Today's Message Index:
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1. 11:18 AM - Re: Re: Aera 660 Bare Wire Cradle Question (Robert L. Nuckolls, III)
2. 11:40 AM - Re: AeroElectric-List Digest: 1 Msgs - 05/28/19 (Ronald Cox)
3. 12:01 PM - Re: Re: Aera 660 Bare Wire Cradle Question (Charlie England)
4. 01:23 PM - Re: Aera 660 Bare Wire Cradle Question (farmrjohn)
5. 01:39 PM - Re: Aera 660 Bare Wire Cradle Question (farmrjohn)
Message 1
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| Subject: | Re: Aera 660 Bare Wire Cradle Question |
At 04:02 PM 5/28/2019, you wrote:
>
>Bare Wire Question, Part II. I asked Garmin about the AWG for the
>wires in the harness. Their reply 20AWG for power and ground, and
>26AWG or 28AWG for the others. The pins I see online at Aircraft
>Spruce of Steinair only show 20-24AWG as the working range. Are
>pins for the smaller wires available, and will they work in a
>standard d-sub connector? I would use either 20 or 22 for the
>connections to the rest of the airplane.
22AWG is quite adequate for all the Garmin
wiring. That '20AWG power and ground" meme
has been around for decades . . . I have no
idea as to the rational behind it in small
appliances that draw small currents. I suppose
someone thought that it was a good thing to
minimize the resistance/reactance between
their electro-whizzy and the ship's power
supply . . . but to levy this as a requirement
suggests that their DO160 qualification testing
was sketchy . . . it makes no sense to me
whatsoever.
Bob . . .
Message 2
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| Subject: | Re: AeroElectric-List Digest: 1 Msgs - 05/28/19 |
>
> Time: 02:02:50 PM PST US
> Subject: AeroElectric-List: Re: Aera 660 Bare Wire Cradle Question
> From: "farmrjohn" <faithvineyard@yahoo.com>
>
>
> Bare Wire Question, Part II. I asked Garmin about the AWG for the wires
> in the
> harness. Their reply 20AWG for power and ground, and 26AWG or 28AWG for
> the
> others. The pins I see online at Aircraft Spruce of Steinair only show
> 20-24AWG
> as the working range. Are pins for the smaller wires available, and will
> they
> work in a standard d-sub connector? I would use either 20 or 22 for the
> connections
> to the rest of the airplane.
>
>
> Read this topic online here:
>
> http://forums.matronics.com/viewtopic.php?p=489386#489386
John,
As Bob has pointed out before here, you can use those pins for the smaller
wires, or you can just wire everything with 22 gauge wire. The weight
penalty will be minuscule.
If you're determined to use those tiny wires, you can just fold them over
double and insert them into the pins before you crimp or solder them.
Ron
>
Message 3
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| Subject: | Re: Aera 660 Bare Wire Cradle Question |
=81=A3Sent from BlueMail =8B
On May 29, 2019, 1:22 PM, at 1:22
PM, "Robert L=2E Nuckolls, III" <nuckolls=2Ebob@aeroelectric=2Ecom> wrote:
>At 04:02 PM 5/28/2019, you wrote:
>>--> AeroElectric-List message posted b
y: "farmrjohn"
><faithvineyard@yahoo=2Ecom>
>>
>>Bare Wire Question, Part I
I=2E I asked Garmin about the AWG for the
>>wires in the harness=2E Thei
r reply 20AWG for power and ground, and
>>26AWG or 28AWG for the others=2E
The pins I see online at Aircraft
>>Spruce of Steinair only show 20-24AW
G as the working range=2E Are
>>pins for the smaller wires available, and
will they work in a
>>standard d-sub connector? I would use either 20 or
22 for the
>>connections to the rest of the airplane=2E
>
>22AWG is quite
adequate for all the Garmin
>wiring=2E That '20AWG power and ground" meme
>has been around for decades =2E =2E =2E I have no
>idea as to the rational
behind it in small
>appliances that draw small currents=2E I suppose
>some
one thought that it was a good thing to
>minimize the resistance/reactance
between
>their electro-whizzy and the ship's power
>supply =2E =2E =2E but
to levy this as a requirement
>suggests that their DO160 qualification test
ing
>was sketchy =2E =2E =2E it makes no sense to me
>whatsoever=2E
>
>
>
Bob =2E =2E =2E
Message 4
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| Subject: | Re: Aera 660 Bare Wire Cradle Question |
user9253 wrote:
> Digikey has D-Sub contacts made for 28 AWG wire. Mouser also has them but their
search engine makes them hard to find unless you search for the manufacturer's
part number. Be careful not to buy the high density contacts which will
not fit in a regular density connector. An option is to buy all one size, 20-24,
and, when using smaller wire, fill the void with a short piece of solid hookup
wire. Or fold the small wire back on itself to make it twice as big.
> https://www.digikey.com/products/en/connectors-interconnects/d-sub-d-shaped-connectors-contacts/332?FV=ffe0014c%2C13800b2%2C16040027%2C1f140000&quantity=0&ColumnSort=1000011&page=1&stock=1&k=D-Sub&pageSize=25&pkeyword=D-Sub
Thanks for the link. I did manage to find some 22-28awg pins and sockets with
the Digikey search, and that prompted my question about the socket size. It looks
like the Digikey part A34501-ND will fit the male d-sub for the bare wire
harness as previously suggested.
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=489392#489392
Message 5
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| Subject: | Re: Aera 660 Bare Wire Cradle Question |
ceengland7(at)gmail.com wrote:
> Sent from BlueMail (http://www.bluemail.me/r?b=14874)
> On May 29, 2019, at 1:22 PM, "Robert L. Nuckolls, III" wrote:
> > At 04:02 PM 5/28/2019, you wrote:
> >
> > >
> > > Bare Wire Question, Part II. I asked Garmin about the AWG for the wires
in the harness. Their reply 20AWG for power and ground, and 26AWG or 28AWG for
the others. The pins I see online at Aircraft Spruce of Steinair only show
20-24AWG as the working range. Are pins for the smaller wires available, and
will they work in a standard d-sub connector? I would use either 20 or 22 for
the connections to the rest of the airplane.
> >
> >
> >
> > Power and Ground are shown as 20 AWG.
> > 22AWG is quite adequate for all the Garmin
> > wiring. That '20AWG power and ground" meme
> > has been around for decades . . . I have no
> > idea as to the rational behind it in small
> > appliances that draw small currents. I suppose
> > someone thought that it was a good thing to
> > minimize the resistance/reactance between
> > their electro-whizzy and the ship's power
> > supply . . . but to levy this as a requirement
> > suggests that their DO160 qualification testing
> > was sketchy . . . it makes no sense to me
> > whatsoever.
> >
> >
> > Bob . . . John,On the pin question, I'd just strip a 22 gauge wire and
stick it in next to the 24 or 28 gauge wire in a standard pin, prior to crimping.
> >
>
The actual bare wires with the 660 cradle are different sizes with the ends pre-stripped.
This is the response I received from Garmin when I asked what size
the wires were:
"Thank you for contacting Garmin International. The AERA 660 wiring harness AWG
are as follows:
Pins 1, 5 are 26AWG wire
All other pins are 28AWG
Power and Ground are shown as 20 AWG."
Their bare wire cradle has no pins specified, just the different functions and
wire color, ie. RS-232 RX 1 Yellow, RS-232 TX 1 Blue. The red power wire does
have a 3 amp inline fuse and holder spiced in just prior to the free end.
Bare Wire Question, Part IV. Would a crimper such as https://www.steinair.com/product/4-way-indent-crimper/ work with the 26-28awg pins or would using the "standard" 20-24awg pin with a second filler wire be a better option?
Thanks, and sorry about not being able to combine and edit quotes in my messages..
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=489394#489394
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