guest

Posted: Thu Mar 15, 2007 6:40 pm Post subject: ANR Headset Power without batteries

Carl,

    The jury is still out,I have not flown with the ANR conversion yet. 

When I first turned them on in the shop the fan the was running 

disappeared. It seems like they will work just fine. Headsets Inc 

recommends there power adaptor, I believe I will brew my own although I 

am planning on using a switching regulator. The converter they supply is 

ground isolated and that is what I plan on replicating. The converter I 

selected is on backorder until the end of April  . The audio and dc 

power share grounds so there is a chance of introducing noise into the 

system using a LM317 locally at the jacks. I may try the LM317, it sure 

is a lot simpler and cheaper (LM317's) live in my junk box!

The actual installation of the ANR modules was straightforward, the 

hardware is well done. I replaced the cable with the optional cable that 

they offer as I don't like the idea of the power cable zip tied to the 

audio cable.



-- 

Ralph C. Hoover

RV7A 

hooverra at verizon dot net

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zk-vii(at)rvproject.gen.n
Guest

Posted: Thu Mar 15, 2007 7:34 pm Post subject: ANR Headset Power without batteries

Can you provide some details of the ground isolated converter that you are

looking at - I'm just starting on the learning curve for the PCB type

stuff - would be good to see / try and understand how it could be done.  $50

per 9V regulated supply seems a bit steep to me.....



Likewise I would go with a single cord - otherwise looks a bit 'amateurish',

and going DC Mono H10-13.4 to stereo ANR is attractive.



Cheers,



Carl



[quote] --

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trigo(at)mail.telepac.pt
Guest

Posted: Fri Mar 16, 2007 11:13 am Post subject: ANR Headset Power without batteries

Larry

  

 I'm not answering to your questions, which are  partially also mine.

 I will appreciate if you share the  conclusions you arrived at.

  

 TIA

 Carlos

 [quote]   ---

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Tim Olson

Joined: 25 Jan 2007
Posts: 2872

Posted: Fri Mar 16, 2007 12:45 pm Post subject: ANR Headset Power without batteries

I wish I had all the info on it, but a few years back when

I bought 4 of the ANR upgrade kits, I decided to do-it-myself

and bought a larger isolated DC-DC converter and bought the

jacks and put them in for all 4 headsets.  Last year I put

the guts of all of this into my RV-10, but now I have

Bose sets.  At the time when I was using them, it was fantastic

to have the power jacks in the plane.  I do remember though that

back then to do a good job I ended up paying not too much

less than if I would have just bought 4 of their jacks

with the power converter in them.  I'd recommend either

going with theirs, if you have a 2-place plane, or building

your own only if you have a 4-place plane.  I do think you'll

want the ground isolation.  Just think of it as one of those

great things that later you'll forget the pain of buying the

jacks, and make it easy on yourself if possible though.  In the

end, it will be easier to take the jacks out and move them

to another plane, or sell them along with your headset if

you upgrade to something else.



Tim Olson - RV-10 N104CD - Flying

do not archive

Ralph Hoover wrote:

 	  Quote: 	
		   

 <hooverra(at)verizon.net>

 

 Carl,

    The jury is still out,I have not flown with the ANR conversion yet. 

 When I first turned them on in the shop the fan the was running 

 disappeared. It seems like they will work just fine. Headsets Inc 

 recommends there power adaptor, I believe I will brew my own although I 

 am planning on using a switching regulator. The converter they supply is 

 ground isolated and that is what I plan on replicating. The converter I 

 selected is on backorder until the end of April  . The audio and dc 

 power share grounds so there is a chance of introducing noise into the 

 system using a LM317 locally at the jacks. I may try the LM317, it sure 

 is a lot simpler and cheaper (LM317's) live in my junk box!

 The actual installation of the ANR modules was straightforward, the 

 hardware is well done. I replaced the cable with the optional cable that 

 they offer as I don't like the idea of the power cable zip tied to the 

 audio cable.

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