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5-pin mic jack for RAC trim

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dredmoody(at)cox.net
Guest

Posted: Sun Feb 24, 2008 8:15 am Post subject: 5-pin mic jack for RAC trim

http://www.qsradio.com/Connectors.htm

  

 Okay guys and gals, I found the mysterious 5-pin  plug at the site linked above. Scroll down about 80%... the various versions  with different numbers of pins are listed there. 

  

 These connectors are a nice neat professional  looking way to make connections at the tail, the wing roots, anywhere that might  need to come apart someday. 

  

 The four pin version is available at Radio Shack in  my home town so I guess it is available elsewhere as well.

  

 Dred

   [quote][b]

naumuk(at)alltel.net
Guest

Posted: Sun Feb 24, 2008 8:52 am Post subject: 5-pin mic jack for RAC trim

Dred-

     Where did you install the panel  mount? I'm guessing on the rear stab mount. If you put it where the grommet is  on the elevator, the male connector would probably interfere with free  travel.

                                                                 Bill

 [quote]   ---

georgerace

Joined: 25 Oct 2006
Posts: 788
Location: Albion, MI

Posted: Sun Feb 24, 2008 11:47 am Post subject: 5-pin mic jack for RAC trim

Just a few words  about Radio Shack and other similar microphone connectors.

  

 The contacts are  mostly made of plated brass, or something similar.  They do not do well in  wet conditions or where there is a lot of humidity in the air or a lot of  condensation from being hot and cold in an outdoor atmosphere.  The  contacts, within the connectors, tend to get very corroded causing intermittent  connections.

  

 In addition those  kind of connectors are not rated for the kind of current that your tail light,  for example, would be pulling through the connector.  I don't think that an  elevator trim servo would be any problem.  But to be sure, look up the DC  Continuous Current Rating BEFORE using this type of  connector.

  

 If you DO use these  kind of connectors, and there is any chance of them becoming wet, probably the  best thing you could do would be to seal them heat shrink tubing.  The kind  that has a molten center that makes an airtight seal around the wires would  be best.

  

 George

 CH-701 Kit - N73EX  (Reserved)

   [quote][b]

_________________
Check out my CH-701 project at:
http://www.mykitairplane.com

Jaybannist(at)cs.com
Guest

Posted: Sun Feb 24, 2008 12:56 pm Post subject: 5-pin mic jack for RAC trim

George,



Heat shrink tubing "with a molten center" is something I have never heard of.  Could you give a little more information about this, ie: name, where to get it, etc.?



Thanks,

Jay in Dallas 601XL N2630J "Lil Bruiser" 

"George Race" <mykitairplane(at)mrrace.com> wrote:



 	  Quote: 	
		  Just a few words about Radio Shack and other similar microphone connectors.

 

The contacts are mostly made of plated brass, or something similar.  They do

not do well in wet conditions or where there is a lot of humidity in the air

or a lot of condensation from being hot and cold in an outdoor atmosphere.

The contacts, within the connectors, tend to get very corroded causing

intermittent connections.

 

In addition those kind of connectors are not rated for the kind of current

that your tail light, for example, would be pulling through the connector.

I don't think that an elevator trim servo would be any problem.  But to be

sure, look up the DC Continuous Current Rating BEFORE using this type of

connector.

 

If you DO use these kind of connectors, and there is any chance of them

becoming wet, probably the best thing you could do would be to seal them

heat shrink tubing.  The kind that has a molten center that makes an

airtight seal around the wires would be best.

 

George

CH-701 Kit - N73EX (Reserved)

naumuk(at)alltel.net
Guest

Posted: Sun Feb 24, 2008 2:21 pm Post subject: 5-pin mic jack for RAC trim

George-

     Jeff showed me his set-up, which  is actually a 9 pin computer serial connector! He's been flying since the late  '90s.

                                                                     Bill

 [quote]   ---

amyvega2005(at)earthlink.
Guest

Posted: Sun Feb 24, 2008 2:23 pm Post subject: 5-pin mic jack for RAC trim

gp to an electronics shop other than Radio Shack and ask for heat shrink with heat activated glue cores.  



Or go on line.



Juan



--

Jaybannist(at)cs.com
Guest

Posted: Sun Feb 24, 2008 3:30 pm Post subject: 5-pin mic jack for RAC trim

Juan,  Thanks - Jay

do not archive

Juan Vega <amyvega2005(at)earthlink.net> wrote:



[quote]



gp to an electronics shop other than Radio Shack and ask for heat shrink with heat activated glue cores.  



Or go on line.



Juan



--

craig(at)craigandjean.com
Guest

Posted: Sun Feb 24, 2008 3:50 pm Post subject: 5-pin mic jack for RAC trim

There are connectors designed for harsh environments. One example are automotive connectors with individual seals on the leads. Waytek sells them:  

   

http://order.waytekwire.com/IMAGES/M37/catalog/220_033.pdf (top of the page)  

   

-- Craig  

       

From: owner-zenith-list-server(at)matronics.com [mailto:owner-zenith-list-server(at)matronics.com] On Behalf Of George Race

 Sent: Sunday, February 24, 2008 12:44 PM

 To: zenith-list(at)matronics.com

 Subject: Re: 5-pin mic jack for RAC trim  

  

  

     

Just a few words about Radio Shack and other similar microphone connectors.  

    

   

    

The contacts are mostly made of plated brass, or something similar.  They do not do well in wet conditions or where there is a lot of humidity in the air or a lot of condensation from being hot and cold in an outdoor atmosphere.  The contacts, within the connectors, tend to get very corroded causing intermittent connections.  

    

   

    

In addition those kind of connectors are not rated for the kind of current that your tail light, for example, would be pulling through the connector.  I don't think that an elevator trim servo would be any problem.  But to be sure, look up the DC Continuous Current Rating BEFORE using this type of connector.  

    

   

    

If you DO use these kind of connectors, and there is any chance of them becoming wet, probably the best thing you could do would be to seal them heat shrink tubing.  The kind that has a molten center that makes an airtight seal around the wires would be best.  

    

   

    

George  

    

CH-701 Kit - N73EX (Reserved)  

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       [quote][b]

Terry Phillips

Joined: 11 Jan 2006
Posts: 346
Location: Corvallis, MT

Posted: Sun Feb 24, 2008 4:18 pm Post subject: 5-pin mic jack for RAC trim

When I was getting ready to wire up my elevator trim servo, I posed the connector question on the Aeroelectric list. I was directed towards a modified DB-9 connector that was originally suggested for this application by Electric Bob. The resultant thread is here:



 http://forums.matronics.com/viewtopic.php?t=35647



 One of the responders provides a link to Bob's descriptive web pages.



 Nuckoll's recommends DB connectors as inexpensive, high quality (gold plated contacts), and builder friendly. I plan to use them extensively--when I get to FWF and panel. I used the modified DB-9 on my elevator and aileron trims. The circuits test out fine. It'll be a while before I can prove them in the air. For a description of what I did, go to my KitlogPro site (see link below) and check out the 12/7/07, 12/11/07, 1/25/08 & 1/27/08 logs. 



 Incidentally, somewhere in the info I collected on this subject was a recommendation from RAC to not use crimp connectors on their AWG24 or 26 servo wires. They recommend only solder connections for those wires. It was difficult to locate a source for solder type male DB-9's, but I found a place with good selection & price, Action-Electronics.com.  I used gold-plated crimp-type sockets from SteinAir ($.25/ea) for the AWG-22 connection wires.



 Also, regarding the adhesive coated heat shrink tubing, McMaster-Carr has an amazing selection of heat shrink tubing, both with and without adhesive. I used the adhesive type on my 1st 2 DB-9 connectors and wish I hadn't. I don't think they can be disassembled w/o damage. 



 There are lots of acceptable ways to make these connections. I offer the DB-9's as an alternative to the microphone connectors that you may want to consider. I think will work for me. YMMV.



 Terry



 

 At 02:44 PM 2/24/2008 -0500, you wrote:

  	  Quote: 	
		  Just a few words about Radio Shack and other similar microphone connectors.

  

 The contacts are mostly made of plated brass, or something similar.  They do not do well in wet conditions or where there is a lot of humidity in the air or a lot of condensation from being hot and cold in an outdoor atmosphere.  The contacts, within the connectors, tend to get very corroded causing intermittent connections.

  

 In addition those kind of connectors are not rated for the kind of current that your tail light, for example, would be pulling through the connector.  I don't think that an elevator trim servo would be any problem.  But to be sure, look up the DC Continuous Current Rating BEFORE using this type of connector.

  

 If you DO use these kind of connectors, and there is any chance of them becoming wet, probably the best thing you could do would be to seal them heat shrink tubing.  The kind that has a molten center that makes an airtight seal around the wires would be best.

  

 George

 CH-701 Kit - N73EX (Reserved) 	
 

 

 Terry Phillips

 ttp44~at~rkymtn.net

 Corvallis MT

 601XL/Jab 3300 s .. l .. o .. o .. w build kit - Tail, flaps, & ailerons are done; working on the wings

 http://www.mykitlog.com/N47TP/     [quote][b]

_________________
Terry Phillips
Corvallis, MT
ttp44<at>rkymtn.net
Zenith 601XL/Jab 3300 slow build kit - Tail feathers done; working on the wings.

dredmoody(at)cox.net
Guest

Posted: Mon Feb 25, 2008 4:37 am Post subject: 5-pin mic jack for RAC trim

I used a piece of 6061-T6 1/8" extruded angle to  make a bracket for the panel mount piec and it will mount under the rudder  fairing, on the upper surface of the H-stab once I run the elevator cable. It  obviously has to be off center enough to miss the cable. From the bracket  mounted panel mount part, the RAC cable travels on to the elevator and trim  servo. If the tail parts need to be removed, the male part of the connector  stays with the fuselage and the rest stays with the tail.

  

 Dred

   [quote][b]

dredmoody(at)cox.net
Guest

Posted: Mon Feb 25, 2008 4:41 am Post subject: 5-pin mic jack for RAC trim

I have used this connector without any trouble for  five years in the tail area of my EAB registered fat ultralight. I have not even  shrink wrapped it, except of course for where the cable enters the two connector  parts. The junction of the two halves of the connector is a screw together  fitting that seems to be sealed well enough based on past performance.  

  

 As a general rule, if the appropriate gauge is too  large to fit into the little solder tubes of the connector, use a heftier  connector. The entire trim system calls for a 2 amp breaker or  fuse.

  

 Dred

   [quote][b]

dougsnash(at)yahoo.com
Guest

Posted: Mon Feb 25, 2008 8:11 am Post subject: 5-pin mic jack for RAC trim

A fool proof way to connect the trim servo is to

solder and heat shrink the connection (being careful

to clean the flux off first).  Ideally using the glued

heat shrink mentioned earlier.



Everyone is probably about to jump up and down and

say, what about removal of the elevator?  Lets face

it, how often do we remove these control surfaces? 

After the initial final installation, we may remove

the elevator once or twice more in the life of the

plane.  Leave an extra half inch of wire and you can

cut and re-solder the connection at that time.  



This approach eleimates the worry of pin corrosion or

the connector becoming loose etc.  I'm not saying it

is the only way to do it, just one more option.



Doug MacDonald

CH-701 Scratch Builder

NW Ontario, Canada



DO NOT ARCHIVE

--- Terry Phillips <ttp44(at)rkymtn.net> wrote:



 	  Quote: 	
		   When I was getting ready to wire up my elevator trim

 servo, I posed the 

 connector question on the Aeroelectric list. I was

 directed towards a 

 modified DB-9 connector that was originally

 suggested for this application 

 by Electric Bob. The resultant thread is here:

 

 http://forums.matronics.com/viewtopic.php?t=35647

 

 One of the responders provides a link to Bob's

 descriptive web pages.


	


Never miss a thing.  Make Yahoo your home page. 

http://www.yahoo.com/r/hs

goodings(at)yorku.ca
Guest

Posted: Tue Feb 26, 2008 8:33 am Post subject: 5-pin mic jack for RAC trim

I am a huge believer in silicone grease.  Every electrical contact in my

aircraft (nuts, washers, lock washers, screw threads on bolts, pins and

sockets on multi-pin plugs and jacks, etc.) is smeared with silicone

grease before I leave it assembled.  I have NEVER had one of these fail to

make contact because of the grease.  When I look occasionally at one of

these contacts done 5 or 10 years (or even longer!) ago, the contact is

still covered with silicone grease (a thin layer, put on with my fingers -

not slathered on) and the corrosion is zero.



John Goodings, C-FGPJ, CH601HD with R912S, Toronto/Carp/Ottawa.

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