Today's Message Index:
----------------------
0. 12:25 AM - What Listers Have Been Saying (Matt Dralle)
1. 08:06 AM - Failed Contactor? (Emrath)
2. 08:16 AM - Re: RFI problem (Tom Barter)
3. 09:20 AM - Re: Failed Contactor? (Robert L. Nuckolls, III)
4. 03:02 PM - Re: E-Bus Alternate Switch (Henry Trzeciakowski)
5. 03:59 PM - Circuit lesson (Emrath)
6. 03:59 PM - Re: Failed contactor (Emrath)
7. 08:37 PM - Re: Circuit lesson (Charlie England)
Message 0
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| Subject: | What Listers Have Been Saying |
Wow! Many of the members making a List Support Contribution this year have been
using the Comments field to leave a personal message about the Lists. Thank
you! I have included a number of them below. Please read over a few and see
if you perhaps can echo some of the same sentiments regarding the value of the
Lists to you...
There is only a couple more days left for this year's List Fund Raiser and we're
still way behind previous years. If you've been waiting until the last minute
to show your support, Now is the Time! Please make your Contribution and pick
up a great gift at the same time!
By Credit Card or Paypal:
http://www.matronics.com/contribution
or By Personal Check:
Matronics / Matt Dralle
PO Box 347
Livermore, CA 94550-7227
Thank you in advance!!
Matt Dralle
Email List and Forums Administrator
Here is some of the great feedback members have been including along with their
personal Contributions this year...
Over the years, the info I have received from the RV-List has
saved me thousands of dollars, and dozens of hours of time by
helping me avoid bad purchases, pointing me at vendors with
low prices and excellent support, and providing solutions to
the typical head scratchers that you run into.
Kevin H
Valuable service. Best List(s) on the Internet!
George A
Please accept this token not as an indicator of what
this list has been worth to me this past year.
Lew G
Great information and entertainment.
Tim V
Thanks again for another great year of service. This
project would be beyond me if it were not for the list.
Moreover, the friendships I have found are worth their
weight in GOLD!
Robert B
Great support you provide to all the subscribers!
Freddie H
Read it every day.
PF B
Thanks for your excellent management of the Matronics
Lists! Your services are head and shoulders above the
rest.
James M
Without the "List", there would be no Kolb "community".
Bill T
Thanks, Matt, for a great service! I've been monitoring
and using the lists since 1999.
Richard D
Thanks for such a terrific site and for all the work and
effort you put into it.
John R
A great service year after year.
John D
..another year of fantastic service.
Jerry B
This list is a great resource.
Arden A
Great list.
James M
Lists were a great help while building HRII N561FS.
John S
Great resources for both the beginner and experienced.
George R
Good service.
Gary G
The List is an invaluable resource!
William C
AeroElectric list is a great source of info and learning!
Janice J
Thank you, Matt for being there for us making it all happen
on the List for so many years - Great JOB!
Sam S
Thank you for providing a great venue. You definitely hit
the nail on the head with your solicitation asking if
readers look forward to receiving the email digests. I
certainly do and when I move from a dreamer to a builder, I
expect the anticipation will only increase.
Joe S
Thanks for a Perfect working list.
Hans-Peter R
Great List
Bryan K
Such a great selection of valuable forums!
David G
Nice job!
Walt E
Good resource...
Robert P
Thank you for another great year!
Scott S
I could not do this without you...
Robert D
I believe I've been a list member for over a decade
now. Thanks for the service!
Tim L
Great List
Hendrik W
Message 1
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| Subject: | Failed Contactor? |
I was demonstrating my newly wired panel for family this weekend and the
contractor mysteriously dropped off line. I had my battery charger
connected to the battery and system voltage was 13.3v DC. When the master
is OFF, I'm seeing .5v between the two small contactor terminal with the
diode removed and zero volts when the master is ON, yet contactor will not
activate. All other external wiring checks out and the contractor is wired
per the B&C web site. System has been working fine up until now, any one
have ideas as to what has happened? Did the Contactor suddenly go bad?
Marty RV6A
Brentwood TN getting ready to paint!
Message 2
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Bob,
I need to get 5-10 feet outside of the building before the reception clears
up.
Tom Barter
-----Original Message-----
From: owner-aeroelectric-list-server@matronics.com
[mailto:owner-aeroelectric-list-server@matronics.com] On Behalf Of Robert L.
Nuckolls, III
Sent: Friday, November 28, 2008 7:24 PM
Subject: Re: AeroElectric-List: RFI problem
<nuckolls.bob@cox.net>
At 06:19 PM 11/28/2008, you wrote:
>Bob and all,
>
>I recently upgraded the lighting in the shop where my airplane is
>under construction from the 20+ year old, 8 foot fluorescent
>fixtures to the newer, more energy efficient type with electronic
>ballasts. The light is much better, and that irritating audible hum
>that the old lights made is gone. However, all radio reception and
>the lower TV channels are gone too, now nothing but static. Both
>the radio and TV are connected to an outside antenna via RG6
>coax. Someone at an electronics store suggested that replacing the
>existing coax with RG6 Quad Shield in from the antenna would solve
>the problem. I am not familiar with this product. Any thoughts? I
>rather miss having the radio on while working on the plane.
>
>Regards,
>
My best guess is that the ballasts were not filtered
to control the effects of radiation from the tubes.
I've heard of this before. The 8' tubes make really
good antennas for radiating the noise. Additional
shielding of the feedline to your radios is unlikely
to make any difference. Try a hand-held AM/FM radio
and see how far you have to move away from the lights
to get unaffected reception.
Bob . . .
----------------------------------------)
( . . . a long habit of not thinking )
( a thing wrong, gives it a superficial )
( appearance of being right . . . )
( )
( -Thomas Paine 1776- )
----------------------------------------
Checked by AVG - http://www.avg.com
8:17 AM
Message 3
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| Subject: | Re: Failed Contactor? |
At 10:02 AM 11/29/2008, you wrote:
>
>I was demonstrating my newly wired panel for family this weekend and the
>contractor mysteriously dropped off line. I had my battery charger
>connected to the battery and system voltage was 13.3v DC. When the master
>is OFF, I'm seeing .5v between the two small contactor terminal with the
>diode removed and zero volts when the master is ON, yet contactor will not
>activate. All other external wiring checks out and the contractor is wired
>per the B&C web site. System has been working fine up until now, any one
>have ideas as to what has happened? Did the Contactor suddenly go bad?
The contactor will not operate until voltage between the two
small terminals exceeds 8 volts or so. The voltages you
cited for the two positions of the master switch were at or
near zero. This means that the jumper between the fat battery
terminal and the small coil terminal is open . . . or the
wiring between the other small terminal through the master
to ground has gone open.
Bob . . .
----------------------------------------)
( . . . a long habit of not thinking )
( a thing wrong, gives it a superficial )
( appearance of being right . . . )
( )
( -Thomas Paine 1776- )
----------------------------------------
Message 4
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| Subject: | Re: E-Bus Alternate Switch |
Bob:
In your Z-32 Diagram, you use a 1-3 Switch - Is this a B&C S700-1-3: Single
Pole-Double Throw ???
My second question is:
I have a Honeywell 1TL-1-2D (MS24658-22D) - Locking Single Pole-Single
Throw that I purchased from Digi-Key and I'm wondering if that would work in
place of the 1-3 ? If it can, then this switch has 2 terminals: #2 &
#3..... (NO #1)....would I wire the ground to #2 and 22g from the relay to
#3...........or do I really need to order a SPDT ?
Thanks
Henry Trzeciakowski
Pittsburgh, Pa.
Message 5
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Bob,
Why do we feed power to the starter contactor thru the master contactor?
Could one run a short hot lead from the always hot terminal on the master
contactor to the starter contactor. Thus eliminating the voltage drop and
stress on the master contactor when starting. Interested in your comments.
Marty RV-6A Brentwood TN
Message 6
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| Subject: | re: Failed contactor |
Bob:
I disconnected the diode between the terminals. With the master off, I read
on my Fluke meter 13.34 VDC on the terminal fed from the jumper to the fat
battery terminal. The other terminal with the ground lead to the master
switch reads 0.47 VDC with the master off. With the master switch on,
voltage between the two small terminals reads 13.34 VDC. I checked the
continuity of the master wire and switch to ground and it works fine. I also
disconnected everything and get an open circuit reading between the two
small terminals, no resistance and no short circuit warning on my Fluke. If
you ask me, the small internal coil on the contractor has failed open. Does
this seem possible with a new contactor?
Marty
Subject: Re: Failed Contactor?
From: Robert L. Nuckolls, III (nuckolls.bob@cox.net)
At 10:02 AM 11/29/2008, you wrote:
>
>I was demonstrating my newly wired panel for family this weekend and the
>contractor mysteriously dropped off line. I had my battery charger
>connected to the battery and system voltage was 13.3v DC. When the master
>is OFF, I'm seeing .5v between the two small contactor terminal with the
>diode removed and zero volts when the master is ON, yet contactor will not
>activate. All other external wiring checks out and the contractor is wired
>per the B&C web site. System has been working fine up until now, any one
>have ideas as to what has happened? Did the Contactor suddenly go bad?
The contactor will not operate until voltage between the two
small terminals exceeds 8 volts or so. The voltages you
cited for the two positions of the master switch were at or
near zero. This means that the jumper between the fat battery
terminal and the small coil terminal is open . . . or the
wiring between the other small terminal through the master
to ground has gone open.
Bob . . .
Marty
Message 7
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| Subject: | Re: Circuit lesson |
Emrath wrote:
>
> Bob,
> Why do we feed power to the starter contactor thru the master contactor?
> Could one run a short hot lead from the always hot terminal on the master
> contactor to the starter contactor. Thus eliminating the voltage drop and
> stress on the master contactor when starting. Interested in your comments.
>
> Marty RV-6A Brentwood TN
I'm not Bob, but the master contactor is a backup disconnect if the
starter contactor fails 'on'. It makes it possible to kill all
electrical energy from the battery except the (hopefully short) run from
the battery + to the master contactor. (Except the 'endurance bus, of
course.)
Charlie
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