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Potentiometer for dimming panel lights

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hilltopkid

Joined: 10 Jul 2016
Posts: 10
Location: Richmond, VA

Posted: Sun Nov 08, 2020 6:45 am Post subject: Potentiometer for dimming panel lights

Long time since I've posted Bob and friends, but we've run into a situation someone may have an answer to. My partner Doug bought 3 potentiometers from Mouser to use for dimming panel, map and courtesy lights on our Sportsman. They are Bourns ½"  5K 1% units, Part number 652-53RAA-R25-A13L, $8.76 each. What happened was during his careful handling during installation in the panel with the glare shield off and the EFIS removed for good access, two of the potentiometers had attachment pins break off. Yes, the pins are small, but apparently are unbelievably brittle. Did  somehow we make them brittle during soldering? (Doug has a really nice soldering pencil with digital readout for the set temperature.) He has soldered many, many other electronic components in the Sportsman and never had this problem. 



Does anyone have a suggestion for a similar potentiometer that has more robust pins? At $8.76 each Doug thought he was choosing a relatively high quality part.



Thanks for any suggestions.



Dee

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DeWitt (Dee) Whittington
Richmond, VA

glastar(at)gmx.net
Guest

Posted: Sun Nov 08, 2020 11:26 am Post subject: Potentiometer for dimming panel lights

Hi Dee,



why not solder it onto a small "stripe circuit board" so you can use

some shoe glue to fix it to the board and then solder the lead in one of

the holes?



That should get a bit more robust with this?



Cheers Werner



On 08.11.2020 15:45, hilltopkid wrote:

 	  Quote: 	
		   



 Long time since I've posted Bob and friends, but we've run into a situation someone may have an answer to. My partner Doug bought 3 potentiometers from Mouser to use for dimming panel, map and courtesy lights on our Sportsman. They are Bourns Â½"  5K 1% units, Part number 652-53RAA-R25-A13L, $8.76 each. What happened was during his careful handling during installation in the panel with the glare shield off and the EFIS removed for good access, two of the potentiometers had attachment pins break off. Yes, the pins are small, but apparently are unbelievably brittle. Did  somehow we make them brittle during soldering? (Doug has a really nice soldering pencil with digital readout for the set temperature.) He has soldered many, many other electronic components in the Sportsman and never had this problem.



 Does anyone have a suggestion for a similar potentiometer that has more robust pins? At $8.76 each Doug thought he was choosing a relatively high quality part.



 Thanks for any suggestions.



 Dee



 --------

 DeWitt (Dee) Whittington

 Richmond, VA

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user9253

Joined: 28 Mar 2008
Posts: 1925
Location: Riley TWP Michigan

Posted: Sun Nov 08, 2020 11:29 am Post subject: Re: Potentiometer for dimming panel lights

I searched for a higher wattage.  I have not used this part but it looks more robust.

Mouser #:774-026TB32R502B1B1  Mfr. #:026TB32R502B1B1

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Joe Gores

nuckolls.bob(at)aeroelect
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Posted: Sun Nov 08, 2020 2:24 pm Post subject: Potentiometer for dimming panel lights

At 08:45 AM 11/8/2020, you wrote:

  	  Quote: 	
		  --> AeroElectric-List message posted by: "hilltopkid" <dee.whittington(at)gmail.com>



 Long time since I've posted Bob and friends . . . 	


   It has been a long time my friend. OSH 2007?



  	  Quote: 	
		  . . . but we've run into a situation someone may have an answer to. My

 partner Doug bought 3 potentiometers from Mouser to use for dimming

 panel, map and courtesy lights on our Sportsman. They are Bourns

 Part number 652-53RAA-R25-A13L, $8.76 each. What happened was

 during his careful handling during installation in the panel with

 the glare shield off and the EFIS removed for good access, two

 of the potentiometers had attachment pins break off. 	


  Attached photos illustrate a technique I've

  used for a few decades to bring airframe wires

  of little buggers like that.  My pre-wired

  panel potentiometers for the dimmer kits we used

  to sell were fabricated with this technique.



  Stay healthy and fly comfortably my friend!



 

   Bob . . .

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hilltopkid

Joined: 10 Jul 2016
Posts: 10
Location: Richmond, VA

Posted: Sun Nov 08, 2020 4:54 pm Post subject: Potentiometer for dimming panel lights

Thanks, all. Later this week we’ll try t install the pots again by utilizing your suggestions. I’m forwarding them to Doug Hanson, one of my three partners in the Sportsman.

By the way, the big news is we now have a Hangar E8 at Hanover County Airport, KPTB, about 10 miles north of Richmond, VA. We will be trailering our Sportsman one within 2 weeks. KOFP is the airport we wanted on which we wanted to be based. They rarely have openings so we were resigned to start out at Chesterfield County Airport, KFCI.. We are so close to finishing this everlasting project, partially due to an engine switch from 3.6L Eggenfellner Subaru with Quinti 4-blade CS prop to an O-360-A1A Lycoming with Hartzell CS prop, Boy was it a job to extract all sorts of parts, cover holes in the firewall, remove the header tank behind the seats, and add the two provided by Glasair, and much, much more.



At the moment we are waiting for our registration for N18TA to come through from FAA Oak City. I have a DAR lined up.



Dee 	  Quote: 	
		  On Nov 8, 2020, at 5:17 PM, Robert L. Nuckolls, III <nuckolls.bob(at)aeroelectric.com (nuckolls.bob(at)aeroelectric.com)> wrote:

  At 08:45 AM 11/8/2020, you wrote:  	  Quote: 	
		  --> AeroElectric-List message posted by: "hilltopkid" <dee.whittington(at)gmail.com (dee.whittington(at)gmail.com)> Long time since I've posted Bob and friends . . . 	
   It has been a long time my friend. OSH 2007?  	  Quote: 	
		  . . . but we've run into a situation someone may have an answer to. My partner Doug bought 3 potentiometers from Mouser to use for dimming panel, map and courtesy lights on our Sportsman. They are Bourns Part number 652-53RAA-R25-A13L, $8.76 each. What happened was during his careful handling during installation in the panel with the glare shield off and the EFIS removed for good access, two of the potentiometers had attachment pins break off. 	
  Attached photos illustrate a technique I've  used for a few decades to bring airframe wires  of little buggers like that.  My pre-wired  panel potentiometers for the dimmer kits we used  to sell were fabricated with this technique.  Stay healthy and fly comfortably my friend! 

   Bob . . .

  <01_Strip-and-tin.jpg><02_Tack-wires-to-terminals.jpg><03_Encapsulate joints.jpg><04_Plan-B for Square-Back Pots.jpg>

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DeWitt (Dee) Whittington
Richmond, VA

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