Today's Message Index:
----------------------
1. 05:45 AM - Re: Fw: [lycoming] New Electronic Ignition (Gary Casey)
2. 05:45 AM - Re: Strobe noise (Brian Lloyd)
3. 06:11 AM - LED / Strobe Position Lights (sonex293@nc.rr.com)
4. 07:11 AM - Re: Strobe noise (Brian Lloyd)
5. 07:53 AM - Re: LED / Strobe Position Lights (echristley@nc.rr.com)
6. 08:00 AM - Where do I start? (Robert L. Nuckolls, III)
7. 08:06 AM - Re: Re: Fw: [lycoming] New Electronic Ignition (Jaye and Scott Jackson)
8. 08:29 AM - Re: Strobe noise (Robert L. Nuckolls, III)
9. 08:35 AM - Radio problem SOLVED! (Chad Stenson)
10. 08:38 AM - Re: Starting Power (Robert L. Nuckolls, III)
11. 09:29 AM - New Electronic Ignition System - Being part of the solution (Robert L. Nuckolls, III)
12. 09:30 AM - Re: Strobe supply question (Robert L. Nuckolls, III)
13. 10:21 AM - Multiple power feed wiring problem . . . (Robert L. Nuckolls, III)
14. 11:18 AM - Re: Multiple power feed wiring problem . . . (echristley@nc.rr.com)
15. 11:30 AM - Re: Strobe noise (Peter Laurence)
16. 11:49 AM - ACS switch issues for Rotax 912S (Joa Harrison)
17. 11:49 AM - Re: Multiple power feed wiring problem . . . (Rob Housman)
18. 12:29 PM - Re: LED / Strobe Position Lights (Paul McAllister)
19. 01:56 PM - Strobe noise (Mark Sherman)
20. 03:13 PM - Re: Multiple power feed wiring problem . . . (Robert L. Nuckolls, III)
21. 03:17 PM - Re: ACS switch issues for Rotax 912S (Robert L. Nuckolls, III)
22. 03:47 PM - Re: New Electronic Ignition System - Being part of the solution (Remi Khu)
23. 03:52 PM - Re: New Electronic Ignition System - Being part of the sol... (BobsV35B@aol.com)
24. 04:30 PM - Re: New Electronic Ignition System - Being part of the sol... (Remi Khu)
25. 04:38 PM - Re: Starting Power (David Schaefer)
26. 04:55 PM - Re: New Electronic Ignition System - Being part of the sol... (BobsV35B@aol.com)
27. 05:24 PM - Re: Strobe noise (Charlie England)
28. 05:43 PM - Re: AeroElectric-List Digest: 17 Msgs - 08/15/04 (Dale Alexander)
29. 06:45 PM - Re: Strobe noise (plaurence@the-beach.net)
30. 06:50 PM - Re: Where do I start? (jrstone)
31. 06:55 PM - Re: Multiple power feed wiring problem . . . (Ernest Christley)
32. 07:52 PM - No side-tone (Jeff Orear)
33. 09:07 PM - single antenna for Narco 140 (Jaye and Scott Jackson)
Message 1
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| Subject: | Re: Fw: [lycoming] New Electronic Ignition |
--> AeroElectric-List message posted by: "Gary Casey" <glcasey@adelphia.net>
<<Speaking as an electrical engineer who made a living designing
electronic ignition systems for vehicles, the absolute worst thing
you can do in ignition design is put the coils next to the other
electronics of the system. Coils generate voltages in excess of
30,000 volts, microprocessors run on 5 volt busses, these two types
of devices cannot live in close proximity without serious compromise
of the system. You can look at the design of any current automotive
system....Robert Paisley>>
I disagree. While your sentiment has been widely assumed, the success of
the design depends more on the detail design of the system than the
proximity of the coil and the electronics. I have been building electronic
engine management systems for race cars for 20 years with this same concept,
many using that very same (Ford design) coil package. Some of those used GM
ignition coils mounted directly above the microprocessor, with the connector
pins as little as 0.1 inches from the micro. Most of the noise created by
an ignition coil is conducted (not radiated) caused by the voltage spike
reflected into the power supply and this has to be accounted for in any
system, closely coupled or not. Many of the GM ignition systems mount the
coils directly on the electronics, although I don't know if there is a
microprocessor in that package.
An equal worry is potential failure caused by vibration or temperature, but
that can also be accounted for in the design. I like the concept of this
new product. Unfortunately, a 6-cylinder package is a completely different
design challenge.
Gary Casey
Message 2
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| Subject: | Re: Strobe noise |
--> AeroElectric-List message posted by: Brian Lloyd <brianl@lloyd.com>
On Aug 15, 2004, at 11:43 AM, Mark Sherman wrote:
> Never the less, Radio Shack has discontinued the
> 270-030 filter choke. They only offer new electronic
> versions, don't know if these will work the same or
> not. I would like to confirm that the electronic type
> will work or have part numbers for the choke and
> capacitor from another vendor.
Since the value of the choke is not all that critical, if you need a
choke you can use one winding of a transformer. Use a transformer with
a secondary voltage something like 6.3VAC, 12VAC, or 24VAC. The higher
the voltage rating of the secondary, the greater the inductance. Make
sure that the current rating of the secondary is sufficient to carry
the load. Do not short the secondary winding or the inductance of your
ersatz choke will decrease.
Brian Lloyd 6501 Red Hook Plaza
brianl@lloyd.com Suite 201
+1.340.998.9447 St. Thomas, VI 00802
Message 3
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| Subject: | LED / Strobe Position Lights |
--> AeroElectric-List message posted by: sonex293@nc.rr.com
While browsing through Barnstormers.com I came across some LED / Strobe wingtip
lights that look interesting. The site listed is
http://www.gs-air.com/
Has anyone had a chance to look at these wingtip lights? If they perform adequately,
it looks like they could fill a market missed by the current LED position
light offerings.
Michael Crowder
Sonex #293
Message 4
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| Subject: | Re: Strobe noise |
--> AeroElectric-List message posted by: Brian Lloyd <brianl@lloyd.com>
On Aug 16, 2004, at 8:43 AM, Brian Lloyd wrote:
Oops.
>> Make
>> sure that the current rating of the secondary is sufficient to carry
>> the load. Do not short the secondary winding or the inductance of
>> your
>> ersatz choke will decrease.
>
> That should have read, "Do not short the *primary* winding..."
Brian Lloyd 6501 Red Hook Plaza
brianl@lloyd.com Suite 201
+1.340.998.9447 St. Thomas, VI 00802
Message 5
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| Subject: | Re: LED / Strobe Position Lights |
--> AeroElectric-List message posted by: echristley@nc.rr.com
----- Original Message -----
From: sonex293@nc.rr.com
Subject: AeroElectric-List: LED / Strobe Position Lights
> --> AeroElectric-List message posted by:
sonex293@nc.rr.com
>
> While browsing through Barnstormers.com I came
across some LED /
> Strobe wingtip lights that look interesting. The
site listed is
>
> http://www.gs-air.com/
>
> Has anyone had a chance to look at these wingtip
lights? If they
> perform adequately, it looks like they could fill
a market missed
> by the current LED position light offerings.
>
> Michael Crowder
> Sonex #293
You can't tell much from the picture, but unless
they have an LED product which is much brighter than
what I've seen made available in a T05 package (a
VERY likely possibility), then I think this product
would likely be very disappointing.
I've been reworking my taillight design and webpage
after discussions in a previous thread here. I
think I've done a fairly good job of explaining what
is necessary to get what is needed from the standard
T05 packaged LEDs, and the best I could do was 37
lamps for the tailight alone. I still have a few
pictures to create, but it should be online 'real
soon now' (TM).
BTW, I just picked up my engine last week, so a lot
of other work I was doing slowed to a crawl 8*)
Message 6
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| Subject: | Where do I start? |
--> AeroElectric-List message posted by: "Robert L. Nuckolls, III" <bob.nuckolls@cox.net>
> Bob,
> Reading your book and other scamatics I suppose should be easy, but
> without an appendix, and index in picture form what all these symbles
> represent, I am spending (wasting) a lot of time. Help me out here will
> you, please? Where can I go for help here? A special book? Tell me, I'll
> buy it!
Other than Tony B's books, I'm unaware of any 'cook-book' approaches
to system architecture and fabrication. The 'Connection is the recommended
starting point. The drawing "seminar.dwg" found on the CD cited below
has a lot of your wiring diagram already drawn . . . ready for you to
keep, modify, discard or add to as you see fit.
> Can you recommend a cheap software for me to use to create my own
> electrical system documentation? One which might have all these symbles I
> could just drop in? I don't want to spend a fortune on some 3D Cad
> system, please.
The CD we offer contains an image of my website before the parts
business was transferred to B&C several years ago. Most of the parts
in the drawings are illustrated in figures and descriptions of the parts
catalog.
The CD also has three CAD programs that will open, edit and print
drawings included on the CD. There's a wirebook in progress that
probably has 90% of the work for your wirebook already done. Feel
free to use these materials in any way useful to you. My personal
preference of the three CAD programs
is AutoCAD LT 1.0 for windows. You need 4 clean floppies. Execute
"makeset.bat"
from the CD and the program will generate 4 pristine install disks for
the software. The price is hard to beat . . . if you have a high
speed Internet connection, you can download the CD at no charge from:
http://www.aeroelectric.com/CD/AEC8_0.zip
I think you're suffering a malady common to first time builders.
It's a sort of can't see the "trees for the forest" syndrome.
Looking at the whole task makes it difficult to sort out the
dozens of simple-ideas that get stacked up like Tinker-Toys
and Legos to configure the system of your dreams. The starting
point must be to acquire an understanding of the Tinker-Toys.
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.
A further benefit can be realized with membership on
the list. There are lots of technically capable folks
on the list who can offer suggestions too. You can
join at . . .
http://www.matronics.com/subscribe/
In the final analysis, if you don't find any of our offerings
to be of value to you, just let me know. I'll refund your money
and you can keep the book.
Regards,
Bob . . .
--------------------------------------------
( Knowing about a thing is different than )
( understanding it. One can know a lot )
( and still understand nothing. )
( C.F. Kettering )
--------------------------------------------
Message 7
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| Subject: | Re: Fw: [lycoming] New Electronic Ignition |
--> AeroElectric-List message posted by: "Jaye and Scott Jackson" <jayeandscott@telus.net>
The Electroair electronic ignition has the coils mounted right on top of the
little bits......
Scott in VAncouver
----- Original Message -----
From: "Gary Casey" <glcasey@adelphia.net>
Subject: AeroElectric-List: Re: Fw: [lycoming] New Electronic Ignition
> --> AeroElectric-List message posted by: "Gary Casey"
<glcasey@adelphia.net>
>
> <<Speaking as an electrical engineer who made a living designing
> electronic ignition systems for vehicles, the absolute worst thing
> you can do in ignition design is put the coils next to the other
> electronics of the system. Coils generate voltages in excess of
> 30,000 volts, microprocessors run on 5 volt busses, these two types
> of devices cannot live in close proximity without serious compromise
> of the system. You can look at the design of any current automotive
> system....Robert Paisley>>
>
> I disagree. While your sentiment has been widely assumed, the success of
> the design depends more on the detail design of the system than the
> proximity of the coil and the electronics. I have been building
electronic
> engine management systems for race cars for 20 years with this same
concept,
> many using that very same (Ford design) coil package. Some of those used
GM
> ignition coils mounted directly above the microprocessor, with the
connector
> pins as little as 0.1 inches from the micro. Most of the noise created by
> an ignition coil is conducted (not radiated) caused by the voltage spike
> reflected into the power supply and this has to be accounted for in any
> system, closely coupled or not. Many of the GM ignition systems mount the
> coils directly on the electronics, although I don't know if there is a
> microprocessor in that package.
>
> An equal worry is potential failure caused by vibration or temperature,
but
> that can also be accounted for in the design. I like the concept of this
> new product. Unfortunately, a 6-cylinder package is a completely
different
> design challenge.
>
> Gary Casey
>
>
Message 8
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| Subject: | Re: Strobe noise |
--> AeroElectric-List message posted by: "Robert L. Nuckolls, III" <rnuckolls@aeroelectric.com>
At 08:43 AM 8/16/2004 -0400, you wrote:
>--> AeroElectric-List message posted by: Brian Lloyd <brianl@lloyd.com>
>
>On Aug 15, 2004, at 11:43 AM, Mark Sherman wrote:
>
> > Never the less, Radio Shack has discontinued the
> > 270-030 filter choke. They only offer new electronic
> > versions, don't know if these will work the same or
> > not. I would like to confirm that the electronic type
> > will work or have part numbers for the choke and
> > capacitor from another vendor.
>
>Since the value of the choke is not all that critical, if you need a
>choke you can use one winding of a transformer. Use a transformer with
>a secondary voltage something like 6.3VAC, 12VAC, or 24VAC. The higher
>the voltage rating of the secondary, the greater the inductance. Make
>sure that the current rating of the secondary is sufficient to carry
>the load. Do not short the primary winding or the inductance of your
>ersatz choke will decrease.
I considered this alternative. Problem is that filter
chokes like the one offered in the 270-030 kit have
air-gaps in the core to prevent core saturation. AC
transformers don't have or need the air-core . . . they'll
saturate as some level of DC current flow that could
degrade the filtering effects if not render it useless.
I'll try to do some bench testing on specific parts
from Radio Shack to quantify their usefulness.
Bob . . .
---
Message 9
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| Subject: | Radio problem SOLVED! |
--> AeroElectric-List message posted by: Chad Stenson <cjstenson@ameritech.net>
Thank you to everyone who posted possible fixes for my radio problem. To solve
the problem, I ended up making a floating ground plane and attaching the antenna
to that. The ground plane/antenna are isolated entirely from any metal part
of the airframe. Worked like a charm yesterday. I'm picking up clear transmissions
from air traffic 70+ miles away now at only 1000'AGL. This was all
done with my backup handheld radio since my Vertex Standard radio had to be sent
in to the shop. Their tech said that the squelch needed to be realigned.
Don't know what that means.
I do have another question though. When I turn my GPS on with the remote antenna
mounted to the windshield, it creates a terrible interference with the com
radio. If I disconnect the remote antenna, it's fine. Any thoughts? This problem
is only occuring with my Icom radio, I never had a problem with the Vertex,
so it may be a moot point. Still curious what could be causing this though.
Thanks again.
chad
Sent through e-mol. E-mail, Anywhere, Anytime. http://www.e-mol.com
Message 10
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| Subject: | Re: Starting Power |
--> AeroElectric-List message posted by: "Robert L. Nuckolls, III" <rnuckolls@aeroelectric.com>
At 06:02 PM 8/15/2004 -0500, you wrote:
>--> AeroElectric-List message posted by: "David Schaefer"
><dschaefer1@kc.rr.com>
>
>I'm still confused why my 'alternate' buss is being drained during starting,
>when it should be completely isolated! The only time the two busses are
>tied together is in the event of a failure or either alternator. That said,
>the alternate buss should be completely separate and the electronics tied to
>that buss unaffected by starting.
>
>
>Thoughts?
>
>
>David
I presume you're talking about a figure Z-14 system.
If you have electronics that are not designed to live in the
real world of aircraft electrical systems that require
isolated battery support during engine cranking . . . then
you'll have to design a system with a main battery sized for
cranking. The aux battery can be same size or much smaller
because you DON't close the crossfeed contactor for cranking.
Bob . . .
---
Message 11
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| Subject: | New Electronic Ignition System - Being part of the |
solution
--> AeroElectric-List message posted by: "Robert L. Nuckolls, III" <rnuckolls@aeroelectric.com>
(See leading comments appended below)
Gary Casey addressed physics of issue most elegantly . . . the key
to a successful design is to understand and deal with all the
problems from a standpoint of understanding. It's all simple-ideas.
We've been putting sensitive electronics in the same box with
ugly electronics for years. Yes, there ARE potential interference
problems that must be addressed . . . so we put the engineer hats
on and get it done.
Any solution's complexity or cost might drive the product
out of the market . . . that's the other side of the coin
for bringing a product to market. The most successful manufacturer's
have achieved a balanced approach between what features are
provided and what consumers will pay for those features.
Let us consider the mechanism of advancing state-of-our-art . . .
The folks at emagair.com have elected to offer a system featuring
a one-piece, drop-in electronic replacement for a mag. To paint
their product with the broad-brush of "the worst thing you can
do" philosophy is unfair and ignores the demonstrable achievements
of creative engineers everywhere. The question is, "have they
solved all the problems?" Certainly they must think so or the
product wouldn't be available for sale. Should we be skeptical?
You betcha! Do just like we did when Klaus brought his first
offerings to the market in 1985 . . . make the new kid on the
block run along side ol' grandpa magneto (or ANY other different
system) and PROVE himself worthy.
I'll suggest the real "worst thing we can do" is wade into discussions
swinging hammers-n-chains because our personal knowledge
and experience suggests that the product is not worthy of
attention. If guys like Gates and Jobs had not hunkered down
in their garages sorting though personal collections of simple-ideas,
the world's best offering for personal computing might still
fill up a room, be programmed on punch-cards and cost as much
as your house.
Emag is one of the most exciting new ideas to come along in OBAM
aircraft ignition systems in 10 years. If I owned an OBAM
aircraft, I'd put ONE of these critters on order right now.
I've e-mailed a few folks directly asking them to consider
this product for their currently-flying aircraft. Inquiring
minds want to know . . .
Let's put him under the magnifying glass but without
discouraging or disparaging his efforts and vision. Whether
his product is win, loose or draw . . . we can all participate
in the considered evaluation facts to the benefit
of everyone INCLUDING the manufacturer. If there are problems
with his product, let's help him identify them and provide
a platform for proving the solutions.
This, ladies and gentlemen, is something that CANNOT happen
in certified aircraft. Powers-that-be make it extremely difficult
to advance the state of the art in certified ships. Let's
give this guy all the support we can to assist and assure his success.
Bob . . .
At 04:37 PM 8/15/2004 -0700, you wrote:
>--> AeroElectric-List message posted by: "DonVS" <dsvs@comcast.net>
>
>Bob,
>This was what had me worried. I do not know enough to argue with this
>engineer. Do you feel that his concerns are valid? Thanks for the input.
>Don
>
>-----Original Message-----
>From: Robert Paisley [mailto:robert@protekperformance.com]
>To: SoCAL-RVlist@yahoogroups.com
>Subject: [SoCAL-RVlist] Re: Fw: [lycoming] New Electronic Ignition
>System and Supplier
>
>
>Some more commentary,
>Speaking as an electrical engineer who made a living designing
>electronic ignition systems for vehicles, the absolute worst thing
>you can do in ignition design is put the coils next to the other
>electronics of the system. Coils generate voltages in excess of
>30,000 volts, microprocessors run on 5 volt busses, these two types
>of devices cannot live in close proximity without serious compromise
>of the system. You can look at the deisgn of any current automotive
>system. The control electronics are in the passenger cabin, the
>coils are in the engine area, with as much metal and space in
>between as possible. This Emag system is fundamentally a REALLY bad
>idea. Others have tried to bundle components like this before. All
>previous products with this type of system architecture have failed
>miserably. Personally, I wouldn't consider this type of ignition for
>a land vehicle, let alone an airplane.
---
Message 12
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| Subject: | Re: Strobe supply question |
--> AeroElectric-List message posted by: "Robert L. Nuckolls, III" <rnuckolls@aeroelectric.com>
At 12:25 AM 8/15/2004 -0400, you wrote:
>--> AeroElectric-List message posted by: Charlie Kuss <chaztuna@adelphia.net>
>
>Bob
> Thanks for the info. I'd like to mount the power supply under my cockpit
>floor for ease of access. It will be about 4 feet from the intercom head
>and about 2 feet from the co-pilot's harness (at the nearest point).
>Charlie
Bolt 'er down. Probability of difficulty is very remote.
Bob . . .
---
Message 13
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| Subject: | Multiple power feed wiring problem . . . |
--> AeroElectric-List message posted by: "Robert L. Nuckolls, III" <bob.nuckolls@cox.net>
>Comments/Questions: Hi Bob, I just read all your notes about
>wiring aircraft. I'm building an RV6 in Australia. I have a
>question. As per Vans diagram I'm trying to put all my engine gauges onto
>1 CB but it totals 7 wires and their 7 ring terminals wont all fit onto
>the CB screw.
>
>Shall I get a longer screw or will a connector do better? If so what size
>wire will i need to go from the CB to the connector?
>
>thank you
I've expanded an article I did on the website so that
it speaks specifically to your question. If it were
my airplane, I'd use a PIDG splice to fan out the
single power feed wire to seven instruments as shown
here:
http://www.aeroelectric.com/articles/multiplewires/multiplewires.html
Bob . . .
Message 14
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| Subject: | Re: Multiple power feed wiring problem . . . |
--> AeroElectric-List message posted by: echristley@nc.rr.com
----- Original Message -----
From: "Robert L. Nuckolls, III" <bob.nuckolls@cox.net>
Subject: AeroElectric-List: Multiple power feed
wiring problem . . .
> I've expanded an article I did on the website
so that
> it speaks specifically to your question. If it were
> my airplane, I'd use a PIDG splice to fan out the
> single power feed wire to seven instruments as
shown
> here:
>
>
http://www.aeroelectric.com/articles/multiplewires/multiplewires.html
>
> Bob . . .
>
Bob, you may already be aware of it, but this
month's Sport Aviation has an article on aircraft
wiring. The method you demonstrate so eloquently in
the article is specifically called out as likely to
cause problems.
Message 15
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| Subject: | Re: Strobe noise |
--> AeroElectric-List message posted by: Peter Laurence <dr.laurence@mbdi.org>
The Shack has a filter (770-0055) which has a .7 uH inductor with two
caps.as opposed to the (270-030A). which has a 1.9uH inductor.
If I can't find one left on the shelf, I'm going to try the 770-0055 on a
noisy electric HSI..
Let you know how it turns out.
Peter
RV9A
waiting for wings
> >On> >
> > > Never the less, Radio Shack has discontinued the
> > > 270-030 filter choke. They only offer new electronic
> > > versions, don't know if these will work the same or
> > > not. I would like to confirm that the electronic type
> > > will work or have part numbers for the choke and
> > > capacitor from another vendor.
> >
> >Since the value of the choke is not all that critical, if you need a
> >choke you can use one winding of a transformer. Use a transformer with
> >a secondary voltage something like 6.3VAC, 12VAC, or 24VAC. The higher
> >the voltage rating of the secondary, the greater the inductance. Make
> >sure that the current rating of the secondary is sufficient to carry
> >the load. Do not short the primary winding or the inductance of your
> >ersatz choke will decrease.
>
> I considered this alternative. Problem is that filter
> chokes like the one offered in the 270-030 kit have
> air-gaps in the core to prevent core saturation. AC
> transformers don't have or need the air-core . . . they'll
> saturate as some level of DC current flow that could
> degrade the filtering effects if not render it useless.
>
> I'll try to do some bench testing on specific parts
> from Radio Shack to quantify their usefulness.
>
> Bob . . .
>
>
> ---
>
>
Message 16
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| Subject: | ACS switch issues for Rotax 912S |
--> AeroElectric-List message posted by: Joa Harrison <flyasuperseven@yahoo.com>
Ok, I traced it down to the ACS ignition switch (P/N A-510-2). When I switch to
the left side ("R") it will cut out sometimes. Not very often but if I do it
just right then off she goes. The switch only had been used about 40 hours
when this started showing up.
It appears that it is grounding, or at least partially grounding, inadvertently
when switched over to that "mag".
Could it have to do with the diode issue that ACS mentions with regards to impulse
coupled mags?
FWIW I've wired according to Bob's notes with the shield acting as the ground.
I was very very careful when wiring and so far this is the only electrical problem
I've had.
I've also wiggled all the wires around behind the switch (and also the engine)
and it doesn't seem to be any of the wires. I'm guessing it's internal to the
switch or something to do with a spike of some sort.
Any other ideas before I pull the switch out and send it back to ACS? Anybody
else had issues with this switch?
Joa
+++++++++++++++++++++++++++++++++++++++++++++++++++++++++
For the first time I noticed an intermittent ignition issue with my Rotax 912S.
The right ignition controller cut out several times when doing a "mag" check
(on the ground of course). I couldn't get it to duplicate again since though.
I carefully checked my wiring and also used an ohmmeter to check continuity to
see if there was a short causing that side to cut out. No joy.
Perhaps a problem with the starter switch (ACS unit)?
Anybody else with experience with this ignition and possibly some suggestions?
Thanks folks!
Joa
"who just *hates* intermittent electrical issues"
Message 17
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| Subject: | Multiple power feed wiring problem . . . |
--> AeroElectric-List message posted by: "Rob Housman" <RobH@hyperion-ef.com>
...and that's not the only erroneous information in that article in the
current issue of Sport Aviation.
Best regards,
Rob Housman
Europa XS Tri-Gear A070
Airframe complete
Irvine, CA
-----Original Message-----
From: owner-aeroelectric-list-server@matronics.com
[mailto:owner-aeroelectric-list-server@matronics.com]On Behalf Of
echristley@nc.rr.com
Subject: Re: AeroElectric-List: Multiple power feed wiring problem . . .
--> AeroElectric-List message posted by: echristley@nc.rr.com
----- Original Message -----
From: "Robert L. Nuckolls, III" <bob.nuckolls@cox.net>
Subject: AeroElectric-List: Multiple power feed
wiring problem . . .
> I've expanded an article I did on the website
so that
> it speaks specifically to your question. If it were
> my airplane, I'd use a PIDG splice to fan out the
> single power feed wire to seven instruments as
shown
> here:
>
>
http://www.aeroelectric.com/articles/multiplewires/multiplewires.html
>
> Bob . . .
>
Bob, you may already be aware of it, but this
month's Sport Aviation has an article on aircraft
wiring. The method you demonstrate so eloquently in
the article is specifically called out as likely to
cause problems.
Message 18
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| Subject: | Re: LED / Strobe Position Lights |
--> AeroElectric-List message posted by: "Paul McAllister" <paul.mcallister@qia.net>
Hi,
I purchased my wingtip LED lights and tail light from Eric Jones at
www.PerihelionDesign.com . They work very well and consume approximately 1/3
of the current of the incandescent type. I believe that these lights have
had a photometric survey performed on them to ensure that they meet the FAA
requirements.
Paul
Message 19
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--> AeroElectric-List message posted by: Mark Sherman <msherman95632@yahoo.com>
Bob.
As we discussed before, Radio Shack has discontinued
the 270-030 choke filter. I thought I would try the
270-051 noise filter they offer now.
I couldn't help my self, I had to tear it open and see
what makes it tick. It's the same as the old 270-030
except they hook it all up for you and put it in a
nice plastic tube with all the parts inside insulated
with foam.
I installed it between the fuse buss and the ValCom
760 radio and all the strobe noise went away.
This noise filter is rated for 10 amps with a 0.4 vdc
drop at 10 amps.
They get $16.00 for it, I have seen what looks like
the same thing on line at Parts Express (I think) for
$6.00.
The issue with my Grand Rapids EIS of erroneous AMP
readings has yet to be fixed. GRT sent me to Radio
Shack to get a Ferrite Line Filter (part #273-105). A
little clamp on filter that goes around the wires
leading into the EIS unit. This helped but didn't
eliminate the problem. Waiting for a call back!
As always thanks for your help and support.
=====
Mark S.
CH-701/912ULS
N752MS reserved
__________________________________
Message 20
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| Subject: | Re: Multiple power feed wiring problem . . . |
--> AeroElectric-List message posted by: "Robert L. Nuckolls, III" <rnuckolls@aeroelectric.com>
At 02:17 PM 8/16/2004 -0400, you wrote:
>--> AeroElectric-List message posted by: echristley@nc.rr.com
>
>
>----- Original Message -----
>From: "Robert L. Nuckolls, III" <bob.nuckolls@cox.net>
>Date: Monday, August 16, 2004 1:21 pm
>Subject: AeroElectric-List: Multiple power feed
>wiring problem . . .
>
> > I've expanded an article I did on the website
>so that
> > it speaks specifically to your question. If it were
> > my airplane, I'd use a PIDG splice to fan out the
> > single power feed wire to seven instruments as
>shown
> > here:
> >
> >
>http://www.aeroelectric.com/articles/multiplewires/multiplewires.html
> >
> > Bob . . .
> >
>
>
>Bob, you may already be aware of it, but this
>month's Sport Aviation has an article on aircraft
>wiring. The method you demonstrate so eloquently in
>the article is specifically called out as likely to
>cause problems.
Yeah . . . saw that article at OSH when I stopped by
the Homebuilder's Information building on the flight
line. They had a stack of August Sport Aviations
on the counter and I picked one up to leaf through
while the three guys behind the counter were busy
with customers. I stumbled across the article on
wiring. It's got just enough good stuff in it to
be credible . . . I'm considering doing a paragraph
by paragraph review for publication on my website.
It's sad that the flagship publication of EAA can't
rise to level of being a good teacher. At least they
could get peer review of articles before they put
ink to paper.
Another disappointment at the Homebuilders Info
center. I asked the first guy who walked up if they
had any suggestions for electrical system publications
or perhaps any forums they could recommend for a neophyte
builder on electrical systems. The guy suggested I
get Tony B's books from a store in the Fly-Market.
He dug out a listing of forums and pointed to a few
programs over the next few days . . . he missed my
listing for the following day.
Not trying to knock these guys . . . they're no doubt
volunteers. Just disappointed that for all the
opportunities these folks have to be helpful
during this 7 days out of 365 window-of-opportunity
don't really know much about what's going on. Whoever
is running the Homebuilders Info Center hasn't developed
any tools to help either.
Bob . . .
---
Message 21
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| Subject: | Re: ACS switch issues for Rotax 912S |
--> AeroElectric-List message posted by: "Robert L. Nuckolls, III" <rnuckolls@aeroelectric.com>
At 11:48 AM 8/16/2004 -0700, you wrote:
>--> AeroElectric-List message posted by: Joa Harrison
><flyasuperseven@yahoo.com>
>
>
>Ok, I traced it down to the ACS ignition switch (P/N A-510-2). When I
>switch to the left side ("R") it will cut out sometimes. Not very often
>but if I do it just right then off she goes. The switch only had been
>used about 40 hours when this started showing up.
>
>It appears that it is grounding, or at least partially grounding,
>inadvertently when switched over to that "mag".
>
>Could it have to do with the diode issue that ACS mentions with regards to
>impulse coupled mags?
The diode was added to the starter contactor control circuit . . .
with totally bogus engineering behind it. See
http://www.aeroelectric.com/articles/spikecatcher.pdf
>FWIW I've wired according to Bob's notes with the shield acting as the
>ground. I was very very careful when wiring and so far this is the only
>electrical problem I've had.
>
>I've also wiggled all the wires around behind the switch (and also the
>engine) and it doesn't seem to be any of the wires. I'm guessing it's
>internal to the switch or something to do with a spike of some sort.
>
>Any other ideas before I pull the switch out and send it back to ACS?
Have you considered getting your money back and putting in toggle
switches? In my never humble opinion, key-switches suck.
Bob . . .
---
Message 22
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| Subject: | Re: New Electronic Ignition System - Being part of |
the solution
--> AeroElectric-List message posted by: Remi Khu <rkhu@kc.rr.com>
I called E-Mag asking about the interference problem with the coil's
proximity to the controllers and was assured that it has been
addressed. There has been a flying model onboard a Christen Eagle
without any problem so far.
Unfortunately this product is not yet available for an O-470 but, once
again, work is in progress for a 6-cylinder version due for release
within a year.
Remi
On Aug 16, 2004, at 11:28 AM, Robert L. Nuckolls, III wrote:
> --> AeroElectric-List message posted by: "Robert L. Nuckolls, III"
> <rnuckolls@aeroelectric.com>
>
> (See leading comments appended below)
>
> Gary Casey addressed physics of issue most elegantly . . . the key
> to a successful design is to understand and deal with all the
> problems from a standpoint of understanding. It's all simple-ideas.
> We've been putting sensitive electronics in the same box with
> ugly electronics for years. Yes, there ARE potential interference
> problems that must be addressed . . . so we put the engineer hats
> on and get it done.
>
Message 23
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| Subject: | Re: New Electronic Ignition System - Being part of |
the sol...
--> AeroElectric-List message posted by: BobsV35B@aol.com
In a message dated 8/16/04 5:48:21 PM Central Daylight Time, rkhu@kc.rr.com
writes:
Unfortunately this product is not yet available for an O-470 but, once
again, work is in progress for a 6-cylinder version due for release
within a year.
Remi
Do Not Archive
Good Evening Remi,
Just out of idle curiosity, what are you intending to use the 470 in?
Happy Skies,
Old Bob
AKA
Bob Siegfried
Ancient Aviator
Stearman N3977A
Brookeridge Airpark LL22
Downers Grove, IL 60516
630 985-8502
Do Not Archive
Message 24
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| Subject: | Re: New Electronic Ignition System - Being part of |
the sol...
--> AeroElectric-List message posted by: Remi Khu <rkhu@kc.rr.com>
Do Not Archive
Hello Bob,
The O-470 will be in a Bearhawk. I'm waiting delivery of the quick
build kit due this November. I'm anticipating a 2 year completion.
Regards,
Remi Khu
Overland Park, KS
On Aug 16, 2004, at 5:52 PM, BobsV35B@aol.com wrote:
> --> AeroElectric-List message posted by: BobsV35B@aol.com
>
>
> Do Not Archive
>
> Good Evening Remi,
>
> Just out of idle curiosity, what are you intending to use the 470 in?
>
> Happy Skies,
>
> Old Bob
> AKA
> Bob Siegfried
> Ancient Aviator
> Stearman N3977A
> Brookeridge Airpark LL22
> Downers Grove, IL 60516
> 630 985-8502
>
> Do Not Archive
Message 25
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--> AeroElectric-List message posted by: "David Schaefer" <dschaefer1@kc.rr.com>
I'm really tired of hearing the 'REAL WORLD' excuse. It's precisely today's
real world designs that have forced the experimental population to build
their own much safer systems. The designers of current electrical systems
(which haven't changed in 50 years) in the spam cans should be held
accountable for the crap they are designing and forcing on the flying public
via STC and 'Certified' systems.
Additionally, I can assure you that my displays are designed for the "real
world". Greg and company at Grand Rapids didn't fall off a truck yesterday;
all were previously Boeing engineers and avid RV builders. Grand Rapids
doesn't care about the starting surge & 're-set' only I do from a WHY SHOULD
IT HAPPEN IN THE FIRST PLACE question.
I have a primary Concorde battery sized for the starter and a slightly
smaller Odyssey (600 amp) for my secondary system. Both are allegedly
isolated from each other when the cross-feed isn't thrown per Z-14 yet the
secondary electrical system is somehow being drawn down by the starting on
the primary which should allegedly not happen.
Thanks for the answer; I'll drop off this list & call B&C in the future.
David
-----Original Message-----
From: owner-aeroelectric-list-server@matronics.com
[mailto:owner-aeroelectric-list-server@matronics.com] On Behalf Of Robert L.
Nuckolls, III
Subject: Re: AeroElectric-List: Starting Power
--> AeroElectric-List message posted by: "Robert L. Nuckolls, III"
<rnuckolls@aeroelectric.com>
At 06:02 PM 8/15/2004 -0500, you wrote:
>--> AeroElectric-List message posted by: "David Schaefer"
><dschaefer1@kc.rr.com>
>
>I'm still confused why my 'alternate' buss is being drained during
starting,
>when it should be completely isolated! The only time the two busses are
>tied together is in the event of a failure or either alternator. That
said,
>the alternate buss should be completely separate and the electronics tied
to
>that buss unaffected by starting.
>
>
>Thoughts?
>
>
>David
I presume you're talking about a figure Z-14 system.
If you have electronics that are not designed to live in the
real world of aircraft electrical systems that require
isolated battery support during engine cranking . . . then
you'll have to design a system with a main battery sized for
cranking. The aux battery can be same size or much smaller
because you DON't close the crossfeed contactor for cranking.
Bob . . .
---
Message 26
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| Subject: | Re: New Electronic Ignition System - Being part of |
the sol...
--> AeroElectric-List message posted by: BobsV35B@aol.com
Do Not Archive
In a message dated 8/16/04 6:31:18 PM Central Daylight Time, rkhu@kc.rr.com
writes:
The O-470 will be in a Bearhawk. I'm waiting delivery of the quick
build kit due this November. I'm anticipating a 2 year completion
Good Evening Remi,
Have you considered using a 550 instead of a 470?
A 550 can be used anywhere that a 470 has ever been used!
I am sure you could find a 470 at a lot lower cost than you could a 550, but
the IO-550-B Continental weighs less than an IO-470-N. It will fit in the
same place and use the same exhaust and intake plumbing.
It takes different baffling and has a little more heat to get rid of, but
that is not a bad deal at all.
There are a few lower HP versions of the 470 that do weigh less than a 550,
but the majority of those models weigh the same or more than a 550. Modern
engineering has made all that power available in the same or smaller package.
Not only that, there are more new modern propellor options available.
It seems a shame to do all the work it would take to install a 470 when a
550 takes no more effort. A lot more money, but no more effort.
The extra power is a benefit, with very few, if any, negatives. There is no
extra structure involved and it will burn no more fuel than a 470 if the
same powers are used. In fact, we have found that most any aircraft that is
converted from a 470 to a 550 will either get where it wants to go faster or
burn less fuel doing it
Using a 550 instead of a 470 is one of those very few win -- win situations.
If there is any way you could manage the acquisition cost, I think you would
find the benefits to be remarkable.
I consider the money I spent switching to the larger engine to be the best
money I have ever spent on my airplane.
Happy Skies,
Old Bob
AKA
Bob Siegfried
Ancient Aviator
Stearman N3977A
Brookeridge Airpark LL22
Downers Grove, IL 60516
630 985-8502
Do Not Archive
Message 27
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| Subject: | Re: Strobe noise |
--> AeroElectric-List message posted by: Charlie England <ceengland@bellsouth.net>
How about:
http://www.speakercity.com/xover/coils.shtml
I don't know if this is applicable to filters for DC power circuits, but
for years speaker manufacturers (low frequency AC signals) avoided iron
core inductors because of saturation concerns. Then testing got
sophisticated enough to determine that the iron core just needed to be
big enough & saturation problems could be avoided.
At any rate, there are air core inductors listed on this site. For more
results, Google 'speaker crossover components'.
Charlie
Peter Laurence wrote:
>--> AeroElectric-List message posted by: Peter Laurence <dr.laurence@mbdi.org>
>
>The Shack has a filter (770-0055) which has a .7 uH inductor with two
>caps.as opposed to the (270-030A). which has a 1.9uH inductor.
>
>If I can't find one left on the shelf, I'm going to try the 770-0055 on a
>noisy electric HSI..
>
>Let you know how it turns out.
>
>
>Peter
>RV9A
>waiting for wings
>
>
>
>
>>>On> >
>>>
>>>
>>>>Never the less, Radio Shack has discontinued the
>>>>270-030 filter choke. They only offer new electronic
>>>>versions, don't know if these will work the same or
>>>>not. I would like to confirm that the electronic type
>>>>will work or have part numbers for the choke and
>>>>capacitor from another vendor.
>>>>
>>>>
>>>Since the value of the choke is not all that critical, if you need a
>>>choke you can use one winding of a transformer. Use a transformer with
>>>a secondary voltage something like 6.3VAC, 12VAC, or 24VAC. The higher
>>>the voltage rating of the secondary, the greater the inductance. Make
>>>sure that the current rating of the secondary is sufficient to carry
>>>the load. Do not short the primary winding or the inductance of your
>>>ersatz choke will decrease.
>>>
>>>
>> I considered this alternative. Problem is that filter
>> chokes like the one offered in the 270-030 kit have
>> air-gaps in the core to prevent core saturation. AC
>> transformers don't have or need the air-core . . . they'll
>> saturate as some level of DC current flow that could
>> degrade the filtering effects if not render it useless.
>>
>> I'll try to do some bench testing on specific parts
>> from Radio Shack to quantify their usefulness.
>>
>> Bob . . .
>>
>>
>>---
>>
>>
>>
>>
Message 28
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| Subject: | Re: AeroElectric-List Digest: 17 Msgs - 08/15/04 |
0.7 RCVD_BY_IP Received by mail server with no name
--> AeroElectric-List message posted by: "Dale Alexander" <Dalexan48@dslextreme.com>
Hello John,
My second job is with a company called Balco. It is a division of Snap-on
Tools. I write troubleshooting info for automotive techs to use while
diagnosing vehicles. One of the tests that we list in our product called
Vantage is for Knock Sensors. What we (and several manufactures) look for is
not only a voltage to reach a certain value, but a certain frequency as
well. Toyota for example lists resonant frequencies of 7,000, 7,100 and
7,600 Hz depending on which engine is being monitored. So one needs to be
careful that the sensor characteristics are matched to the engine or you may
never find the correct signal to input to your amplifier or it may not reach
a level to be of any use.
Hope this helps,
Dale Alexander
Velocity 173 Stealth Gullwing
>
> Time: 05:10:17 AM PST US
> From: "John Slade" <sladerj@bellsouth.net>
> Subject: AeroElectric-List: Listening to a knock sensor
>
> --> AeroElectric-List message posted by: "John Slade"
<sladerj@bellsouth.net>
>
> I'd like to have the option to listen to my knock sensor over the
intercom.
> I understand that a knock sensor is basically a condenser mike that's
> attached to the engine.
>
> Any thoughts?
> John Slade
>
Message 29
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| Subject: | Re: Strobe noise |
--> AeroElectric-List message posted by: plaurence@the-beach.net
On 16 Aug 2004 at 19:23, Charlie England wrote:
Thanks Charlie,
they seem to have the replacement for the discontinued RadioSHOT part
Peter
> --> AeroElectric-List message posted by: Charlie England
> <ceengland@bellsouth.net>
>
> How about:
>
> http://www.speakercity.com/xover/coils.shtml
>
> I don't know if this is applicable to filters for DC power circuits,
> but for years speaker manufacturers (low frequency AC signals) avoided
> iron core inductors because of saturation concerns. Then testing got
> sophisticated enough to determine that the iron core just needed to be
> big enough & saturation problems could be avoided.
>
> At any rate, there are air core inductors listed on this site. For
> more results, Google 'speaker crossover components'.
>
> Charlie
>
> Peter Laurence wrote:
>
> >--> AeroElectric-List message posted by: Peter Laurence
> ><dr.laurence@mbdi.org>
> >
> >The Shack has a filter (770-0055) which has a .7 uH inductor with
> >two caps.as opposed to the (270-030A). which has a 1.9uH inductor.
> >
> >If I can't find one left on the shelf, I'm going to try the 770-0055
> >on a noisy electric HSI..
> >
> >Let you know how it turns out.
> >
> >
> >Peter
> >RV9A
> >waiting for wings
> >
> >
> >
> >
> >>>On> >
> >>>
> >>>
> >>>>Never the less, Radio Shack has discontinued the
> >>>>270-030 filter choke. They only offer new electronic
> >>>>versions, don't know if these will work the same or
> >>>>not. I would like to confirm that the electronic type
> >>>>will work or have part numbers for the choke and
> >>>>capacitor from another vendor.
> >>>>
> >>>>
> >>>Since the value of the choke is not all that critical, if you need
> >>>a choke you can use one winding of a transformer. Use a
> >>>transformer with a secondary voltage something like 6.3VAC, 12VAC,
> >>>or 24VAC. The higher the voltage rating of the secondary, the
> >>>greater the inductance. Make sure that the current rating of the
> >>>secondary is sufficient to carry the load. Do not short the
> >>>primary winding or the inductance of your ersatz choke will
> >>>decrease.
> >>>
> >>>
> >> I considered this alternative. Problem is that filter
> >> chokes like the one offered in the 270-030 kit have
> >> air-gaps in the core to prevent core saturation. AC
> >> transformers don't have or need the air-core . . . they'll
> >> saturate as some level of DC current flow that could
> >> degrade the filtering effects if not render it useless.
> >>
> >> I'll try to do some bench testing on specific parts
> >> from Radio Shack to quantify their usefulness.
> >>
> >> Bob . . .
> >>
> >>
> >>---
> >>
> >>
> >>
> >>
>
>
> advertising on the Matronics Forums.
> http://www.matronics.com/chat
> ====
>
>
>
>
Message 30
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| Subject: | Re: Where do I start? |
--> AeroElectric-List message posted by: "jrstone" <jrstone@insightbb.com>
Hey Bob Nuckolls,
I just downloaded you cd and the file with the cad programs in it didn't
include the one you like, auto cad lt. Can you tell me where you have that
program saved? It wasn't in the auto cad drawing file either.
Thanks,
Jim
----- Original Message -----
From: "Robert L. Nuckolls, III" <bob.nuckolls@cox.net>
Subject: AeroElectric-List: Where do I start?
> --> AeroElectric-List message posted by: "Robert L. Nuckolls, III"
<bob.nuckolls@cox.net>
>
>
> > Bob,
> > Reading your book and other scamatics I suppose should be easy, but
> > without an appendix, and index in picture form what all these symbles
> > represent, I am spending (wasting) a lot of time. Help me out here will
> > you, please? Where can I go for help here? A special book? Tell me, I'll
> > buy it!
>
> Other than Tony B's books, I'm unaware of any 'cook-book' approaches
> to system architecture and fabrication. The 'Connection is the
recommended
> starting point. The drawing "seminar.dwg" found on the CD cited below
> has a lot of your wiring diagram already drawn . . . ready for you to
> keep, modify, discard or add to as you see fit.
>
> > Can you recommend a cheap software for me to use to create my own
> > electrical system documentation? One which might have all these symbles
I
> > could just drop in? I don't want to spend a fortune on some 3D Cad
> > system, please.
>
> The CD we offer contains an image of my website before the parts
> business was transferred to B&C several years ago. Most of the parts
> in the drawings are illustrated in figures and descriptions of the
parts
> catalog.
>
> The CD also has three CAD programs that will open, edit and print
> drawings included on the CD. There's a wirebook in progress that
> probably has 90% of the work for your wirebook already done. Feel
> free to use these materials in any way useful to you. My personal
> preference of the three CAD programs
> is AutoCAD LT 1.0 for windows. You need 4 clean floppies. Execute
> "makeset.bat"
> from the CD and the program will generate 4 pristine install disks for
> the software. The price is hard to beat . . . if you have a high
> speed Internet connection, you can download the CD at no charge from:
>
> http://www.aeroelectric.com/CD/AEC8_0.zip
>
> I think you're suffering a malady common to first time builders.
> It's a sort of can't see the "trees for the forest" syndrome.
> Looking at the whole task makes it difficult to sort out the
> dozens of simple-ideas that get stacked up like Tinker-Toys
> and Legos to configure the system of your dreams. The starting
> point must be to acquire an understanding of the Tinker-Toys.
>
> 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.
> A further benefit can be realized with membership on
> the list. There are lots of technically capable folks
> on the list who can offer suggestions too. You can
> join at . . .
>
> http://www.matronics.com/subscribe/
>
> In the final analysis, if you don't find any of our offerings
> to be of value to you, just let me know. I'll refund your money
> and you can keep the book.
>
> Regards,
>
> Bob . . .
>
> --------------------------------------------
> ( Knowing about a thing is different than )
> ( understanding it. One can know a lot )
> ( and still understand nothing. )
> ( C.F. Kettering )
> --------------------------------------------
>
>
Message 31
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| Subject: | Re: Multiple power feed wiring problem . . . |
--> AeroElectric-List message posted by: Ernest Christley <echristley@nc.rr.com>
Robert L. Nuckolls, III wrote:
> --> AeroElectric-List message posted by: "Robert L. Nuckolls, III" <rnuckolls@aeroelectric.com>
>
> At 02:17 PM 8/16/2004 -0400, you wrote:
>
>
>>--> AeroElectric-List message posted by: echristley@nc.rr.com
>>
>>
>>----- Original Message -----
>>From: "Robert L. Nuckolls, III" <bob.nuckolls@cox.net>
>>Date: Monday, August 16, 2004 1:21 pm
>>Subject: AeroElectric-List: Multiple power feed
>>wiring problem . . .
>>
>>
>>> I've expanded an article I did on the website
>>
>>so that
>>
>>> it speaks specifically to your question. If it were
>>> my airplane, I'd use a PIDG splice to fan out the
>>> single power feed wire to seven instruments as
>>
>>shown
>>
>>> here:
>>>
>>>
>>
>>http://www.aeroelectric.com/articles/multiplewires/multiplewires.html
>>
>>> Bob . . .
>>>
>>
>>
>>Bob, you may already be aware of it, but this
>>month's Sport Aviation has an article on aircraft
>>wiring. The method you demonstrate so eloquently in
>>the article is specifically called out as likely to
>>cause problems.
>
>
> Yeah . . . saw that article at OSH when I stopped by
> the Homebuilder's Information building on the flight
> line. They had a stack of August Sport Aviations
> on the counter and I picked one up to leaf through
> while the three guys behind the counter were busy
> with customers. I stumbled across the article on
> wiring. It's got just enough good stuff in it to
> be credible . . . I'm considering doing a paragraph
> by paragraph review for publication on my website.
> It's sad that the flagship publication of EAA can't
> rise to level of being a good teacher. At least they
> could get peer review of articles before they put
> ink to paper.
I would really appreciate that review. And I will put my vote in for
peer review. I think it is the best thing they could possibly do. All
serious educational publication, ie scientific journals, have peer review.
--
http://www.ernest.isa-geek.org/
"Ignorance is mankinds normal state,
alleviated by information and experience."
Veeduber
Message 32
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--> AeroElectric-List message posted by: "Jeff Orear" <jorear@new.rr.com>
List:
I am having trouble with my PS Engineering PMA 4000 audio panel in that I get no
side tone with either radio (Icom AC200 and Narco Escort II) that I have running
through it.
Intercom works fine, and I get indications on both radios (not at the same time)
that I am transmitting, as well as indication on the audio panel that either
com 1 or com 2 is transmitting.
I have also tried to increase the volume for the sidetone on the Narco Escort II,
but adjusting the pot makes no difference.
I have not mounted my antennae yet, but a temporary hookup does not produce a received
transmission on my handheld.
Also, when I have the PMA 4000 in failsafe (Off mode), I get a transmission indicator
on the radio without keying the PTT.
Could all this be the result of a relatively low voltage on the main buss? I am
getting a reading of 11.25 volts at present. I am wondering if this is some
sort of voltage saving feature of the audio panel?? My Icom handheld will still
receive on low voltage but will not transmit. Is this a similar thing for
the audio panel?
I have yet to charge up my Odyssey battery since its delivery. Worth a try before
I tear into my wiring harness??
Thanks for the help folks. Boy....do I feel helpless right now....
Regards,
Jeff Orear
RV6A N782P (reserved)
firewall forward etc
Peshtigo, WI
Message 33
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| Subject: | single antenna for Narco 140 |
--> AeroElectric-List message posted by: "Jaye and Scott Jackson" <jayeandscott@telus.net>
Bob:
Thanks for the thoughtful answers to my previous posts regarding the dancing
ammeter, et al. I will replace the regulator 12V+ wire with a heavier one and
let you know how it works when I get the aircraft back together enough to run
it.
I purchased a used Narco 140 ADF without realizing that it came with a separate
sense antenna as well as the usual "boat hull" for the fuselage bottom.
Is there anyway to get the receiver/indicator to work without installing the
sense antenna?
Thanks again,
Scott in VAncouver
RV-6, 150 hours and holding
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