---------------------------------------------------------- AeroElectric-List Digest Archive --- Total Messages Posted Mon 10/08/07: 17 ---------------------------------------------------------- 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 _____________________________________ Time: 02:02:22 AM PST US From: "RV_10" Subject: RE: AeroElectric-List: "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 _____________________________________ Time: 02:56:17 AM PST US From: luckymacy@comcast.net (lucky) Subject: RE: AeroElectric-List: "scratchy" transmission Thanks bud, that's exactly the kind of "special insight" I was looking for! lucky -------------- Original message -------------- From: "RV_10" 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
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
To: aeroelectric-list@matronics.com
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
________________________________ Message 3 _____________________________________ Time: 05:38:24 AM PST US From: "Noel Karppinen" Subject: AeroElectric-List: 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 _____________________________________ Time: 06:06:56 AM PST US From: MauleDriver Subject: Re: AeroElectric-List: Re: Wire 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 _____________________________________ Time: 06:45:04 AM PST US From: Ken 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 6 _____________________________________ Time: 06:55:59 AM PST US From: "John McKiernan" Subject: Re: AeroElectric-List: Music Inputs Tip = Right Ring = Left Barrel = Common (Low) Rocky ________________________________ Message 7 _____________________________________ Time: 09:32:05 AM PST US From: "Robert L. Nuckolls, III" Subject: Re: AeroElectric-List: Re: Wire 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 _____________________________________ Time: 09:32:06 AM PST US From: "Robert L. Nuckolls, III" Subject: Re: AeroElectric-List: Re: Wire 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 _____________________________________ Time: 09:32:35 AM PST US From: "Robert L. Nuckolls, III" Subject: RE: AeroElectric-List: Transponder antenna in rag/tube aircraft At 09:40 AM 10/8/2007 +1000, you wrote: > > >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 ____________________________________ Time: 02:22:10 PM PST US From: "Peter Harris" Subject: RE: AeroElectric-List: 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 ____________________________________ Time: 02:23:24 PM PST US From: "Peter Harris" Subject: RE: AeroElectric-List: 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 At 09:40 AM 10/8/2007 +1000, you wrote: > > >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 ____________________________________ Time: 04:59:31 PM PST US From: Ken 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: > >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 ____________________________________ Time: 05:39:11 PM PST US From: "Emrath" 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! ________________________________ Message 14 ____________________________________ Time: 06:18:48 PM PST US From: "Robert L. Nuckolls, III" Subject: AeroElectric-List: 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 ____________________________________ Time: 08:13:02 PM PST US From: "Peter Harris" Subject: RE: AeroElectric-List: 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: > >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 ____________________________________ Time: 08:21:12 PM PST US From: "Robert L. Nuckolls, III" Subject: AeroElectric-List: Re: EMag 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 ____________________________________ Time: 11:05:31 PM PST US From: "Dave Saylor" Subject: RE: AeroElectric-List: 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 ------------------------------------------------------------------------------------- Post A New Message aeroelectric-list@matronics.com UN/SUBSCRIBE http://www.matronics.com/subscription List FAQ http://www.matronics.com/FAQ/AeroElectric-List.htm Web Forum Interface To Lists http://forums.matronics.com Matronics List Wiki http://wiki.matronics.com Full Archive Search Engine http://www.matronics.com/search 7-Day List Browse http://www.matronics.com/browse/aeroelectric-list Browse Digests http://www.matronics.com/digest/aeroelectric-list Browse Other Lists http://www.matronics.com/browse Live Online Chat! http://www.matronics.com/chat Archive Downloading http://www.matronics.com/archives Photo Share http://www.matronics.com/photoshare Other Email Lists http://www.matronics.com/emaillists Contributions http://www.matronics.com/contribution ------------------------------------------------------------------------------------- These Email List Services are sponsored solely by Matronics and through the generous Contributions of its members.