Today's Message Index:
----------------------
1. 05:10 AM - Re: Re: Dissimiliar metals (Matthew S. Whiting)
2. 05:51 AM - Re: Dissimiliar metals (user9253)
3. 06:48 AM - Potentiometer for dimming panel lights (hilltopkid)
4. 11:26 AM - Re: Potentiometer for dimming panel lights (Werner Schneider)
5. 11:36 AM - Re: Potentiometer for dimming panel lights (user9253)
6. 02:24 PM - Re: Potentiometer for dimming panel lights (Robert L. Nuckolls, III)
7. 04:54 PM - Re: Potentiometer for dimming panel lights (DeWitt Whittington)
Message 1
| INDEX | Back to Main INDEX |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
| Subject: | Re: Dissimiliar metals |
I never suggested using it in an aircraft. Someone said they had never seen
a conductive grease as though they thought such an animal did not exist. I
was providing existence proof.
Sent from my iPad
> On Nov 7, 2020, at 11:34 PM, Robert L. Nuckolls, III <nuckolls.bob@aeroele
ctric.com> wrote:
>
> =EF=BB At 06:47 PM 11/7/2020, you wrote:
>> Now you have. https://www.amazon.com/MG-Chemicals-Carbon-Conductive-Grea
se/dp/B005T8ROWA/ref=sr_1_3?dchild=1&keywords=conductive+grease&qid=
1604796349&sr=8-3
>
> Th8i stuff is scary . . . if it's a 'mobile' as
> silicone based products cite in earlier post . . .
> well . . . before using any such thing on your
> project's electrical parts you need to determine:
>
> (a) was my initial section of part/process in error?
>
> (b) is there a demonstrable deficiency in the
> performance of installed parts?
>
> The study of history is not terribly revered
> amongst members of the general public. I
> suggest it is of PRIME importance in the
> practice of our craft.
>
> If there is a perceived value for applying some
> new or novel product to your project, you would
> do well to:
>
> (1) understand the physics behind any shortcoming
> in proposed material/processes followed up with:
>
> (2) "Gee, did I neglect a the wisdom offered by
> folks who have already been-there-done-that?
>
> Bob . . .
Message 2
| INDEX | Back to Main INDEX |
| PREVIOUS | Skip to PREVIOUS Message |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
| Subject: | Re: Dissimiliar metals |
I think that any grease product advertised as conductive will not help conduct
electrical current found in our airplanes. It might help to conduct static
electricity. If anyone has some conductive grease, please measure its
resistance with an ohmmeter and let us know the results. I predict the
resistance will be infinite. Notice that these products do not claim to be
"electrically" conductive. They are thermally conductive. Yes, the products
might be recommended for electrical connections. But they do not conduct
electricity, at least not at the voltages and frequencies found in our airplanes.
--------
Joe Gores
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=499306#499306
Message 3
| INDEX | Back to Main INDEX |
| PREVIOUS | Skip to PREVIOUS Message |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
| 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 " 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
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=499309#499309
Message 4
| INDEX | Back to Main INDEX |
| PREVIOUS | Skip to PREVIOUS Message |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
| Subject: | Re: 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:
>
> 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 " 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
>
>
Message 5
| INDEX | Back to Main INDEX |
| PREVIOUS | Skip to PREVIOUS Message |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
| 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
--------
Joe Gores
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=499310#499310
Message 6
| INDEX | Back to Main INDEX |
| PREVIOUS | Skip to PREVIOUS Message |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
| Subject: | Re: Potentiometer for dimming panel lights |
At 08:45 AM 11/8/2020, you wrote:
><dee.whittington@gmail.com>
>
>Long time since I've posted Bob and friends . . .
It has been a long time my friend. OSH 2007?
>. . . 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 . . .
Message 7
| INDEX | Back to Main INDEX |
| PREVIOUS | Skip to PREVIOUS Message |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
| Subject: | Re: Potentiometer for dimming panel lights |
Thanks, all. Later this week we=99ll try t install the pots again
by utilizing your suggestions. I=99m 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
> On Nov 8, 2020, at 5:17 PM, Robert L. Nuckolls, III
<nuckolls.bob@aeroelectric.com> wrote:
>
> At 08:45 AM 11/8/2020, you wrote:
<dee.whittington@gmail.com>
>>
>> Long time since I've posted Bob and friends . . .
>
> It has been a long time my friend. OSH 2007?
>
>> . . . 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>
Other Matronics Email List Services
These Email List Services are sponsored solely by Matronics and through the generous Contributions of its members.
-- Please support this service by making your Contribution today! --
|