Today's Message Index:
----------------------
1. 07:19 AM - Re: Re: Found it! (Dan Billingsley)
2. 08:41 AM - Re: PMAG (Robert L. Nuckolls, III)
3. 09:43 AM - Re: PMAG (B Tomm)
4. 11:16 AM - Re: PMAG (Robert L. Nuckolls, III)
5. 11:43 AM - Re: PMAG (Tim Andres)
6. 04:08 PM - Re: Anyone interested in a 9lb battery/jumpstart kit? (Jack in Austin)
7. 05:02 PM - Re: Re: Anyone interested in a 9lb battery/jumpstart kit? (Robert L. Nuckolls, III)
8. 06:17 PM - Re: Re: Anyone interested in a 9lb battery/jumpstart kit? (rparigor@suffolk.lib.ny.us)
Message 1
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Thanks Bob, That brought it home for me. Off to get a-2-ckt plug.=0ADan
=0A=0A=0A=0A________________________________=0A From: "Robert L. Nuckolls,
III" <nuckolls.bob@aeroelectric.com>=0ATo: aeroelectric-list@matronics.com
=0ASent: Wednesday, May 30, 2012 8:24 PM=0ASubject: Re: AeroElectric-List:
Re: Found it!=0A =0A=0A=0A- Bob . . . =0A=0AI did get to the hanger today
and quickly pulled the wires out into the=0Aopen that has the 3.5mm plug
=0A=0A(one that goes into the Garmin). Can you explain the lo / hi audio wi
re=0Athing. =0A=0A- In a monophonic audio cable with 3.5 mm plug, the tip
is=0A- connected to the signal/center/hi lead, the sleeve is=0A- conne
cted to the shield/ground/lo lead.=0A=0A- A stereo cable adds another fre
e conductor and the=0A- two signal wires become right and left audio. The
=0A- shield/ground/lo lead still connects to the sleeve.=0A=0A- The lar
ger analogy can be seen on a legacy microphone=0A- connector=0A=0Ahttp://
aeroelectric.com/articles/micjack/micjack.html=0A=0AAm I to understand that
=0A=0Athe lo is to be soldered to the ground? This may be my goof as I=0Ap
urchased this plug (which=0Ais stereo and my intercom is not). I think I ma
y have soldered the two=0Awires to right and left and the ground =0Amight b
e left out in the cold. Will need to double check, but I looked up=0Athe PM
1000 pin-out after I =0Agot home so it may be in the soldering of that plu
g. I purchased the=0Asolderable mini plug in stereo =0Aconfig as I wanted t
o hear the music / alerts in both sides of=0Aheadset.=0A=0A--- I'm co
nfused. If you have stereo headsets, then you=0Awould=0A--- need to i
nstall 3-circuit jacks and tie both r/l=0Aaudio=0A--- from headset to
gether to be treated as a mono=0Aheadset.=0A--- This is the only plac
e you would use a 3-ckt=0Ajack.=0A=0A--- The PM1000 MUSIC IN is monop
honic which would=0Arequired=0A--- blending r/l channels together BEF
ORE wiring the=0Ablend=0A--- into pin 20 and the lo/gnd side to pin 7
.=0A=0A=0A-- =0A=0A=0A-- This would call for a 2-ckt plug to do the
mate up=0Abetween=0A-- the Garmin and the PS1000. And just for grins,
I'd use=0A-- pin 7 of the PS1000 for BOTH audio ground and DC power=0A
-- ground for the Garmin.=0A=0A-- http://tinyurl.com/7ypuofg=0A=0A
=0A-- Unless you have stereo audio to handle, a simple 2-ckt=0Aplug/jac
k=0A-- combination will suffice. The mis-application of the 3-ckt=0Ajac
k=0A-- may indeed be contributing to your problem. =0A- Bob . . .
Message 2
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At 11:39 PM 5/30/2012, you wrote:
I ordered wire ferrules from McMasterCarr for the Pmag connections. See
http://www.mcmaster.com/#lug-terminals/=hrnvdt
Bevan
Hmmmm . . .
Not sure these terminals will add anything useful to the
mating of wires to the pmag. The wire grip in Emagair's
control plugs are designed to grab stranded wire. One
might improve on the grip slightly by combing the strands
out so that they don't over-lap each other in the grip
area.
Having made the electrical connection secure, legacy
termination techniques call for support of the wire+
insulation immediately adjacent to the electrical
connection. This design goal is addressed in Emagair
instructions with use of M21919 padded clamp
as shown.
Emacs!
Adding a device like this . . .
[]
. . . to the end of the wire decreases effectiveness
of the electrical connection. Closing the wire grips down
on 19 strands of wire offers as many as 38 points of
hi-pressure contact with the stranding layup. Crimping a
'pin' on the strands reduces this to 2 points of contact
(maybe 3 if the 'groove' in the pin is flat against a
contact surface.
Therefore, I suggest that more elegant technique is
to follow Emagair instructions as published.
Bob . . .
Message 3
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Good thoughts Bob,
I have been of the opinion (perhaps wrongly) that these type of connections
(found on Pmags) were designed for use with solid wire. If used on finely
stranded wire in a high vibration environment,, wouldn't the sharp pinch
force eventually squish/sever some of the small strands effectively
loosening the contact? Initially. not all the strands can be in contact
with the connector (maybe half at best).
Bevan
_____
From: owner-aeroelectric-list-server@matronics.com
[mailto:owner-aeroelectric-list-server@matronics.com] On Behalf Of Robert L.
Nuckolls, III
Sent: Thursday, May 31, 2012 8:25 AM
Subject: RE: AeroElectric-List: PMAG
At 11:39 PM 5/30/2012, you wrote:
I ordered wire ferrules from McMasterCarr for the Pmag connections. See
http://www.mcmaster.com/#lug-terminals/=hrnvdt
Bevan
Hmmmm . . .
Not sure these terminals will add anything useful to the
mating of wires to the pmag. The wire grip in Emagair's
control plugs are designed to grab stranded wire. One
might improve on the grip slightly by combing the strands
out so that they don't over-lap each other in the grip
area.
Having made the electrical connection secure, legacy
termination techniques call for support of the wire+
insulation immediately adjacent to the electrical
connection. This design goal is addressed in Emagair
instructions with use of M21919 padded clamp
as shown.
Emacs!
Adding a device like this . . .
[]
<http://images1.mcmaster.com/Contents/gfx/large/8009k26p1l.png?ver=10574016>
. . . to the end of the wire decreases effectiveness
of the electrical connection. Closing the wire grips down
on 19 strands of wire offers as many as 38 points of
hi-pressure contact with the stranding layup. Crimping a
'pin' on the strands reduces this to 2 points of contact
(maybe 3 if the 'groove' in the pin is flat against a
contact surface.
Therefore, I suggest that more elegant technique is
to follow Emagair instructions as published.
Bob . . .
Message 4
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At 11:39 AM 5/31/2012, you wrote:
>Good thoughts Bob,
>
>I have been of the opinion (perhaps wrongly) that these type of
>connections (found on Pmags) were designed for use with solid
>wire. If used on finely stranded wire in a high vibration
>environment,, wouldn't the sharp pinch force eventually squish/sever
>some of the small strands effectively loosening the
>contact? Initially. not all the strands can be in contact with the
>connector (maybe half at best).
>
>Bevan
Had a chat with Brad Dement about an hour ago to
confirm validity of my earlier post. Perhaps I can
offer a clarification of the science behind this relatively
new wire termination technology.
Clamping solid wires under screw heads and nuts or between
washers is a legacy technique going back a century or more.
When stranded wire became the material of choice for ease
of installation and vibration resistance, getting a good
clamp under a rotating fastener became problematic. An ol'
gray beard electrician once advised me to put a counter clockwise
twist on strands and them wrap the wire around a stud in a
clockwise direction so that rotational motion of the fasteners
tended to tighten the twist as opposed to unwinding it. This
technique recognized the fact that stranded wire was really
a different animal for achieving enduring connections.
Then folks like AMP, Molex, T&B came along and figured out
ways to crimp a terminal onto a stranded wire in a way that
essentially turned terminal and wire into a single piece
of metal.
But the guys who made a living figuring out ways to connect
wires came up with a new idea which I've illustrated below.
The goal is to make a high pressure, tightly constrained joining
of wire strands (green) with an electrical conductor within
the assembly (red). Design goals included taking both the
screw and the mechanical structure around the joint out of
the current pathway. It would also be nice if the end of
the screw did scrub against the strands during rotation.
Emacs!
What you see above is a generalization of the elegant solution.
Stranded wires are captive within the 'box' along with a large
area conductor driven into intimate contact with the strands
by screw pressure. The end of the screw never touches the
strands. Further, the box around the joint and the screw
are rather robust. Brad tells me that he has put a lot of
torque to these seemingly small screws without stripping
the threads or twisting the head off.
So what appears to be a joining process that favors
solid wire, the technique actually accommodates stranded
wires equally well . . . if not better. The magic happens
by combining high pressure to a constrained bundle of
strands and keeping the numbers of joints in the power
path to a minimum. The forces are less than for a crimped
joint . . . the strands are minimally deformed and certainly
not gas-tight with the red conductor . . . but it's adequate
to the task. No value is added by converting the strands
into a 'solid' conductor.
Pretty slick.
That takes care of electrical issues . . . and in the
stationary environment is probably sufficient. In a high
vibration environment, the installation is not complete until
the bundle coming off the terminal strip is firmly constrained
in a closely co-located clamp.
Bob . . .
Message 5
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Thanks for following up on this Bob
Tim
Message 6
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Subject: | Re: Anyone interested in a 9lb battery/jumpstart kit? |
My check was cashed a month ago.. but I never received anything but
a few emails telling me why nothing had shipped my way.
Has *anyone* actually received anything? I was going to see what shipped, and
maybe order again, based on what I received, but at this point, I'm
pretty much writing this off as a scam, and a lesson learned.
-Jack
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=374436#374436
Message 7
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Subject: | Re: Anyone interested in a 9lb battery/jumpstart |
kit?
At 06:06 PM 5/31/2012, you wrote:
><aviation@comconn.com>
>
>My check was cashed a month ago.. but I never received anything but
>a few emails telling me why nothing had shipped my way.
>
>Has *anyone* actually received anything? I was going to see what
>shipped, and maybe order again, based on what I received, but at
>this point, I'm pretty much writing this off as a scam, and a lesson learned.
Ron has a boat load of these offers to box up
and ship. I think he's been waiting until everyone
who wants one has placed their order so he can
do a one-time shipping effort.
Ron posted a note on the 27th here:
http://www.matronics.com/forums/viewtopic.php?t=89897
wherein he thought he was close to moving a bunch
of lead, plastic and misc goodies out of his
shop!
Bob . . .
Message 8
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Subject: | Re: Anyone interested in a 9lb battery/jumpstart |
kit?
Hi Jack
No scam, everyone will get their stuff. Yours will go out in the next day
or two. It ends up packaging two or three in the Flat Rate box is rather
time consuming. They are also rather heavy so I have only been dropping
off two or three at the post office at a time.
You have my word, if not you can come take away my first born, just mind
he is in college!
I made a post that this is last chance to order,, and I got more orders
from that post than the first posting!
The charge controllers are rather kool. You will get a 500mA 115VAC
transformer to power the charge controller. That I have used a lot and it
works fine. Because I needed to charge a number of batteries for this
last wave, since I have a 200 amp 12V battery on hand, I used it to power
a half dozen charge controllers through the 12 volt input of the charge
controller. Works great, just like using the transformer.
I include in the package a little schematic, but be aware that once the
battery "peaks", you need to unplug the input to get the
holding circuit to reset.
Ron Parigoris
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