Today's Message Index:
----------------------
1. 02:02 AM - Re: "scratchy" transmission (RV_10)
2. 02:56 AM - Re: "scratchy" transmission (luckymacy@comcast.net (lucky))
3. 05:38 AM - Jabiru Alternator Wiring (Noel Karppinen)
4. 06:06 AM - Re: Re: Wire (MauleDriver)
5. 06:45 AM - Re: Jabiru Alternator Wiring (Ken)
6. 06:55 AM - Re: Music Inputs (John McKiernan)
7. 09:32 AM - Re: Re: Wire (Robert L. Nuckolls, III)
8. 09:32 AM - Re: Re: Wire (Robert L. Nuckolls, III)
9. 09:32 AM - Re: Transponder antenna in rag/tube aircraft (Robert L. Nuckolls, III)
10. 02:22 PM - Re: Jabiru Alternator Wiring (Peter Harris)
11. 02:23 PM - Re: Transponder antenna in rag/tube aircraft (Peter Harris)
12. 04:59 PM - Re: Jabiru Alternator Wiring (Ken)
13. 05:39 PM - GMA 340 Audio Panel and Garmin 496 (Emrath)
14. 06:18 PM - Got a new toy . . . (Robert L. Nuckolls, III)
15. 08:13 PM - Re: Jabiru Alternator Wiring (Peter Harris)
16. 08:21 PM - Re: EMag (Robert L. Nuckolls, III)
17. 11:05 PM - Re: GMA 340 Audio Panel and Garmin 496 (Dave Saylor)
Message 1
INDEX | Back to Main INDEX |
NEXT | Skip to NEXT Message |
LIST | Reply to LIST Regarding this Message |
SENDER | Reply to SENDER Regarding this Message |
|
Subject: | "scratchy" transmission |
Hi,
I have just had exactly the same issue with my XCOM 760. I sent my unit
back
to the factory ' excellent service and quick turnaround. There was a
solder
joint on the board inside that had come adrift.
John Cleary
_____
From: owner-aeroelectric-list-server@matronics.com
[mailto:owner-aeroelectric-list-server@matronics.com] On Behalf Of lucky
Sent: Thursday, 4 October 2007 1:56 PM
Subject: AeroElectric-List: "scratchy" transmission
I noticed Van's is now selling a radio monitor so you can hear you
transmission. HYPERLINK
"http://www.vansaircraft.com/cgi-bin/catalog.cgi?ident=1191469174-304-2
79&br
owse=new&product=radio-monitor"http://www.vansaircraft.com/cgi-bin/ca
talog.c
gi?ident=1191469174-304-279&browse=new&product=radio-monitor
One of the descriptions says to be able to check for 'scratchy'
transmission. Well, 2 flights ago people started to tell me my
transmissions were becoming scratchy once the engine is running and the
range is short but OK prior to engine start even though the intercom
continues to work like a champ all the time and I can still hear others
quite well and from a long distance regardless of what else is on or off
that I can control with respect to avionics and engine. Anyone have
enough
hands on experience to know what the most probable causes of that are?
I
have tried the following with no luck:
changed RG400 cables between TX and Antenna, tried to transmit with
different headsets and from both pilot/copilot positions, ensured all
the
ground connectors FWF and in the avionics area appear to be 'normal',
ensured the headset jacks were still snug and no obvious connector
problems,
and checked the antenna inside the plane and outside the plane. I'd
have
swapped radios if one was available.
my radio is an XCOM760
"http://www.matronics.com/Navigator?AeroElectric-List"http://www.matronic
s.c
om/Navigator?AeroElectric-List
"http://forums.matronics.com"http://forums.matronics.com
7/10/2007
6:12 PM
7/10/2007
6:12 PM
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: | "scratchy" transmission |
Thanks bud, that's exactly the kind of "special insight" I was looking for!
lucky
-------------- Original message --------------
From: "RV_10" <john_rv10@yahoo.com>
Hi,
I have just had exactly the same issue with my XCOM 760. I sent my unit back to
the factory excellent service and quick turnaround. There was a solder joint
on the board inside that had come adrift.
John Cleary
From: owner-aeroelectric-list-server@matronics.com [mailto:owner-aeroelectric-list-server@matronics.com] On Behalf Of lucky
Sent: Thursday, 4 October 2007 1:56 PM
Subject: AeroElectric-List: "scratchy" transmission
I noticed Van's is now selling a radio monitor so you can hear you transmission. http://www.vansaircraft.com/cgi-bin/catalog.cgi?ident=1191469174-304-279&browse=new&product=radio-monitor
One of the descriptions says to be able to check for 'scratchy' transmission.
Well, 2 flights ago people started to tell me my transmissions were becoming scratchy
once the engine is running and the range is short but OK prior to engine
start even though the intercom continues to work like a champ all the time
and I can still hear others quite well and from a long distance regardless of
what else is on or off that I can control with respect to avionics and engine.
Anyone have enough hands on experience to know what the most probable causes
of that are? I have tried the following with no luck:
changed RG400 cables between TX and Antenna, tried to transmit with different headsets
and from both pilot/copilot positions, ensured all the ground connectors
FWF and in the avionics area appear to be 'normal', ensured the headset jacks
were still snug and no obvious connector problems, and checked the antenna
inside the plane and outside the plane. I'd have swapped radios if one was available.
my radio is an XCOM760
7/10/2007 6:12 PM
7/10/2007 6:12 PM
<html><body>
<DIV>Thanks bud, that's exactly the kind of "special insight" I was looking
for!</DIV>
<DIV> </DIV>
<DIV>lucky</DIV>
<DIV> </DIV>
<BLOCKQUOTE style="PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: #1010ff 2px
solid">-------------- Original message -------------- <BR>From: "RV_10" <john_rv10@yahoo.com>
<BR>
<META content="Microsoft Word 11 (filtered medium)" name=Generator>
<STYLE>
v\:* {behavior:url(#default#VML);}
o\:* {behavior:url(#default#VML);}
w\:* {behavior:url(#default#VML);}
.shape {behavior:url(#default#VML);}
</STYLE>
<STYLE>
<!--
/* Font Definitions */
@font-face
{font-family:Tahoma;
panose-1:2 11 6 4 3 5 4 4 2 4;}
/* Style Definitions */
p.MsoNormal, li.MsoNormal, div.MsoNormal
{margin:0cm;
margin-bottom:.0001pt;
font-size:12.0pt;
font-family:"Times New Roman";}
a:link, span.MsoHyperlink
{color:blue;
text-decoration:underline;}
a:visited, span.MsoHyperlinkFollowed
{color:blue;
text-decoration:underline;}
pre
{margin:0cm;
margin-bottom:.0001pt;
font-size:10.0pt;
font-family:"Courier New";}
span.EmailStyle18
{mso-style-type:personal-reply;
font-family:"Times New Roman";
color:blue;
font-weight:normal;
font-style:normal;
text-decoration:none none;}
@page Section1
{size:595.3pt 841.9pt;
margin:72.0pt 90.0pt 72.0pt 90.0pt;}
div.Section1
{page:Section1;}
-->
</STYLE>
<DIV class=Section1>
<P class=MsoNormal><FONT face="Times New Roman" color=blue size=4><SPAN style="FONT-SIZE:
14pt; COLOR: blue">Hi,<?xml:namespace prefix = o ns = "urn:schemas-microsoft-com:office:office"
/><o:p></o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face="Times New Roman" color=blue size=4><SPAN style="FONT-SIZE:
14pt; COLOR: blue"><o:p> </o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face="Times New Roman" color=blue size=4><SPAN style="FONT-SIZE:
14pt; COLOR: blue">I have just had exactly the same issue with my XCOM
760. I sent my unit back to the factory excellent service and quick turnaround.
There was a solder joint on the board inside that had come adrift. <o:p></o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face="Times New Roman" color=blue size=4><SPAN style="FONT-SIZE:
14pt; COLOR: blue"><o:p> </o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face="Times New Roman" color=blue size=4><SPAN style="FONT-SIZE:
14pt; COLOR: blue">John Cleary<o:p></o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face="Times New Roman" color=blue size=4><SPAN style="FONT-SIZE:
14pt; COLOR: blue"><o:p> </o:p></SPAN></FONT></P>
<DIV>
<DIV class=MsoNormal style="TEXT-ALIGN: center" align=center><FONT face="Times
New Roman" size=3><SPAN lang=EN-US style="FONT-SIZE: 12pt">
<HR tabIndex=-1 align=center width="100%" SIZE=2>
</SPAN></FONT></DIV>
<P class=MsoNormal><B><FONT face=Tahoma size=2><SPAN lang=EN-US style="FONT-WEIGHT: bold; FONT-SIZE: 10pt; FONT-FAMILY: Tahoma">From:</SPAN></FONT></B><FONT face=Tahoma size=2><SPAN lang=EN-US style="FONT-SIZE: 10pt; FONT-FAMILY: Tahoma"> owner-aeroelectric-list-server@matronics.com [mailto:owner-aeroelectric-list-server@matronics.com] <B><SPAN style="FONT-WEIGHT: bold">On Behalf Of </SPAN></B>lucky<BR><B><SPAN style="FONT-WEIGHT: bold">Sent:</SPAN></B> Thursday, 4 October 2007 1:56 PM<BR><B><SPAN style="FONT-WEIGHT: bold">To:</SPAN></B> aeroelectric-list@matronics.com<BR><B><SPAN style="FONT-WEIGHT: bold">Subject:</SPAN></B> AeroElectric-List: "scratchy" transmission</SPAN></FONT><SPAN lang=EN-US><o:p></o:p></SPAN></P></DIV>
<P class=MsoNormal><FONT face="Times New Roman" size=3><SPAN style="FONT-SIZE:
12pt"><o:p> </o:p></SPAN></FONT></P>
<DIV>
<P class=MsoNormal><FONT face="Times New Roman" size=3><SPAN style="FONT-SIZE: 12pt">I noticed Van's is now selling a radio monitor so you can hear you transmission. <A href="http://www.vansaircraft.com/cgi-bin/catalog.cgi?ident=1191469174-304-279&browse=new&product=radio-monitor">http://www.vansaircraft.com/cgi-bin/catalog.cgi?ident=1191469174-304-279&browse=new&product=radio-monitor</A><o:p></o:p></SPAN></FONT></P></DIV>
<DIV>
<P class=MsoNormal><FONT face="Times New Roman" size=3><SPAN style="FONT-SIZE:
12pt"> <o:p></o:p></SPAN></FONT></P></DIV>
<DIV>
<P class=MsoNormal><FONT face="Times New Roman" size=3><SPAN style="FONT-SIZE:
12pt">One of the descriptions says to be able to check for 'scratchy' transmission.
Well, 2 flights ago people started to tell me my transmissions were
becoming scratchy once the engine is running and the range is short but
OK prior to engine start even though the intercom continues to work like
a champ all the time and I can still hear others quite well and from a long distance
regardless of what else is on or off that I can control with respect to
avionics and engine. Anyone have enough hands on experience to know what
the most probable causes of that are? I have tried the following with
no luck:<o:p></o:p></SPAN></FONT></P></DIV>
<DIV>
<P class=MsoNormal><FONT face="Times New Roman" size=3><SPAN style="FONT-SIZE:
12pt"> <o:p></o:p></SPAN></FONT></P></DIV>
<DIV>
<P class=MsoNormal><FONT face="Times New Roman" size=3><SPAN style="FONT-SIZE:
12pt">changed RG400 cables between TX and Antenna, tried to transmit with different
headsets and from both pilot/copilot positions, ensured all the ground connectors FWF
and in the avionics area appear to be 'normal', ensured the
headset jacks were still snug and no obvious connector problems, and checked
the antenna inside the plane and outside the plane. I'd have swapped radios
if one was available.<o:p></o:p></SPAN></FONT></P></DIV>
<DIV>
<P class=MsoNormal><FONT face="Times New Roman" size=3><SPAN style="FONT-SIZE:
12pt"> <o:p></o:p></SPAN></FONT></P></DIV>
<DIV>
<P class=MsoNormal><FONT face="Times New Roman" size=3><SPAN style="FONT-SIZE:
12pt">my radio is an XCOM760<o:p></o:p></SPAN></FONT></P></DIV><PRE><B><FONT face="Courier
New" color=black size=2><SPAN style="FONT-WEIGHT: bold; FONT-SIZE:
10pt; COLOR: black"><o:p> </o:p></SPAN></FONT></B></PRE><PRE><B><FONT face="Courier
New" color=black size=2><SPAN style="FONT-WEIGHT: bold; FONT-SIZE:
10pt; COLOR: black"><o:p> </o:p></SPAN></FONT></B></PRE><PRE><B><FONT face="Courier
New" color=black size=2><SPAN style="FONT-SIZE: 10pt; COLOR: black;
o: p></o:p></span></font></b></pre><pre><b><font
size=2 color=black face='Courier New'><span style=" -<o:p Forum Email AeroElectric-List
The - bsp; font-size:10.0pt;color:black;></SPAN></FONT></B></PRE><PRE><B><FONT
face="Courier New" color=black size=2><SPAN style="FONT-SIZE: 10pt;
COLOR: black; browse: p></o:p></span></font></b></pre><pre><b><font
size=2 color=black face='Courier New'><span style=" font-size:10.0pt;color:black;
page,<o:p Subscriptions></SPAN></FONT></B></PRE><PRE><B><FONT face="Courier
New" color=black size=2><SPAN style="FONT-SIZE: 10pt; COLOR: black; Chat: p></o:p></span></font></b></pre><pre><b><font
size=2 color=black face='Courier New'><span style=" font-size:10.0pt;color:black; more:<o:p></SPAN></FONT></B></PRE><PRE><B><FONT face="Courier New" color=black size=2><SPAN style="FONT-SIZE: 10pt; COLOR: black; href: 'http://www.matronics.com/Navigator?AeroElectric-List'>http://www.matronics.com/Navigator?AeroElectric-List</a><o:p></o:p></span></font></b></pre><pre><b><font
size=2 color=black face='Courier New'><span style=" font-size:10.0pt;color:black;="================<o:p"></SPAN></FONT></B></PRE><PRE><B><FONT
face="Courier
New" color=black size=2><SPAN style="FONT-SIZE: 10pt; COLOR: black; -: p></o:p></span></font></b></pre><pre><b><font
size=2 color=black face='Courier New'><span style=; bsp: " font-size:10.0pt;color:black; Forums!<o:p Web></SPAN></FONT></B></PRE><PRE><B><FONT face="Courier New" color=black size=2><SPAN style="FONT-SIZE: 10pt; COLOR: black; href: 'http://forums.matronics.com'>http://forums.matronics.com</a><o:p></o:p></span></font></b></pre><pre><b><font
size=2 color=black face='Courier New'><span style=" font-size:10.0pt;color:black;="================<o:p"></SPAN></FONT></B></PRE><PRE><B><FONT
face="Courier
New" color=black size=2><SPAN style="FONT-WEIGHT: bold; FONT-SIZE: 10pt; COLOR:
black"><o:p> </o:p></SPAN></FONT></B></PRE></DIV><BR>7/10/2007 6:12 PM<BR></FONT>
<P></P><BR>7/10/2007 6:12 PM<BR></FONT>
<P></P><PRE><B><FONT face="courier new,courier" size=2 color000000?>
</B></FONT></PRE></BLOCKQUOTE>
<pre><b><font size=2 color="#000000" face="courier new,courier">
</b></font></pre></body></html>
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: | Jabiru Alternator Wiring |
I am at the stage of planning the wiring for a Jabiru 3300 installation. It
is one of the late model engines using the single phase alternator with a
Kubota RP201-53710 regulator. The aircraft will be used for night VFR
operations, so we want to be able to isolate the alternator and run on
battery power only in the event of alternator problems.
I am only just starting to come to grips with the pecularities of PM
alternators. After having been given a reference to this site and the
Aeroelectric Connection by a friend, I have spent the last few days
scanning the list and reading the book. This has clarified a number of
things, but I still have a few questions which, based on what I have seen
here so far, I am sure someone will be able to answer.
I have seen a number of references to problems with load dumping if the
alternator is disconnected from the battery. Is this a problem with PM
alternators or only wound field ones?
The simple Jabiru schematic in Figure Z-20 would appear to use the same
regulator looking at the pin-outs and wire colours, and would seem to meet
our requirement. Is the electrolytic capacitor at the output of the
regulatorfor noise filtering, or is it related to the load dumping
problem?
I have also seen a couple of schematics on builders web sites with slightly
different approaches. One used the alternator switch to both disconnect
the regulator sense line from the main bus and control a relay connecting
the regulator output line to the main bus, but no capacitor. The other had
a relay only in the regulator output line. The sense line was left
connected to the main bus, and would therefore have still been at +12V (
at least until the battery discharged) if the alternator switch was
opened. Once again, no capacitor. What are the advantages or problems
associated with these approaches?
Regards
Noel Karppinen
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 |
|
DJ, I bought a Christmas basket of tools and connectors from Terminal
Town a while ago. I don't know enough to recommend anything but next
time you come by you'll have to take a look. One connector kit
contained a good selection of ring terminals and crimp on connectors.
The other kit a selection of Molex connectors. All the tools are
Eclipse brand. Spent about $400 including some tools I'm sure you
already have.
Dj Merrill wrote:
>
> Bob,
> What would you recommend, and where to get a decent set of tools to
> work with Molex connectors? Crimper, extraction tool, etc.
>
> Christmas is coming up and I'm starting to make out my list... *grin*
>
> Thanks!
>
> -Dj
>
>
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 |
|
Subject: | Re: Jabiru Alternator Wiring |
Hello Noel
I believe there are no load dump issues with PM alternators. The
capacitor is for noise I think mostly for running without a battery in
the circuit. My architecture never does that and since the capacitor
didn't make any difference for me I eliminated it. I have a relay
between the alternator and the regulator for control and overvolt
cutoff. It does not take a robust contactor there as it is AC current
and that relay also lets me kill power to a misbehaving regulator. The
B+ output of the regulator has a CB (a fuse would be fine) to protect
against excess battery current going into a misbehaving regulator. My
control switch does control the relay and provide power to the
regulator. Some regulators draw a bit of current when not in use but
regardless I want to shut off that wire on a misbehaving regulator. If
you've detected a theme here - yes the regulator tends to be the most
failure prone component so mine is on the cool side of the firewall
where it gets warm to the touch but not hot.
Ken
Noel Karppinen wrote:
> I am at the stage of planning the wiring for a Jabiru 3300
> installation. It is one of the late model engines using the single
> phase alternator with a Kubota RP201-53710 regulator. The aircraft
> will be used for night VFR operations, so we want to be able to
> isolate the alternator and run on battery power only in the event of
> alternator problems.
>
> I am only just starting to come to grips with the pecularities of PM
> alternators. After having been given a reference to this site and the
> Aeroelectric Connection by a friend, I have spent the last few days
> scanning the list and reading the book. This has clarified a number
> of things, but I still have a few questions which, based on what I
> have seen here so far, I am sure someone will be able to answer.
>
> I have seen a number of references to problems with load dumping if
> the alternator is disconnected from the battery. Is this a problem
> with PM alternators or only wound field ones?
>
> The simple Jabiru schematic in Figure Z-20 would appear to use the
> same regulator looking at the pin-outs and wire colours, and would
> seem to meet our requirement. Is the electrolytic capacitor at the
> output of the regulatorfor noise filtering, or is it related to the
> load dumping problem?
>
> I have also seen a couple of schematics on builders web sites with
> slightly different approaches. One used the alternator switch to both
> disconnect the regulator sense line from the main bus and control a
> relay connecting the regulator output line to the main bus, but no
> capacitor. The other had a relay only in the regulator output line.
> The sense line was left connected to the main bus, and would therefore
> have still been at +12V ( at least until the battery discharged) if
> the alternator switch was opened. Once again, no capacitor. What are
> the advantages or problems associated with these approaches?
>
> Regards
>
> Noel Karppinen
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: Music Inputs |
Tip = Right
Ring = Left
Barrel = Common (Low)
Rocky
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 |
|
At 08:56 AM 10/8/2007 -0400, you wrote:
>
>DJ, I bought a Christmas basket of tools and connectors from Terminal Town
>a while ago. I don't know enough to recommend anything but next time you
>come by you'll have to take a look. One connector kit contained a good
>selection of ring terminals and crimp on connectors.
>The other kit a selection of Molex connectors. All the tools are Eclipse
>brand. Spent about $400 including some tools I'm sure you already have.
Are the terminals PIDG style. I.e. three piece with the
metal liners inside the insulation-grip sleeves?
See:
http://www.aeroelectric.com/articles/terminal.pdf
Bob . . .
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 |
|
At 10:43 PM 10/7/2007 -0400, you wrote:
>
>Bob,
> What would you recommend, and where to get a decent set of tools to
>work with Molex connectors? Crimper, extraction tool, etc.
http://steinair.com
http://bandc.biz
Bob . . .
----------------------------------------
( "Problems are the price of progress. )
( Don't bring me anything but trouble. )
( Good news weakens me." )
( -Charles F. Kettering- )
----------------------------------------
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: | Transponder antenna in rag/tube aircraft |
At 09:40 AM 10/8/2007 +1000, you wrote:
><peterjfharris@bigpond.com>
>
>Related question please.
>In my glass hull I fitted the transponder antenna about 4" inside the
>perimeter of the circular VHF ground plane ie it shares this ground plane.
>Is that a No-No?
>Thanks
>Peter H
it will probably be fine.
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: | Jabiru Alternator Wiring |
Ken,
Can you advise details of the AC relay and its connections? (Sometimes a 20A
fuse is used there)
Thanks
Peter H
-----Original Message-----
From: owner-aeroelectric-list-server@matronics.com
[mailto:owner-aeroelectric-list-server@matronics.com] On Behalf Of Ken
Sent: Monday, 8 October 2007 11:44 PM
Subject: Re: AeroElectric-List: Jabiru Alternator Wiring
Hello Noel
I believe there are no load dump issues with PM alternators. The
capacitor is for noise I think mostly for running without a battery in
the circuit. My architecture never does that and since the capacitor
didn't make any difference for me I eliminated it. I have a relay
between the alternator and the regulator for control and overvolt
cutoff. It does not take a robust contactor there as it is AC current
and that relay also lets me kill power to a misbehaving regulator. The
B+ output of the regulator has a CB (a fuse would be fine) to protect
against excess battery current going into a misbehaving regulator. My
control switch does control the relay and provide power to the
regulator. Some regulators draw a bit of current when not in use but
regardless I want to shut off that wire on a misbehaving regulator. If
you've detected a theme here - yes the regulator tends to be the most
failure prone component so mine is on the cool side of the firewall
where it gets warm to the touch but not hot.
Ken
Noel Karppinen wrote:
> I am at the stage of planning the wiring for a Jabiru 3300
> installation. It is one of the late model engines using the single
> phase alternator with a Kubota RP201-53710 regulator. The aircraft
> will be used for night VFR operations, so we want to be able to
> isolate the alternator and run on battery power only in the event of
> alternator problems.
>
> I am only just starting to come to grips with the pecularities of PM
> alternators. After having been given a reference to this site and the
> Aeroelectric Connection by a friend, I have spent the last few days
> scanning the list and reading the book. This has clarified a number
> of things, but I still have a few questions which, based on what I
> have seen here so far, I am sure someone will be able to answer.
>
> I have seen a number of references to problems with load dumping if
> the alternator is disconnected from the battery. Is this a problem
> with PM alternators or only wound field ones?
>
> The simple Jabiru schematic in Figure Z-20 would appear to use the
> same regulator looking at the pin-outs and wire colours, and would
> seem to meet our requirement. Is the electrolytic capacitor at the
> output of the regulatorfor noise filtering, or is it related to the
> load dumping problem?
>
> I have also seen a couple of schematics on builders web sites with
> slightly different approaches. One used the alternator switch to both
> disconnect the regulator sense line from the main bus and control a
> relay connecting the regulator output line to the main bus, but no
> capacitor. The other had a relay only in the regulator output line.
> The sense line was left connected to the main bus, and would therefore
> have still been at +12V ( at least until the battery discharged) if
> the alternator switch was opened. Once again, no capacitor. What are
> the advantages or problems associated with these approaches?
>
> Regards
>
> Noel Karppinen
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: | Transponder antenna in rag/tube aircraft |
Thanks again Bob !
Peter H
-----Original Message-----
From: owner-aeroelectric-list-server@matronics.com
[mailto:owner-aeroelectric-list-server@matronics.com] On Behalf Of Robert L.
Nuckolls, III
Sent: Tuesday, 9 October 2007 3:33 AM
Subject: RE: AeroElectric-List: Transponder antenna in rag/tube aircraft
<nuckolls.bob@cox.net>
At 09:40 AM 10/8/2007 +1000, you wrote:
><peterjfharris@bigpond.com>
>
>Related question please.
>In my glass hull I fitted the transponder antenna about 4" inside the
>perimeter of the circular VHF ground plane ie it shares this ground plane.
>Is that a No-No?
>Thanks
>Peter H
it will probably be fine.
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: Jabiru Alternator Wiring |
Peter
I'm using a 40 amp rated automotive relay with push on connections.
About a 1" cube. Think they are sometimes called a VF4 by Tyco. $3. or
maybe $4. from places like digi-key.
Ken
Peter Harris wrote:
>
>Ken,
>Can you advise details of the AC relay and its connections? (Sometimes a 20A
>fuse is used there)
>Thanks
>Peter H
>
>-----Original Message-----
>From: owner-aeroelectric-list-server@matronics.com
>[mailto:owner-aeroelectric-list-server@matronics.com] On Behalf Of Ken
>Sent: Monday, 8 October 2007 11:44 PM
>To: aeroelectric-list@matronics.com
>Subject: Re: AeroElectric-List: Jabiru Alternator Wiring
>
>
>Hello Noel
>
>I believe there are no load dump issues with PM alternators. The
>capacitor is for noise I think mostly for running without a battery in
>the circuit. My architecture never does that and since the capacitor
>didn't make any difference for me I eliminated it. I have a relay
> between the alternator and the regulator for control and overvolt
>cutoff. It does not take a robust contactor there as it is AC current
>and that relay also lets me kill power to a misbehaving regulator. The
>B+ output of the regulator has a CB (a fuse would be fine) to protect
>against excess battery current going into a misbehaving regulator. My
>control switch does control the relay and provide power to the
>regulator. Some regulators draw a bit of current when not in use but
>regardless I want to shut off that wire on a misbehaving regulator. If
>you've detected a theme here - yes the regulator tends to be the most
>failure prone component so mine is on the cool side of the firewall
>where it gets warm to the touch but not hot.
>Ken
>
>
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: | GMA 340 Audio Panel and Garmin 496 |
Listers:
Here is another issue that I've not been able to solve, maybe someone has
already done this and/or give me some advice. I have a Garmin GMA 340 Audio
Panel, pre-wired by Stark Aviation. I also have a Garmin 496. I would like
to connect the alerts/alarms feature of my 496 to the audio panel. My
understanding is these alarms come over the "music out" from the 496 but
maybe this isn't the only output. My audio panel has Music inputs, which I
have planned to connect to a 1/8" jack for use with an IPOD. Only one
music source can be used by the Pilot (me) so if I used 1/8 inch music cord
(1/8 inch plugs on either end). I could either plug in my IPOD or the 496,
but not both at the same time.
I am using a Garmin Power/Data cable to wire ship power to the 496. This
cord has the following wires with labels as:
Red DC Input
Blue Port 1 out
White Alarm
Orange voice (-)
Violet port 2 out
Black Grd
Yellow Port 1 in
Brown Voice +
Green port 2 in.
I am presently useing the Red DC Input, Black Grd, and Blue Port 1 out
(split to 3 leads for GPS steering, commuication to my fuel totalizer and
Sl-30 for airport freq data exchanging).
My wire harness for the Audio Panel also has two lines emanating marked
Unswitched Audio Hi and one marked Unswitched Audio Lo as wired by Stark
Aviation. I'm not sure how these are to be used.
So here's the question, if you've followed me so far, can any of these
Power/Date wires be connect to my Audio Panel to enable me to hear just the
alarms while listening to my IPOD?
Later, I may hook up the satellite radio to the music inputs and will need a
switch to select between IPOD and Satellite Radio.
Can someone point me in the right direction (Mr. Stein?), other than to
change my whole equipment package?
Marty in Brentwood TN
RV-6A taking way too long!
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: | Got a new toy . . . |
I've been the pleased and successful user of Tektronix's
low cost but very capable TDS series 'scopes for a number of
years. My TDS210 has flown thousands of miles connected to a
battery/inverter pack on the floor. The inverter also powered
a bubble-jet printer that takes screen dumps from the scope
and puts them on paper. Later scanning allowed me to share
'scope traces with folks in a variety of venues.
http://www.aeroelectric.com/Pictures/Curves/4_bounce500Knocap1.gif
http://www.aeroelectric.com/Pictures/Curves/95_GMC_Safari_1.gif
I just retired my TDS210 by selling it to a customer as a
startup 'scope and purchased a new TDS2012 for the same
money that the TDS210 cost me 5 or 6 years ago. The 2012
is 100Mhz vs. 60 and a color screen. Instead of a printer
output port, it features a USB thumb drive socket on the
front that dumps the screen to a .jpg image . . .
http://www.aeroelectric.com/Pictures/Curves/TDS2012_Sample.jpg
at the same time, it writes the data to a .cvs file that
can be imported by a variety of applications including
Excel. Once in tabular form, one can do a variety of
additional analyses on the numbers or plot it like . . .
http://www.aeroelectric.com/Pictures/Curves/TDS2012_Sample.pdf
I love this business. As long as it remains a free
market, we'll be able to look to more capability for
less $time$ tomorrow. Thought some of you 'scope drivers
out there would like to know about this product:
http://www.tek.com/site/ps/3G-19558/pdfs/3GW_19558.pdf
Lots of bang for the buck!
Bob . . .
----------------------------------------
( "Problems are the price of progress. )
( Don't bring me anything but trouble. )
( Good news weakens me." )
( -Charles F. Kettering- )
----------------------------------------
Message 15
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: | Jabiru Alternator Wiring |
Thanks ken
What are the connections?
Peter
-----Original Message-----
From: owner-aeroelectric-list-server@matronics.com
[mailto:owner-aeroelectric-list-server@matronics.com] On Behalf Of Ken
Sent: Tuesday, 9 October 2007 9:57 AM
Subject: Re: AeroElectric-List: Jabiru Alternator Wiring
Peter
I'm using a 40 amp rated automotive relay with push on connections.
About a 1" cube. Think they are sometimes called a VF4 by Tyco. $3. or
maybe $4. from places like digi-key.
Ken
Peter Harris wrote:
<peterjfharris@bigpond.com>
>
>Ken,
>Can you advise details of the AC relay and its connections? (Sometimes a
20A
>fuse is used there)
>Thanks
>Peter H
>
>-----Original Message-----
>From: owner-aeroelectric-list-server@matronics.com
>[mailto:owner-aeroelectric-list-server@matronics.com] On Behalf Of Ken
>Sent: Monday, 8 October 2007 11:44 PM
>To: aeroelectric-list@matronics.com
>Subject: Re: AeroElectric-List: Jabiru Alternator Wiring
>
>
>Hello Noel
>
>I believe there are no load dump issues with PM alternators. The
>capacitor is for noise I think mostly for running without a battery in
>the circuit. My architecture never does that and since the capacitor
>didn't make any difference for me I eliminated it. I have a relay
> between the alternator and the regulator for control and overvolt
>cutoff. It does not take a robust contactor there as it is AC current
>and that relay also lets me kill power to a misbehaving regulator. The
>B+ output of the regulator has a CB (a fuse would be fine) to protect
>against excess battery current going into a misbehaving regulator. My
>control switch does control the relay and provide power to the
>regulator. Some regulators draw a bit of current when not in use but
>regardless I want to shut off that wire on a misbehaving regulator. If
>you've detected a theme here - yes the regulator tends to be the most
>failure prone component so mine is on the cool side of the firewall
>where it gets warm to the touch but not hot.
>Ken
>
>
Message 16
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 |
|
At 08:34 PM 10/8/2007 -0500, you wrote:
>Hey Bob -
>
>You mentioned a possible opportunity to visit Brad a few weeks ago.
>Were you able to sit down with them over coffee and traces?
>Anything to share?
>
>neal
I'm going down tomorrow. I'll have to make
it a quick, one-day trip. But there's a couple
of audio books I've been wanting to 'read'
so it will be a pleasant diversion.
Bob . . .
----------------------------------------
( "Problems are the price of progress. )
( Don't bring me anything but trouble. )
( Good news weakens me." )
( -Charles F. Kettering- )
----------------------------------------
Message 17
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: | GMA 340 Audio Panel and Garmin 496 |
Marty,
The music output from the 496 should go to the music input ( No. 1 or No. 2,
your choice) of the GMA340. All that comes from the music out is the XM
stuff. By running it into the music input, it will mute when you receive
other transmissions.
The "voice" + and - from the GPS power cord go to the unswitched audio on
the audio panel. That will get you all the voice outputs from the GPS for
warnings, etc.
On my installation, I toggled Music 1 input between XM and the 1/8 jack you
mentioned with a simple switch.
Any questions feel free to call.
Dave Saylor
AirCrafters LLC
140 Aviation Way
Watsonville, CA
831-722-9141
831-750-0284 CL
www.AirCraftersLLC.com
-----Original Message-----
From: owner-aeroelectric-list-server@matronics.com
[mailto:owner-aeroelectric-list-server@matronics.com] On Behalf Of Emrath
Sent: Monday, October 08, 2007 5:38 PM
Subject: AeroElectric-List: GMA 340 Audio Panel and Garmin 496
Listers:
Here is another issue that I've not been able to solve, maybe someone has
already done this and/or give me some advice. I have a Garmin GMA 340 Audio
Panel, pre-wired by Stark Aviation. I also have a Garmin 496. I would like
to connect the alerts/alarms feature of my 496 to the audio panel. My
understanding is these alarms come over the "music out" from the 496 but
maybe this isn't the only output. My audio panel has Music inputs, which I
have planned to connect to a 1/8" jack for use with an IPOD. Only one
music source can be used by the Pilot (me) so if I used 1/8 inch music cord
(1/8 inch plugs on either end). I could either plug in my IPOD or the 496,
but not both at the same time.
I am using a Garmin Power/Data cable to wire ship power to the 496. This
cord has the following wires with labels as:
Red DC Input
Blue Port 1 out
White Alarm
Orange voice (-)
Violet port 2 out
Black Grd
Yellow Port 1 in
Brown Voice +
Green port 2 in.
I am presently useing the Red DC Input, Black Grd, and Blue Port 1 out
(split to 3 leads for GPS steering, commuication to my fuel totalizer and
Sl-30 for airport freq data exchanging).
My wire harness for the Audio Panel also has two lines emanating marked
Unswitched Audio Hi and one marked Unswitched Audio Lo as wired by Stark
Aviation. I'm not sure how these are to be used.
So here's the question, if you've followed me so far, can any of these
Power/Date wires be connect to my Audio Panel to enable me to hear just the
alarms while listening to my IPOD?
Later, I may hook up the satellite radio to the music inputs and will need a
switch to select between IPOD and Satellite Radio.
Can someone point me in the right direction (Mr. Stein?), other than to
change my whole equipment package?
Marty in Brentwood TN
RV-6A taking way too long!
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! --
|