Today's Message Index:
----------------------
1. 07:11 AM - Re: dimmer circuit (Gary Liming)
2. 09:57 AM - Re: Diode failures and "Reliable Systems" (Robert L. Nuckolls, III)
3. 10:19 AM - Re: dimmer circuit (LarryRobertHelming)
4. 10:34 AM - Re: XPDR antenna question (Robert L. Nuckolls, III)
5. 10:37 AM - Re: dimmer circuit (Bruce Gray)
6. 10:40 AM - Re: KA-25 hummmmmmmmmm . . . (Robert L. Nuckolls, III)
7. 12:13 PM - Re: XPDR antenna question (Gilles.Thesee)
8. 01:31 PM - Crimp tool metric an AWG (Werner Schneider)
9. 01:56 PM - Re: XPDR antenna question (Robert L. Nuckolls, III)
10. 02:47 PM - Re: XPDR antenna question (Gilles.Thesee)
11. 04:38 PM - Re: XPDR antenna question (Robert L. Nuckolls, III)
12. 04:42 PM - Re: Crimp tool metric an AWG (Robert L. Nuckolls, III)
13. 05:53 PM - Re: dimmer circuit (Mark Phillips)
14. 08:32 PM - Re: Microair Radio-Xpdr Wire Harness (Robert L. Nuckolls, III)
Message 1
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
| Subject: | Re: dimmer circuit |
--> AeroElectric-List message posted by: Gary Liming <gary@liming.org>
There is a neat dimmer kit you might want to look at with 3 channels (three
separate outputs all slaved to a master control) with several other options
described in the June 2003 Custom Planes. The kit is also available from
A&T Labs at
http://www.a-and-t-labs.com/
I have the kit assembled and it looks pretty good - silk screened plated
thru holes on the PC board, etc. The price varies as you only have to pay
for what features you use.
Gary Liming
At 04:48 PM 5/27/2003 -0600, you wrote:
>--> AeroElectric-List message posted by: "Jim Pack" <jpack@igs3.com>
>
>Perhaps I have put the cart before the horse, but I would like to make a
>dimmer circuit for my annunciator panel (Which has already been cut into my
>panel).
Message 2
| INDEX | Back to Main INDEX |
| PREVIOUS | Skip to PREVIOUS Message |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
| Subject: | Re: Diode failures and "Reliable Systems" |
--> AeroElectric-List message posted by: "Robert L. Nuckolls, III" <bob.nuckolls@cox.net>
At 10:15 PM 5/27/2003 -0500, you wrote:
>--> AeroElectric-List message posted by: "David Carter"
><dcarter@datarecall.net>
>
>Bob responded "excellently" to David Carter's story about a diode failure,
>then asked the question at the end:
>
> > Going back to the 2-cent diode bringing down $millions$ worth of
>equipment. How is this anecdote relevant to how a $5 diode
> > is bolted to your airplane?
> >
> > Bob . . .
>
>David replies: The diode in Z13 that passes Main bus power to E-bus isn't
>relevant to the million dollar anecdote - and poses zero threat to my
>airplane.
>
>Since I sent that e-mail, I've engaged my brain a bit more tightly (learning
>how to "think like an electron"?) and realized that the switch I proposed -
>paralleling around the "failable" diode - "in case it failed" (open), added
>NOTHING - it simply duplicated the existing "E-bus switch" in Z-13 - it
>would pass power from main bus to e-bus.
> - If that diode opened, killing my e-bus radios, etc, I didn't need
>the proposed switch - I only needed to close the "E-bus switch" shown in
>Z-13 to power the E-bus from the other side (left side) of the Main Battery
>Contactor.
>
>I apologize for being a bit slow at this stuff. It's getting clearer as I
>"exercise" my rusty, dusty electron knowledge. Seems like I had "tunnel
>vision" on a particular part of the schematic, started "what if'ing", and
>lost sight of the "big picture".
Not a problem my friend. Please don't succumb to some notion
that an apology is in order. I hope that reasons most
people have for belonging to this list include giving
and receiving assistance in filtering chaff from good
stuff. We are surrounded by uncountable sources of unfounded,
illogical information.
We're all at various stages of practice in the art of
organizing our collective basket of simple-ideas into
the most efficient designs. May I suggest no useful purpose
is served to beat yourself up for loosing sight of
simple-ideas in the chaff-storm . . . it happens
to all of us. I am certain that my teachers have no
feelings of insult nor do they expect any regrets on my
part when I benefit from their guiding beams-of-light in
the storm.
For myself, it's a been a good day when I hit the sack
with some new simple-idea in mind that adds to my ability
to serve the folks who reward me for my labors.
Bob . . .
Message 3
| INDEX | Back to Main INDEX |
| PREVIOUS | Skip to PREVIOUS Message |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
| Subject: | Re: dimmer circuit |
--> AeroElectric-List message posted by: "LarryRobertHelming" <lhelming@sigecom.net>
Could you be more specific in exactly what kit that is you got from A&T
Labs? I have checked their web site and don't find anything that looks like
it is a dimmer control. Thanks.
Larry in Indiana, RV7 Tip-up O-360 3XG reserved.
Working on Canopy of Finish Kit
----- Original Message -----
From: "Gary Liming" <gary@liming.org>
Subject: Re: AeroElectric-List: dimmer circuit
> --> AeroElectric-List message posted by: Gary Liming <gary@liming.org>
>
>
> There is a neat dimmer kit you might want to look at with 3 channels
(three
> separate outputs all slaved to a master control) with several other
options
> described in the June 2003 Custom Planes. The kit is also available from
> A&T Labs at
> http://www.a-and-t-labs.com/
>
> I have the kit assembled and it looks pretty good - silk screened plated
> thru holes on the PC board, etc. The price varies as you only have to pay
> for what features you use.
>
> Gary Liming
>
> At 04:48 PM 5/27/2003 -0600, you wrote:
> >--> AeroElectric-List message posted by: "Jim Pack" <jpack@igs3.com>
> >
> >Perhaps I have put the cart before the horse, but I would like to make a
> >dimmer circuit for my annunciator panel (Which has already been cut into
my
> >panel).
>
>
Message 4
| INDEX | Back to Main INDEX |
| PREVIOUS | Skip to PREVIOUS Message |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
| Subject: | Re: XPDR antenna question |
--> AeroElectric-List message posted by: "Robert L. Nuckolls, III" <bob.nuckolls@cox.net>
At 06:36 PM 5/27/2003 +0200, you wrote:
>--> AeroElectric-List message posted by: "Gilles.Thesee"
><Gilles.Thesee@ac-grenoble.fr>
>
>Hi Bob and all,
>
>This is an installation question.
>I'm intending to install the transponder antenna in the fiber glass fairing
>below the tail.
>The ground plane is to be an aluminum cross, with the lateral arms bent to
>follow the fairing skin, and the antenna in the middle.
>Are there any drawbacks with this idea ?
>
>I posted some picture of the cardboard model at :
>
>
>http://gilles.thesee.free.fr/temp/DSCF1543.JPG
>http://gilles.thesee.free.fr/temp/DSCF1544.JPG
>http://gilles.thesee.free.fr/temp/DSCF1545.JPG
>http://gilles.thesee.free.fr/temp/DSCF1546.JPG
>
>Thanks,
>
>Gilles
When the ground plane cannot be "flat" it is
better that departures from flatness deflect
away from the antenna, not toward it. Also,
if you can keep the radials more disk-like,
your radiation pattern will be more uniform.
I would start with a round ground plane
and then bend some flanges in the disk
to conform to inside surfaces for attachment
to the airframe.
Bob . . .
Message 5
| INDEX | Back to Main INDEX |
| PREVIOUS | Skip to PREVIOUS Message |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
--> AeroElectric-List message posted by: "Bruce Gray" <Bruce@glasair.org>
Try this link.
http://www.a-and-t-labs.com/K11_Dimmer/index.htm
Bruce
www.glasair.org
-----Original Message-----
From: owner-aeroelectric-list-server@matronics.com
[mailto:owner-aeroelectric-list-server@matronics.com] On Behalf Of
LarryRobertHelming
Subject: Re: AeroElectric-List: dimmer circuit
--> AeroElectric-List message posted by: "LarryRobertHelming"
<lhelming@sigecom.net>
Could you be more specific in exactly what kit that is you got from A&T
Labs? I have checked their web site and don't find anything that looks
like
it is a dimmer control. Thanks.
Larry in Indiana, RV7 Tip-up O-360 3XG reserved.
Working on Canopy of Finish Kit
----- Original Message -----
From: "Gary Liming" <gary@liming.org>
Subject: Re: AeroElectric-List: dimmer circuit
> --> AeroElectric-List message posted by: Gary Liming <gary@liming.org>
>
>
> There is a neat dimmer kit you might want to look at with 3 channels
(three
> separate outputs all slaved to a master control) with several other
options
> described in the June 2003 Custom Planes. The kit is also available
from
> A&T Labs at
> http://www.a-and-t-labs.com/
>
> I have the kit assembled and it looks pretty good - silk screened
plated
> thru holes on the PC board, etc. The price varies as you only have to
pay
> for what features you use.
>
> Gary Liming
>
> At 04:48 PM 5/27/2003 -0600, you wrote:
> >--> AeroElectric-List message posted by: "Jim Pack" <jpack@igs3.com>
> >
> >Perhaps I have put the cart before the horse, but I would like to
make a
> >dimmer circuit for my annunciator panel (Which has already been cut
into
my
> >panel).
>
>
Message 6
| INDEX | Back to Main INDEX |
| PREVIOUS | Skip to PREVIOUS Message |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
| Subject: | Re: KA-25 hummmmmmmmmm . . . |
--> AeroElectric-List message posted by: "Robert L. Nuckolls, III" <bob.nuckolls@cox.net>
At 09:36 PM 5/27/2003 +0000, you wrote:
>Below is the result of your inquiry. It was submitted by
>Kelly Dossett (Kelly.Dossett@wnco.com) on Tuesday, May 27, 2003 at 14:36:55
>
>Tuesday, May 27, 2003
>
>Kelly Dossett
>
>,
>Email: Kelly.Dossett@wnco.com
>Comments/Questions: Dear Bob -
>I beleive I am lucky to have found your website! Help!
>
> From a quick review, I was looking for a simple trouble-shooting
> guide/advise you may have put together.
>
>As you guessed, I have a electrical problem on my airplane!
>
>I have a 1974 Grumman AA-5 "Traveler". Yesterday (27 May 2003) while
>flying in the local area, a massive/load electrical "Hummmmmmm" developed.
>This "hum" is noted over the speaker, as well as through my headsets/intercom.
>
>Upon landing and shutdown, I performed some minor troubleshooting. The
>"hum" is even noted, just as soon as I flip-on the Master-Switch!
>avionics Master-Switch is still in the OFF position) I mean to tell you,
>this "hum" is very loud. (the sound is like an electric motor is binding)
>
>Today, 24 hours later, I have determined, for what it is worth, that if I
>un-plug my KA-25 (King Isolation Amp.) the loud "hum" will cease.
>
>I know you must be "bombarded" with these types of questions. However, if
>you might be able to offer ANY ADVISE on how I might be able to better
>troubleshoot this problem, I would be so very grateful.
>
>In layman's terms, what function does the KA-25 serve?
>Could this KA-25 unit be my problem?
>
>Or, do you suspect my problem is elsewhere?
>
>My many, many thanks!
>
>Mr. Kelly Dossett
>N7167L @ KDTO - Denton Muni
>(Just north of Dallas, Texas)
The KA-25 is an audio isolation amplifier that combines
head-set only outputs from multiple receivers to
a single headset feed . . . it also mounts an audio
power amplifier to drive the cabin speaker.
The audio isolation amplifier may also have an intercom
function. It also may process warning tones from other
systems. This is why it's common practice to wire
the audio system to the main bus so that it will
function with the avionics master switch turned off.
I suspect something has failed in the KA 25 or it's
associated wiring to cause an oscillation (not unlike
the feedback you get on some PA systems with poorly
placed microphones) except this is a totally electronic
phenomenon. You will probably need the assistance
of an avionics technician who is more familiar with
this system.
I will invite you to join us on the AeroElectric List
to continue this and similar discussions. It's useful to
share the information with as many folks as possible.
You can join at . . .
http://www.matronics.com/subscribe/
Thanks!
Bob . . .
|---------------------------------------------------|
| A lie can travel half way around the world while |
| the truth is till putting on its shoes . . . |
| -Mark Twain- |
|---------------------------------------------------|
Message 7
| INDEX | Back to Main INDEX |
| PREVIOUS | Skip to PREVIOUS Message |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
| Subject: | Re: XPDR antenna question |
--> AeroElectric-List message posted by: "Gilles.Thesee" <Gilles.Thesee@ac-grenoble.fr>
> I would start with a round ground plane
> and then bend some flanges in the disk
> to conform to inside surfaces for attachment
> to the airframe.
>
> Bob . . .
Bob,
Thank you for your answer. I'll have another try with a round ground plane.
The reason for bending downward was because the top 4 inches of the fairing
are lined with carbon fiber. Thus the whole setup could be placed below this
conductive limit without bottoming the antenna.
Cheers,
Gilles
Message 8
| INDEX | Back to Main INDEX |
| PREVIOUS | Skip to PREVIOUS Message |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
| Subject: | Crimp tool metric an AWG |
--> AeroElectric-List message posted by: "Werner Schneider" <wernerschneider@compuserve.com>
Bob and all,
I was able to organize here in Switzerland a crimp tool for thicker wire.
Problem is, the dies supplied with the pliers is metric, I was able to find
a conversion table (thanks to google )
AWG 2 dia 6.54 mm area 33.60 mm2
AWG 6 dia 4.11 mm area 13.30 mm2
The dies I have say 6/10/16/25/35 I believe this is mm2
exactly it says something like 12 KP Cu 25 where the KP seems to be the
brand small K lower rear leg extend downwards in something like a half
circle.
I would prefer to crimp, can I use the 10 die for AWG 6 and the 35 for AWG
2?
Is this safe?
Any help very much appreciated!
Many thanks
Werner
Message 9
| INDEX | Back to Main INDEX |
| PREVIOUS | Skip to PREVIOUS Message |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
| Subject: | Re: XPDR antenna question |
--> AeroElectric-List message posted by: "Robert L. Nuckolls, III" <bob.nuckolls@cox.net>
At 09:11 PM 5/28/2003 +0200, you wrote:
>--> AeroElectric-List message posted by: "Gilles.Thesee"
><Gilles.Thesee@ac-grenoble.fr>
>
> > I would start with a round ground plane
> > and then bend some flanges in the disk
> > to conform to inside surfaces for attachment
> > to the airframe.
> >
> > Bob . . .
>
>Bob,
>
>Thank you for your answer. I'll have another try with a round ground plane.
>The reason for bending downward was because the top 4 inches of the fairing
>are lined with carbon fiber. Thus the whole setup could be placed below this
>conductive limit without bottoming the antenna.
Fine, the bent tabs of the ground plane can couple to the
carbon fiber . . . this is good. Primary goal is to
give the antenna best possible 360 degree line of sight
to the horizon.
Bob . . .
Message 10
| INDEX | Back to Main INDEX |
| PREVIOUS | Skip to PREVIOUS Message |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
| Subject: | Re: XPDR antenna question |
--> AeroElectric-List message posted by: "Gilles.Thesee" <Gilles.Thesee@ac-grenoble.fr>
>
> Fine, the bent tabs of the ground plane can couple to the
> carbon fiber . . . this is good. Primary goal is to
> give the antenna best possible 360 degree line of sight
> to the horizon.
>
> Bob . . .
Bob,
It's nice to get instant advice.
Does it look better now ?
http://gilles.thesee.free.fr/temp/DSCF1550.JPG
http://gilles.thesee.free.fr/temp/DSCF1554.JPG
http://gilles.thesee.free.fr/temp/DSCF1555.JPG
Thanks a lot,
Gilles
Message 11
| INDEX | Back to Main INDEX |
| PREVIOUS | Skip to PREVIOUS Message |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
| Subject: | Re: XPDR antenna question |
--> AeroElectric-List message posted by: "Robert L. Nuckolls, III" <bob.nuckolls@cox.net>
At 11:46 PM 5/28/2003 +0200, you wrote:
>--> AeroElectric-List message posted by: "Gilles.Thesee"
><Gilles.Thesee@ac-grenoble.fr>
>
>
> >
> > Fine, the bent tabs of the ground plane can couple to the
> > carbon fiber . . . this is good. Primary goal is to
> > give the antenna best possible 360 degree line of sight
> > to the horizon.
> >
> > Bob . . .
>
>Bob,
>It's nice to get instant advice.
>
>Does it look better now ?
>http://gilles.thesee.free.fr/temp/DSCF1550.JPG
>http://gilles.thesee.free.fr/temp/DSCF1554.JPG
>http://gilles.thesee.free.fr/temp/DSCF1555.JPG
That's it!
>Thanks a lot,
You're most welcome . . .
Bob . . .
Message 12
| INDEX | Back to Main INDEX |
| PREVIOUS | Skip to PREVIOUS Message |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
| Subject: | Re: Crimp tool metric an AWG |
--> AeroElectric-List message posted by: "Robert L. Nuckolls, III" <bob.nuckolls@cox.net>
At 10:30 PM 5/28/2003 +0200, you wrote:
>--> AeroElectric-List message posted by: "Werner Schneider"
><wernerschneider@compuserve.com>
>
>Bob and all,
>
>I was able to organize here in Switzerland a crimp tool for thicker wire.
>Problem is, the dies supplied with the pliers is metric, I was able to find
>a conversion table (thanks to google )
>
>AWG 2 dia 6.54 mm area 33.60 mm2
>AWG 6 dia 4.11 mm area 13.30 mm2
>
>The dies I have say 6/10/16/25/35 I believe this is mm2
>
>exactly it says something like 12 KP Cu 25 where the KP seems to be the
>brand small K lower rear leg extend downwards in something like a half
>circle.
>
>I would prefer to crimp, can I use the 10 die for AWG 6 and the 35 for AWG
>2?
>
>Is this safe?
>
>Any help very much appreciated!
What you have hypothesized about the die sizes
seems reasonable. Give it a try. Saw the test terminal
in two centered on the wire grip. Sand the sawed
end with increasingly finer sand paper until you can
distinctly see individual strands (areas of bright
copper surrounded by very thin lines of tin plating).
The crimp should be totally free of visible voids . . .
i.e. the terminal and wire have become one piece of
metal.
Bob . . .
Message 13
| INDEX | Back to Main INDEX |
| PREVIOUS | Skip to PREVIOUS Message |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
| Subject: | Re: dimmer circuit |
--> AeroElectric-List message posted by: Mark Phillips <ripsteel@edge.net>
Hi Jim-
My annunciator panel is not fed with a dimmer, but my panel lights are.
(If you have ACAD type stuff, I can send you a copy, if interested)
I put one of these little PWM controllers together to use as a panel
dimmer and it actually works! It worked great as a motor speed
controller (you get a little motor with the kit) and it's rated for 10A,
but I removed the motor F/R switch and bought a better quality pot to
remote mount on the panel. The one with the kit is OK, just a little
twitchy as you change the output. I've had a project board full of LEDs
running off it for about a month total, so I suppose it should hold up OK.
see: http://mpja.com/productview.asp?product=4057+MD
Sixteen bux. I ordered this thing and it arrived as a bunch of parts in
a ziplock, so I got to do a little soldering, which was a great
confidence builder. They've got a lot of other neat stuff- bought a
bunch of LEDs etc, low prices & no, I'm not affiliated!
From The PossumWorks
Mark
Jim Pack wrote:
> --> AeroElectric-List message posted by: "Jim Pack" <jpack@igs3.com>
>
> Perhaps I have put the cart before the horse, but I would like to make a
> dimmer circuit for my annunciator panel (Which has already been cut into my
> panel).
>
>
> Is anyone able/willing to suggest a scematic for the dimmer circuit? I have
> 6 LEDs & a single mini switch that can control it.
>
>
> This is the explanation of how each are proposed to be connected.
>
>
> Label
> Intent
> How connected
>
> Main Alt Fail
> Warn of Alt Fail
> hooked up to the LR3 indicator circuit
>
> Aux Alt Fail
> Warn of Alt Fail
> hooked up to the LR3 indicator circuit
>
> X-Feed On
> Warn of engaged X-feed
> Hooked up per Z-14 diagram between posts 5 and 2 on the crossfeed
> switch.
>
> Starter On
> Warn of stuck starter
> connected to the I terminal on the Starter Contactor (S702-1) and
> Ground.
>
> Oil Pressure Low
> Warn of low oil pressure
> connected to the I terminal on the Oil pressure switch (S710-1) and the
> Aux Bus Fuse Box.
>
> A/P On
> Warn that A/P is engaged (light out, not engaged)
> Connected to the Autopilot Control unit power and Ground.
>
>
> Thanks,
>
> Jim
>
>
>
>
>
>
>
>
Message 14
| INDEX | Back to Main INDEX |
| PREVIOUS | Skip to PREVIOUS Message |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
| Subject: | Re: Microair Radio-Xpdr Wire Harness |
--> AeroElectric-List message posted by: "Robert L. Nuckolls, III" <bob.nuckolls@cox.net>
At 10:40 PM 5/23/2003 -0600, you wrote:
>--> AeroElectric-List message posted by: "Rick Fogerson" <rickf@cableone.net>
>
>
>----- Original Message -----
>From: "Rick Fogerson" <rickf@cableone.net>
>To: <aeroelectric-list@matronics.com>
>Subject: Re: AeroElectric-List: Fw: Electric Bob - Microair Radio-Xpdr Wire
>Harness
I can ship tomorrow morning. I have the following
data from your last order:
Rick Fogerson
7558 W. Hathaway Ct
Boise, ID 83703
Country: USA
Phone: 208-853-0436
Email: rickf@velocitus.net
The visa you used ended in -0629 . . . do
you want to use this same card?
VISA/Mastercard: xxxx-xxxx-xxxx-0629
Expiry: 07/04
Bob . . .
Other Matronics Email List Services
These Email List Services are sponsored solely by Matronics and through the generous Contributions of its members.
-- Please support this service by making your Contribution today! --
|