Today's Message Index:
----------------------
1. 06:07 AM - Out of town . . . (Robert L. Nuckolls, III)
2. 06:07 AM - alternator testing (Robert L. Nuckolls, III)
3. 06:27 AM - Re: Radio Shack Noise Filter 272-1085 (Eric M. Jones)
4. 06:52 AM - Re: 24v starter 14 volt system drawing (Mark & Lisa)
5. 06:53 AM - Voltage stability (Brian Cross)
6. 07:36 AM - Re: Voltage stability (Denis Walsh)
7. 07:39 AM - Re: Voltage stability (Kevin Horton)
8. 07:58 AM - Re: PTT and Trim Indicator Problem From: "John (Charlie Brame)
9. 11:28 PM - lockwashers on Odyssey battery terminals? (czechsix@juno.com)
10. 11:31 PM - Official Usage Guideline [Please Read] [Monthly Posting] (dralle@matronics.com)
Message 1
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| Subject: | Out of town . . . |
--> AeroElectric-List message posted by: "Robert L. Nuckolls, III" <nuckollsr@cox.net>
Headed to Denver for a BIG family reunion. Don't know if
my motel is wi-fi'ed or not. Might be able to check in but
it's possible that I'm off line until Monday.
See ya!
Bob . . .
--------------------------------------------------------
< Throughout history, poverty is the normal condition >
< of man. Advances which permit this norm to be >
< exceeded -- here and there, now and then -- are the >
< work of an extremely small minority, frequently >
< despised, often condemned, and almost always opposed >
< by all right-thinking people. Whenever this tiny >
< minority is kept from creating, or (as sometimes >
< happens) is driven out of a society, the people >
< then slip back into abject poverty. >
< >
< This is known as "bad luck". >
< -Lazarus Long- >
<------------------------------------------------------>
http://www.aeroelectric.com
Message 2
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| Subject: | alternator testing |
--> AeroElectric-List message posted by: "Robert L. Nuckolls, III" <nuckollsr@cox.net>
Jack Eckdahl was wrestling with an alternator problem earlier
this week and I published some testing ideas. I'd forgotten
about a document I published some time ago and was already
posted. Jack, see:
http://www.aeroelectric.com/articles/Alternators/Alternator_Test.pdf
Bob . . .
--------------------------------------------------------
< Throughout history, poverty is the normal condition >
< of man. Advances which permit this norm to be >
< exceeded -- here and there, now and then -- are the >
< work of an extremely small minority, frequently >
< despised, often condemned, and almost always opposed >
< by all right-thinking people. Whenever this tiny >
< minority is kept from creating, or (as sometimes >
< happens) is driven out of a society, the people >
< then slip back into abject poverty. >
< >
< This is known as "bad luck". >
< -Lazarus Long- >
<------------------------------------------------------>
http://www.aeroelectric.com
Message 3
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| Subject: | RE: Radio Shack Noise Filter 272-1085 |
--> AeroElectric-List message posted by: "Eric M. Jones" <emjones@charter.net>
--> AeroElectric-List message posted by: Walter Klatt <wklatt@yahoo.com>
Walter
If you find one, that's fine, but I suggest that you can get one that works
even better. These particular filters were often used to filter line noise
in automobiles, and they appealed to the big boom-box installers, so maybe
Tandy's vendor even improved on them.
You can call these guys---they might set you up with their own version:
http://www.jmkfilters.com/catalog/auto.htm
Regards,
Eric M. Jones
www.PerihelionDesign.com
113 Brentwood Drive
Southbridge MA 01550-2705
Phone (508) 764-2072
Email: emjones@charter.net
"Everything you've learned in school as "obvious" becomes
less and less obvious as you begin to study the universe.
For example, there are no solids in the universe. There's
not even a suggestion of a solid. There are no absolute con-
tinuums. There are no surfaces. There are no straight lines."
- R. Buckminster Fuller
Message 4
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| Subject: | RE: 24v starter 14 volt system drawing |
--> AeroElectric-List message posted by: "Mark & Lisa" <marknlisa@hometel.com>
Bob,
You said:
> A hand full of resistors and a couple of LEDS (need two in order
> to sense both stuck-hi and stuck-lo faults) will bias up the
> aux battery and 4 contactors to 1/2 of battery voltage. When
Are these 12V LEDs? Some LEDs advertised as "indicators" are sold with a
panel mount housing and billed as "12V."
http://rocky.digikey.com/WebLib/Chicago%20Miniature/Web%20Data/5110F%20Serie
s.pdf
These come with a current limiting resistor included. Can I use these
indicators?
Mark & Lisa Sletten
Legacy FG N828LM
http://www.legacyfgbuilder.com
Message 5
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| Subject: | Voltage stability |
--> AeroElectric-List message posted by: Brian Cross <bcross2160@rogers.com>
Hi Folks
I have a problem on my aircraft which I have had from day one since I got
it flying over 5 years ago. It uses Bob N's circuit diagram to a T. I
cannot remember which Z diagram it is but it is a basic system with 2 mags,
E bus with the diode etc. I use the LR3B voltage regulator & B & C 40 amp
alternator. The system has never let me down. I have a friend who helped
me wire the system who has his masters in Elect. Eng. & a very bright guy.
The problem is that I have low voltage in the system. As I had load to the
system, the voltage as shown by the EI gauges drops. For example, if I
turn on the taxi light, it drops 0.1-0.2 volts. Every time I add a load,
it drops by this amount. It is quite easy to get it down to 12.8-12.9
volts depending upon how much load I had. When I take the load off, the
voltage climbs right back to 13.9 volts or so. Yes I have verified the
voltage with other external devices, & my Garmin handheld indicates exactly
the same voltage as the EI unit.
I have followed the LR3B trouble shooting guide & found no problems. I
have contacted B&C over the phone & at Oshkosh. They are very nice folks
but have been unable to help me. (I am not saying at all that it is their
problem, I just cannot figure it out). I have tightened the belt, changed
the alt. belt etc. etc. to no avail. I just swapped out the LR3B last
night to a brand new LR3C with high hopes. The system performs exactly as
before.
Perplexed! Greatly appreciate any help.
Brian
Message 6
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| Subject: | Re: Voltage stability |
--> AeroElectric-List message posted by: Denis Walsh <denis.walsh@comcast.net>
That's what I thought it was supposed to do.
Eagerly awaiting knowledgeable answers.
Denis Walsh
On Jul 1, 2005, at 7:53 AM, Brian Cross wrote:
> --> AeroElectric-List message posted by: Brian Cross
> <bcross2160@rogers.com>
>
> Hi Folks
>
> I have a problem on my aircraft which I have had from day one since
> I got
> it flying over 5 years ago. It uses Bob N's circuit diagram to a
> T. I
> cannot remember which Z diagram it is but it is a basic system with
> 2 mags,
> E bus with the diode etc. I use the LR3B voltage regulator & B &
> C 40 amp
> alternator. The system has never let me down. I have a friend who
> helped
> me wire the system who has his masters in Elect. Eng. & a very
> bright guy.
>
> The problem is that I have low voltage in the system. As I had
> load to the
> system, the voltage as shown by the EI gauges drops. For example,
> if I
> turn on the taxi light, it drops 0.1-0.2 volts. Every time I add a
> load,
> it drops by this amount. It is quite easy to get it down to 12.8-12.9
> volts depending upon how much load I had. When I take the load
> off, the
> voltage climbs right back to 13.9 volts or so. Yes I have verified
> the
> voltage with other external devices, & my Garmin handheld indicates
> exactly
> the same voltage as the EI unit.
>
> I have followed the LR3B trouble shooting guide & found no
> problems. I
> have contacted B&C over the phone & at Oshkosh. They are very nice
> folks
> but have been unable to help me. (I am not saying at all that it
> is their
> problem, I just cannot figure it out). I have tightened the belt,
> changed
> the alt. belt etc. etc. to no avail. I just swapped out the LR3B last
> night to a brand new LR3C with high hopes. The system performs
> exactly as
> before.
>
> Perplexed! Greatly appreciate any help.
>
> Brian
>
>
Message 7
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| Subject: | Re: Voltage stability |
--> AeroElectric-List message posted by: Kevin Horton <khorton01@rogers.com>
On 1 Jul 2005, at 09:53, Brian Cross wrote:
> --> AeroElectric-List message posted by: Brian Cross
> <bcross2160@rogers.com>
>
> Hi Folks
>
> I have a problem on my aircraft which I have had from day one since
> I got
> it flying over 5 years ago. It uses Bob N's circuit diagram to a
> T. I
> cannot remember which Z diagram it is but it is a basic system with
> 2 mags,
> E bus with the diode etc. I use the LR3B voltage regulator & B &
> C 40 amp
> alternator. The system has never let me down. I have a friend who
> helped
> me wire the system who has his masters in Elect. Eng. & a very
> bright guy.
>
> The problem is that I have low voltage in the system. As I had
> load to the
> system, the voltage as shown by the EI gauges drops. For example,
> if I
> turn on the taxi light, it drops 0.1-0.2 volts. Every time I add a
> load,
> it drops by this amount. It is quite easy to get it down to 12.8-12.9
> volts depending upon how much load I had. When I take the load
> off, the
> voltage climbs right back to 13.9 volts or so. Yes I have verified
> the
> voltage with other external devices, & my Garmin handheld indicates
> exactly
> the same voltage as the EI unit.
>
> I have followed the LR3B trouble shooting guide & found no
> problems. I
> have contacted B&C over the phone & at Oshkosh. They are very nice
> folks
> but have been unable to help me. (I am not saying at all that it
> is their
> problem, I just cannot figure it out). I have tightened the belt,
> changed
> the alt. belt etc. etc. to no avail. I just swapped out the LR3B last
> night to a brand new LR3C with high hopes. The system performs
> exactly as
> before.
>
Brian,
Where does the EI gauge read its voltage? Main Bus, E-Bus, or
somewhere else?
Where does the voltage regulator get its voltage signal? Main Bus, E-
Bus, or somewhere else?
If the voltage regulator is sensing voltage from a different location
than the EI gauge is reading, what happens if you temporarily wire up
a voltmeter to read voltage from the same place that the voltage
regulator is hooked to? What happens to the voltage at this location
as you add load?
Where is the EI gauge grounded?
Where is the voltage regulator grounded?
Kevin Horton RV-8 (finishing kit)
Ottawa, Canada
http://www.kilohotel.com/rv8
Message 8
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| Subject: | Re: PTT and Trim Indicator Problem From: "John |
Schroeder"
--> AeroElectric-List message posted by: Charlie Brame <chasb@satx.rr.com>
John,
Thanks for the reply.
I wasn't specific in my original post, but my trim and flap indicator
dimmer circuit is connected between a "master dimmer switch" and the
reostat, exactly as recommended by Ray Allen.
I talked to Ray Allen who confirmed it is a Radio Frequency problem and
fairly common. He seemed to think my indicators reacted more than most.
He had no suggestions other than to make sure the radio antenna lead was
separated from the trim cable as far as possible. He also suggested the
problem should lessen once the airplane was in the air or if the
airplane was outside the hangar/garage and well away from metal
buildings or other reflective surfaces. I'll test that option in a few
days.
My trim cable is a Ray Allen cable which is not shielded. Ray Allen
conceded that a shielded cable might help.
I'm still looking for a better answer.
Charlie
> Time: 06:07:00 PM PST US
> Subject: Re: AeroElectric-List: PTT and Trim Indicator Problem
> From: "John Schroeder"
>
> --> AeroElectric-List message posted by: "John Schroeder"
>
>
> On Thu, 30 Jun 2005 17:02:04 -0500, Charlie Brame
> wrote:
>
> > Both indicators are wired into my panel lights reostat and both dim
> > appropriately when the reostat is
> > moved from the OFF position.
>
> Charlie -
>
> We have the same problem with our flap, yaw & pitch trim indicators. They
> dim and go full to one side or the other when we transmit.
> So far, we do not seem to have any spurious input to the trim motors
> themselves.
>
> One thing that you may be doing wrong is that you have the indicators
> being dimmed by a dimmer. I believe the Ray Allen installation diagrams
> show a direct connection from a light switch to the trim indicators, such
> that it takes 12 volts directly to dim the circuits. There is also only
> one dim position. I thought this was a real stupid way to have dimming on
> the indicators (they really need dimming), so I called Ray Allen. They
> said that you should not connect their indicators to a dimmer.
>
> Having said this, I still think they have a dumb system, so please check
> with them to verify again what they told me. Let me know what they say.
>
> I would also be interested in what they recommend to keep the radio from
> causing the lights to dim and move.
>
> Cheers,
>
> John
>
>
> > THE PROBLEM: When pushing either PTT button, both the trim and flap
> > indicators dim and the trim indicator instantly shows full > down
> > trim (the actual trim does not move.) Releasing the PTT button causes
> > both indicators to return to normal. Other than the > power bus and
> > the common ground point, I can find no area where the two systems meet,
> > cross, or interconnect. I assume the > problem is caused by RF
> > interference but I am clueless as to how to find, much less correct, the
> > problem.
>
Message 9
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| Subject: | lockwashers on Odyssey battery terminals? |
--> AeroElectric-List message posted by: czechsix@juno.com
Ok, ignorant question....does anybody see a need to add a lockwasher to
the battery terminal bolts? My PC-680 battery just came with a plain
washer for each bolt, but no lockwasher. Seems like everything else on
an airplane uses some sort of lockwasher, cotter pin, or self locking
nut, so I'm wondering if this is an exception? No point in adding it if
it ain't needed though....
--Mark Navratil
Cedar Rapids, Iowa
RV-8A N2D....light's getting brighter at the end of the tunnel....moving
to the airport in two weeks....
Message 10
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| Subject: | Official Usage Guideline [Please Read] [Monthly Posting] |
DNA: do not archive
--> AeroElectric-List message posted by: dralle@matronics.com
Dear Lister,
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AeroElectric-List FAQ including these Usage Guidelines can be found at the
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Matt Dralle
Matronics Email List Administrator
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