Today's Message Index:
----------------------
1. 04:00 AM - Re: ICOM A200 Molex Connector (Bill Maxwell)
2. 07:10 AM - Re: ICOM edge card connector pins (Bordelon, Greg)
3. 08:51 AM - Re: Re: Power Diode Drops (flyv35b)
4. 10:51 AM - Re: ICOM edge card connector pins (Brian Kraut)
5. 11:30 AM - Re: Re: ICOM edge card connector pins (Jim Ziegler)
6. 12:41 PM - Re: Re: Power Diode Drops (Fiveonepw@aol.com)
7. 02:44 PM - the smoke is still in the wires but............... (Steve Sampson)
8. 02:45 PM - Re: Fatwire Super-2-CCA (Robert L. Nuckolls, III)
9. 04:16 PM - Antenna Question (Steve Glasgow)
10. 05:58 PM - Transponder troubleshooting (Wayne Williams)
11. 06:20 PM - Re: Antenna Question (Terry Watson)
12. 08:59 PM - Re: Transponder troubleshooting (steven dinieri)
Message 1
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| Subject: | Re: ICOM A200 Molex Connector |
--> AeroElectric-List message posted by: "Bill Maxwell" <wrmaxwell@bigpond.com>
They are carried as spare parts by Icom, at least here in Oz.
----- Original Message -----
From: "Larry McFarland" <larrymc@qconline.com>
Subject: AeroElectric-List: ICOM A200 Molex Connector
> --> AeroElectric-List message posted by: "Larry McFarland"
<larrymc@qconline.com>
>
> Has anyone a source for the
> pins and Molex connector that are peculiar to the
> ICOM A200 radio? I've been looking and cannot
> seem to find a source for these parts. The install
> manual only alludes to their presence.
>
> Larry McFarland
>
>
Message 2
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| Subject: | ICOM edge card connector pins |
--> AeroElectric-List message posted by: "Bordelon, Greg" <gbordelon@hess.com>
Larry,
I also suggest you gently rub the radio circuit board edge contacts with a green
scotch brite pad. This will remove any oils, oxidation, contamination, etc.
from the board. I did this to my transponder recently and it corrected an intermittent
mode C problem I had been experiencing. The keys words here are "gently
rub".
> -----Original Message-----
> From: owner-aeroelectric-list-server@matronics.com [SMTP:owner-aeroelectric-list-server@matronics.com]
On Behalf Of Larry McFarland
> Sent: Monday, June 07, 2004 7:08 PM
> To: aeroelectric-list@matronics.com
> Subject: AeroElectric-List: ICOM edge card connector pins
>
> --> AeroElectric-List message posted by: "Larry McFarland" <larrymc@qconline.com>
>
>
> Thanks very much for the recent assist,
> After an advised search, the pins and Molex connector used in the
> A200 radio were found and ordered from Mouser.com The plan is to do
> a complete reinstall of these in the radio case mount.
>
> I've spent about several hours getting the fit and expansion of these little
flex-nose
> connectors just right for good contact, but just a little vibration of the wire
> at the pin causes erratic loud or low volume. Doubling ground-contact
> opposites on the edge card is likely as much for contact redundancy as electron
capacity
> because only half each seems to work most of the time. So it's not good enough
> for taxi in my airspace.
>
> If anyone's a better idea, I'd like to hear about it and continue on to first
flight.
> Thanks again,
>
> Larry McFarland - 601HDS @ www.macsmachine.com
>
>
>
>
>
>
Message 3
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| Subject: | Re: Power Diode Drops |
--> AeroElectric-List message posted by: "flyv35b" <flyv35b@ashcreekwireless.com>
Further, anyone running an e-bus load of
> more than 5 amps continuous through ANY diode may be running the wrong
> architecture.
I'm real curious as to the reasoning behind this statement. Why not 10
amps, or even more, to the E-buss if the wiring, diode and fuse, etc. at the
battery are all sized correctly. There are some pretty good reasons why 5
amps may not be enough to operate everything you might need on the E-buss.
Cliff
----- Original Message -----
From: "Robert L. Nuckolls, III" <bob.nuckolls@cox.net>
Subject: Re: AeroElectric-List: Re: Power Diode Drops
> --> AeroElectric-List message posted by: "Robert L. Nuckolls, III"
<bob.nuckolls@cox.net>
>
> At 09:37 PM 6/3/2004 -0400, you wrote:
> >--> AeroElectric-List message posted by: "Eric M. Jones"
<emjones@charter.net>
> >
> >My numbers are similar to Paul's, for the 276-1185 diode bridge I got
from
> >Radio Shack versus the IR 100BGQ-030 Schottky, the numbers are:
> >
> >Load Radio Shack Schottky
> >5A 0.86 Vf 0.32 Vf
> >10A 0.89 0.34
> >11A 0.91 0.35
> >16A 0.94 0.35
> >
> >At any point the Schottky ran far cooler than the RS diode.
> >
> >The energy left in the battery is extremely important. . .
>
>
> This is a moot point. The battery is never used to supply normal
> path current. The only time the diode is in service is while the
alternator
> is running and main bus voltage is 13.8 to 14.6 volts. People keep
> tossing around these gawd-awful power dissipations as significant
> to battery-only endurance when the diode carries no current during
> alternator-out operations. Further, anyone running an e-bus load of
> more than 5 amps continuous through ANY diode may be running the wrong
> architecture.
>
> > One of the techniques
> >that is now being used in battery operated devices is to use circuitry
that
> >jacks up the output voltage to whatever you want while it sucks the
> >batteries flat. Example---a single 1.5 Volt cell drives circuitry that
> >produces 9V in a transistor- battery-sized package with flat discharge
until
> >dead. MUCH greater capacity, MUCH lower cost. Cool....
>
> . . . completely inapplicable in this instance. Battery only ops tie
> all e-bus equipment directly to the battery. E-bus loads should provide
> useful operation down to 10.5 volts (battery capacity less than 5%).
Jacking
> up the parts count to squeeze that last 5% out of the battery is an
> confession to having undersized the battery and/or subjecting it
> to poor preventative maintenance.
>
>
> >So the Schottky can use much more of the energy contained in the battery.
> >That energy is sitting there at a great penalty in weight if you don't
use
> >it. Someone should figure this out--it's probably a pound or more.
> >
> >This is not a case of what Brian calls "angels dancing on the head of a
> >pin". This is not a subtle difference at all.
>
>
> Diode drop and wattage could be important if folks choose
> to use it in a manner for which it was never suggested or intended.
>
> Bob . . .
>
>
Message 4
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| Subject: | ICOM edge card connector pins |
--> AeroElectric-List message posted by: "Brian Kraut" <brian.kraut@engalt.com>
I recommend a pencil eraser instead. Again, lightly.
Brian Kraut
Engineering Alternatives, Inc.
www.engalt.com
-----Original Message-----
From: owner-aeroelectric-list-server@matronics.com
[mailto:owner-aeroelectric-list-server@matronics.com]On Behalf Of
Bordelon, Greg
Subject: RE: AeroElectric-List: ICOM edge card connector pins
--> AeroElectric-List message posted by: "Bordelon, Greg"
<gbordelon@hess.com>
Larry,
I also suggest you gently rub the radio circuit board edge contacts with a
green scotch brite pad. This will remove any oils, oxidation, contamination,
etc. from the board. I did this to my transponder recently and it corrected
an intermittent mode C problem I had been experiencing. The keys words here
are "gently rub".
> -----Original Message-----
> From: owner-aeroelectric-list-server@matronics.com
[SMTP:owner-aeroelectric-list-server@matronics.com] On Behalf Of Larry
McFarland
> Sent: Monday, June 07, 2004 7:08 PM
> To: aeroelectric-list@matronics.com
> Subject: AeroElectric-List: ICOM edge card connector pins
>
> --> AeroElectric-List message posted by: "Larry McFarland"
<larrymc@qconline.com>
>
>
> Thanks very much for the recent assist,
> After an advised search, the pins and Molex connector used in the
> A200 radio were found and ordered from Mouser.com The plan is to do
> a complete reinstall of these in the radio case mount.
>
> I've spent about several hours getting the fit and expansion of these
little flex-nose
> connectors just right for good contact, but just a little vibration of the
wire
> at the pin causes erratic loud or low volume. Doubling ground-contact
> opposites on the edge card is likely as much for contact redundancy as
electron capacity
> because only half each seems to work most of the time. So it's not good
enough
> for taxi in my airspace.
>
> If anyone's a better idea, I'd like to hear about it and continue on to
first flight.
> Thanks again,
>
> Larry McFarland - 601HDS @ www.macsmachine.com
>
>
Message 5
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| Subject: | Re: ICOM edge card connector pins |
--> AeroElectric-List message posted by: Jim Ziegler <jamescraigziegler@adelphia.net>
A pencil eraser works well for this also.
>
> From: "Bordelon, Greg" <gbordelon@hess.com>
> Date: 2004/06/08 Tue AM 10:08:51 EDT
> To: <aeroelectric-list@matronics.com>
> Subject: RE: AeroElectric-List: ICOM edge card connector pins
>
>
--
jim Ziegler <jamescraigziegler@adelphia.net>
Message 6
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| Subject: | Re: Power Diode Drops |
--> AeroElectric-List message posted by: Fiveonepw@aol.com
> Further, anyone running an e-bus load of
> > more than 5 amps continuous through ANY diode may be running the wrong
> > architecture.
>
> I'm real curious as to the reasoning behind this statement. Why not 10
> amps, or even more, to the E-buss if the wiring, diode and fuse, etc. at the
> battery are all sized correctly. There are some pretty good reasons why 5
> amps may not be enough to operate everything you might need on the E-buss.
>>>>>>>>>>>>>>>>>>
I'll take a stab- consider that many use a 17 Ah battery (mine is 20) and
carry around 40 gal. of gas burning 8 gal/hr (YMMV!). So starting with a
healthy, fully charged batt (which it won't be if you just cranked your engine)
and
full fuel on a four hour flight, you start out with about the same amount of
juice in gas and amp tanks both. Assume approx. 1 amp CONTINUOUS load on
average from stuff like comm, xpndr/enc., engine monitor etc. Now, if you lost
your amp replacer as soon as you get to altitude, you should be able to get to
original destination with minimum perspiration and no diversion. If IMC, better
amend your flight plan if you ain't packing the amps for it........
I did a lot of wrestling with what went on the E-buss (call it essential or
endurance, maybe should be called EE-buss!) for my day/nite VFR ship, but
considering the above rationale, it made the choices a whole lot easier. Nuckolls
repeats the mantra over and over in the Connection and here on the A-list, and
every time I'd try to do an end run around it I'd come back to the same
place. I devoted maybe 3 years total on my electrical system design and execution-
Bob has spent a lifetime doing them and I'm not smart enough to argue with
him! Maybe just smart enough to listen! 8-)
$.02 From The PossumWorks in TN
Mark -6A "Xpdnc", Z-11 (mostly), Lycoming on mags, flying 75 hours
Message 7
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| Subject: | the smoke is still in the wires but............... |
--> AeroElectric-List message posted by: "Steve Sampson" <SSampson.SLN21@london.edu>
I have wired up the VANS supplied ND alternator as described in Z-24.
If I put the master to the position that would bring the alternator online
if the engine was running, the 5Amp OV breaker pops. Is it reasonable for
the field windings to draw more than 5 Amps when the altenator is not
turning? (The OV Protection module is not the culprit since if I pull the
plug with the excitation out of the altrernator, no problem.)
Thanks Steve.
---
Message 8
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| Subject: | Re: Fatwire Super-2-CCA |
--> AeroElectric-List message posted by: "Robert L. Nuckolls, III" <bob.nuckolls@cox.net>
At 10:18 AM 6/7/2004 -0400, you wrote:
>--> AeroElectric-List message posted by: "Eric M. Jones" <emjones@charter.net>
>
>Bob,
>
>You should have a piece of this and I would welcome your testing it.
>
>A couple of things: I had hoped the cable with insulation would come it at
>under 3 oz/ft, but it is 3.08 oz/ft. But this is still far below the
>lightest possible AWG 2 copper cable. On the other hand, quite remarkably,
>the resistance came in MUCH lower than expected, at 0.134 milliohms per foot
>*. Copper AWG 2 is 0.156 milliohms per foot. Even SILVER AWG 2 is 0.144
>milliohm per foot.
>
>We studied insulations for the wire. Some insulation would have made the
>wire unaffordable. Other types were unsuitable for various reasons. In the
>end only PVC made sense. I think it's time to say that PVC insulation is not
>the same stuff they made in the 1950's and is superior in all the
>characteristics that make good insulation. All the wiring in your house is
>insulated with PVC. This insulation is rated VW-1 but is actually
>self-extinguishing in the thickness used on the cable. It's environmentally
>friendly and very good stuff.
>
>We'll see how this goes.
>
>Regards,
>Eric M. Jones
>www.PerihelionDesign.com
>113 Brentwood Drive
>Southbridge MA 01550-2705
>Phone (508) 764-2072
>Email: emjones@charter.net
>
>*The manufacturer measured a single strand and calculated up to the full
>bundle, I performed the actual voltage drop/current measurement. The results
>are the same within the measurement error. Physics is physics but a small
>change in core-clad ratio or aluminum purity is probably responsible for
>this.
Eric,
Looks good. Have you considered discounting quantities to other
dealers? Stein Bruch at steinair.com sells a TON of wire and wiring
supplies. I think he also does custom cable assemblies. It wouldn't
hurt to drop him a note and introduce yourself. I've carbon-copied him
on this note.
Bob . . .
-----------------------------------------
( Experience and common sense cannot be )
( replaced with policy and procedures. )
( R. L. Nuckolls III )
-----------------------------------------
Message 9
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| Subject: | Antenna Question |
--> AeroElectric-List message posted by: "Steve Glasgow" <willfly@carolina.rr.com>
I=92m an RV8 guy looking for a way to use the exterior comm antenna for my 300XL
as the antenna for my ICOM (handheld) should the 300XL comm fail.
I=92m wondering about using a BNC bulkhead connector under the panel, connecting
the antenna wire running directly from the main antenna to one side and connecting
the 300XL to the other. This would effectively, create a splice in the
main antenna wire with the BNC bulkhead connector.
In the event of a failure of the 300XL, I could disconnect the 300XL side and hook
up the ICOM (handheld) antenna in its place.
Would there be signal strength losses to 300XL?
Could this plan work?
Comments please!
Steve Glasgow
Message 10
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| Subject: | Transponder troubleshooting |
--> AeroElectric-List message posted by: "Wayne Williams" <rwayne@gamewood.net>
Can anyone suggest a procedure for troubleshooting a transponder? I have a
new Garmin GTX327 installed in an all metal airplane (RV8A) and everything
looks like it is working great, but ATC has trouble "seeing" it. I need to
be very close as if its a weak signal. The reply light is showing numerous
regular replies so the receiving end seems to be working fine. I've replaced
the coax and connectors. Suggestions?? Thanks!
Wayne Williams
RV8A
Danville, VA
Message 11
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| Subject: | Antenna Question |
--> AeroElectric-List message posted by: "Terry Watson" <terry@tcwatson.com>
Steve,
Here's a link to Bob's article about a little box you can build to switch
the antenna to your hand-held:
http://aeroelectric.com/articles/commtap/commtap.html
Terry
-----Original Message-----
From: owner-aeroelectric-list-server@matronics.com
[mailto:owner-aeroelectric-list-server@matronics.com]On Behalf Of Steve
Glasgow
Subject: AeroElectric-List: Antenna Question
--> AeroElectric-List message posted by: "Steve Glasgow"
<willfly@carolina.rr.com>
I=92m an RV8 guy looking for a way to use the exterior comm antenna for my
300XL as the antenna for my ICOM (handheld) should the 300XL comm fail.
I=92m wondering about using a BNC bulkhead connector under the panel,
connecting the antenna wire running directly from the main antenna to one
side and connecting the 300XL to the other. This would effectively, create
a splice in the main antenna wire with the BNC bulkhead connector.
In the event of a failure of the 300XL, I could disconnect the 300XL side
and hook up the ICOM (handheld) antenna in its place.
Would there be signal strength losses to 300XL?
Could this plan work?
Comments please!
Steve Glasgow
Message 12
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| Subject: | Transponder troubleshooting |
--> AeroElectric-List message posted by: "steven dinieri" <capsteve@adelphia.net>
I have the same transponder and experience intermittent complaints from
atc as well. Its in a 6A and I've checked everything 'cept sending the
unit out for repair.
Steve
Can anyone suggest a procedure for troubleshooting a transponder? I have
a
new Garmin GTX327 installed in an all metal airplane (RV8A) and
everything
looks like it is working great, but ATC has trouble "seeing" it. I need
to
be very close as if its a weak signal. The reply light is showing
numerous
regular replies so the receiving end seems to be working fine. I've
replaced
the coax and connectors. Suggestions?? Thanks!
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