---------------------------------------------------------- AeroElectric-List Digest Archive --- Total Messages Posted Wed 11/03/04: 23 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 04:22 AM - Re: Niagara/Denso Alternator Overvoltage protection (LarryRobertHelming) 2. 04:45 AM - Re: Garmin GPS antenna (DWENSING@aol.com) 3. 05:01 AM - Re: Re: Garmin GPS antenna (Harley) 4. 05:06 AM - Re: Driving electronic rpm meter from both magnetos (Trampas) 5. 05:34 AM - Re: Grommet/bushing like thingy whatsit (Eric M. Jones) 6. 07:16 AM - Re: Niagara/Denso Alternator Overvoltage protection (Werner Schneider) 7. 08:05 AM - Re: Re: Garmin GPS antenna (Gary Craze) 8. 08:37 AM - Re: Niagara/Denso Alternator Overvoltage (Robert L. Nuckolls, III) 9. 08:43 AM - Re: Niagara/Denso Alternator Overvoltage (Robert L. Nuckolls, III) 10. 08:44 AM - Re: Niagara/Denso Alternator Overvoltage (Robert L. Nuckolls, III) 11. 08:55 AM - Re: Crimping tool (ALWAYSPDG@aol.com) 12. 09:49 AM - Hangar Radios (Fiveonepw@aol.com) 13. 10:01 AM - Re: Niagara/Denso Alternator Overvoltage protection (Werner Schneider) 14. 11:18 AM - Re: Driving electronic rpm meter from both (Charlie Kuss) 15. 12:59 PM - Re: Hangar Radios (SportAV8R@aol.com) 16. 01:34 PM - Re: Niagara/Denso Alternator Overvoltage (Robert L. Nuckolls, III) 17. 01:58 PM - Re: Hangar Radios (Matt Prather) 18. 02:01 PM - Re: Hangar Radios (Fiveonepw@aol.com) 19. 03:42 PM - Grounding (Kingsley Hurst) 20. 04:16 PM - Re: Re: EMags (David Shani) 21. 05:04 PM - Re: Re: EMags (Larry Bowen) 22. 08:33 PM - Re: Hangar Radios (Ken) 23. 09:54 PM - Re: Hangar Radios (Tony Babb) ________________________________ Message 1 _____________________________________ Time: 04:22:52 AM PST US From: "LarryRobertHelming" Subject: Re: AeroElectric-List: Niagara/Denso Alternator Overvoltage protection --> AeroElectric-List message posted by: "LarryRobertHelming" Just wondering, with the Nuckolls version of ov, what indication do you get if the cute little warning light burns out? Is that part of the preflight/startup procedures to test to ensure it is working at least at the start of a flight? Wouldn't an LED be a better choice for the light? Indiana Larry, RV7 TipUp "SunSeeker" The sincerest satisfactions in life come in doing and not dodging duty; in meeting and solving problems, in facing facts; in flying a virgin plane never flown before. - Richard L. Evans & Larry R Helming ----- Original Message ----- From: "Denis Walsh" Subject: Re: AeroElectric-List: Niagara/Denso Alternator Overvoltage protection > --> AeroElectric-List message posted by: Denis Walsh > > I have been operating the Niagra Denso 40 for a couple years, probably > 350 hours or so. I concur it is a great machine.I can't speak for the > zeff ov thingy. I have the Nuckolls version, which probably does have > a very rapid response, and uses a huge contactor, which also responds > fast with a snap. I have most certainly checked the capability of the > Denso to react to instant unload and it has not fried. This has been > done several times both inadvertantly and advertantly before I knew it > was a risk. > > One additional thing I would highly recommend is the Nuckolls low > voltage warning lite. It is cheap, cute, bright, and will remind you > to turn off the batt switch after flight by flashing in your face. If > it flashes in flight it will remind you to look for a nearby landing > site, where they will have an auto shop which can fix or replace your > denso... > > Denis > On Nov 2, 2004, at 12:36 PM, Christopher Stone wrote: > > > --> AeroElectric-List message posted by: Christopher Stone > > > > > > Good Morning all... > > > > We (two RV-8 builders) are at the "add electrical system" point in the > > construction process. From front to back the first item in question > > is the alternator. Having followed this list for some time I have > > concluded the Denso 40 amp alternator is the item that fits our > > output/weight/simplicity criteria. > > > > A search of the archives was less then productive. > > > > The question(s): > > > > Has anyone installed the Niagara alternater with over volatge > > protection package. > > > > The alternator appears to be a standard Denso with internal > > regulation. The overvoltage protection is by Zeftronics. > > > > http://www.niagaraairparts.com/ASP101-PIT%201.pdf > > > > The overvoltage circuit appears to function by sensing alternator > > output voltage. When the voltage exceeds the preset threshold it then > > opens a contactor in series with the alternator output. > > > > This looks like it will work... A couple of questions though. > > > > What is the time constant of the circuit? Is it fast enough to catch > > an overvoltage event before it can damage black boxes? > > > > Since it instantly unloads the alternator, if the alternator wasn't > > already fried which caused the overvoltage event, wouldn't it be fried > > by the sudden loss of load? > > > > Thanks in advance... > > > > This list has been a gold mine of information! > > > > Chris Stone > > > > > > ________________________________ Message 2 _____________________________________ Time: 04:45:38 AM PST US From: DWENSING@aol.com Subject: AeroElectric-List: Re: Garmin GPS antenna --> AeroElectric-List message posted by: DWENSING@aol.com Bob and GPS savvy lister, I have a remote mount Garmin GPS antenna, model GA 26C, that came with my 295 about 5 years ago. Have never tried using it until now. It does not work! Garmin says they do not service antennas and my option is to buy a new one for $100. Is there any way to check out a GPS antenna (like resistance value) before I try opening the case and examining for broken wire, etc.? Dale Ensing ________________________________ Message 3 _____________________________________ Time: 05:01:45 AM PST US From: Harley Subject: Re: AeroElectric-List: Re: Garmin GPS antenna --> AeroElectric-List message posted by: Harley Morning, Dale... First, it's not just an antenna...it's also an amplifier of sorts. But, if it really is faulty, it may be a better choice to get one of these units instead of Garmin...I think you'll find they are basically the same thing. http://www.gpsgeek.com/page3.html Harley Dixon DWENSING@aol.com wrote: >--> AeroElectric-List message posted by: DWENSING@aol.com > >Bob and GPS savvy lister, > >I have a remote mount Garmin GPS antenna, model GA 26C, that came with my 295 >about 5 years ago. Have never tried using it until now. It does not work! >Garmin says they do not service antennas and my option is to buy a new one for >$100. >Is there any way to check out a GPS antenna (like resistance value) before I >try opening the case and examining for broken wire, etc.? > >Dale Ensing > > > > ________________________________ Message 4 _____________________________________ Time: 05:06:23 AM PST US From: "Trampas" Subject: RE: AeroElectric-List: Driving electronic rpm meter from both magnetos --> AeroElectric-List message posted by: "Trampas" Brian, I remember seeing the capacitor coupling system some where: www.rkymtn.com/minstall.pdf. So basically it does work with the Rocky Mountain instrument. The reason it works is the low frequency component of the p-leads signals are relatively in phase, other wise your timing is wrong on one or both magnetos. Regards, Trampas Stern www.sterntech.com -----Original Message----- From: owner-aeroelectric-list-server@matronics.com [mailto:owner-aeroelectric-list-server@matronics.com] On Behalf Of Brian Lloyd Subject: Re: AeroElectric-List: Driving electronic rpm meter from both magnetos --> AeroElectric-List message posted by: Brian Lloyd On Nov 2, 2004, at 10:11 PM, Trampas wrote: > --> AeroElectric-List message posted by: "Trampas" > > I think we have beat the horse pretty well. So it basically boils down > to > "it depends on the tachometer." Almost. I don't think you can combine the signals from the two p-leads without significant preprocessing. And once you do that the rest is cake. Brian Lloyd 6501 Red Hook Plaza brianl@lloyd.com Suite 201 +1.340.998.9447 St. Thomas, VI 00802 I fly because it releases my mind from the tyranny of petty things . . . Antoine de Saint-Exupry ________________________________ Message 5 _____________________________________ Time: 05:34:36 AM PST US From: "Eric M. Jones" Subject: AeroElectric-List: Re: Grommet/bushing like thingy whatsit --> AeroElectric-List message posted by: "Eric M. Jones" On my website I sell Panduit's Lightening Hole Wire Mounts. These take a lot of hassle out of stringing wires through rib and bulkhead lightening holes. Regards, Eric M. Jones www.PerihelionDesign.com 113 Brentwood Drive Southbridge MA 01550-2705 Phone (508) 764-2072 Email: emjones@charter.net Teamwork: " A lot of people doing exactly what I say." (Marketing exec., Citrix Corp.) ________________________________ Message 6 _____________________________________ Time: 07:16:49 AM PST US From: "Werner Schneider" Subject: Re: AeroElectric-List: Niagara/Denso Alternator Overvoltage protection --> AeroElectric-List message posted by: "Werner Schneider" When you switch on the OV/Low Voltage light will be on(I've replaced it with a LED) So that is your test. Werner ----- Original Message ----- From: "LarryRobertHelming" Subject: Re: AeroElectric-List: Niagara/Denso Alternator Overvoltage protection > --> AeroElectric-List message posted by: "LarryRobertHelming" > > Just wondering, with the Nuckolls version of ov, what indication do you get > if the cute little warning light burns out? Is that part of the > preflight/startup procedures to test to ensure it is working at least at the > start of a flight? Wouldn't an LED be a better choice for the light? > > Indiana Larry, RV7 TipUp "SunSeeker" > > The sincerest satisfactions in life come in doing and not dodging duty; > in meeting and solving problems, in facing facts; > in flying a virgin plane never flown before. > - Richard L. Evans & Larry R Helming > > ----- Original Message ----- > From: "Denis Walsh" > To: > Subject: Re: AeroElectric-List: Niagara/Denso Alternator Overvoltage > protection > > > > --> AeroElectric-List message posted by: Denis Walsh > > > > > I have been operating the Niagra Denso 40 for a couple years, probably > > 350 hours or so. I concur it is a great machine.I can't speak for the > > zeff ov thingy. I have the Nuckolls version, which probably does have > > a very rapid response, and uses a huge contactor, which also responds > > fast with a snap. I have most certainly checked the capability of the > > Denso to react to instant unload and it has not fried. This has been > > done several times both inadvertantly and advertantly before I knew it > > was a risk. > > > > One additional thing I would highly recommend is the Nuckolls low > > voltage warning lite. It is cheap, cute, bright, and will remind you > > to turn off the batt switch after flight by flashing in your face. If > > it flashes in flight it will remind you to look for a nearby landing > > site, where they will have an auto shop which can fix or replace your > > denso... > > > > Denis > > On Nov 2, 2004, at 12:36 PM, Christopher Stone wrote: > > > > > --> AeroElectric-List message posted by: Christopher Stone > > > > > > > > > Good Morning all... > > > > > > We (two RV-8 builders) are at the "add electrical system" point in the > > > construction process. From front to back the first item in question > > > is the alternator. Having followed this list for some time I have > > > concluded the Denso 40 amp alternator is the item that fits our > > > output/weight/simplicity criteria. > > > > > > A search of the archives was less then productive. > > > > > > The question(s): > > > > > > Has anyone installed the Niagara alternater with over volatge > > > protection package. > > > > > > The alternator appears to be a standard Denso with internal > > > regulation. The overvoltage protection is by Zeftronics. > > > > > > http://www.niagaraairparts.com/ASP101-PIT%201.pdf > > > > > > The overvoltage circuit appears to function by sensing alternator > > > output voltage. When the voltage exceeds the preset threshold it then > > > opens a contactor in series with the alternator output. > > > > > > This looks like it will work... A couple of questions though. > > > > > > What is the time constant of the circuit? Is it fast enough to catch > > > an overvoltage event before it can damage black boxes? > > > > > > Since it instantly unloads the alternator, if the alternator wasn't > > > already fried which caused the overvoltage event, wouldn't it be fried > > > by the sudden loss of load? > > > > > > Thanks in advance... > > > > > > This list has been a gold mine of information! > > > > > > Chris Stone > > > > > > > > > > > > ________________________________ Message 7 _____________________________________ Time: 08:05:34 AM PST US From: "Gary Craze" Subject: RE: AeroElectric-List: Re: Garmin GPS antenna --> AeroElectric-List message posted by: "Gary Craze" I'll second that. The external antenna that came with my 295 stank. There are a lot of good, external amplified antennas out there that work much better. I got one off eBay about a year ago for $20. Here's an example... http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&category=34289&item=572928 7376&rd=1&ssPageName=WDVW It performs much, much better than the external antenna that came with my 295. Regards, Gary N801GC (reserved) -----Original Message----- From: owner-aeroelectric-list-server@matronics.com [mailto:owner-aeroelectric-list-server@matronics.com] On Behalf Of Harley Subject: Re: AeroElectric-List: Re: Garmin GPS antenna --> AeroElectric-List message posted by: Harley --> Morning, Dale... First, it's not just an antenna...it's also an amplifier of sorts. But, if it really is faulty, it may be a better choice to get one of these units instead of Garmin...I think you'll find they are basically the same thing. http://www.gpsgeek.com/page3.html Harley Dixon DWENSING@aol.com wrote: >--> AeroElectric-List message posted by: DWENSING@aol.com > >Bob and GPS savvy lister, > >I have a remote mount Garmin GPS antenna, model GA 26C, that came with >my 295 >about 5 years ago. Have never tried using it until now. It does not work! >Garmin says they do not service antennas and my option is to buy a new one for >$100. >Is there any way to check out a GPS antenna (like resistance value) before I >try opening the case and examining for broken wire, etc.? > >Dale Ensing > > > > ________________________________ Message 8 _____________________________________ Time: 08:37:15 AM PST US From: "Robert L. Nuckolls, III" protection Subject: Re: AeroElectric-List: Niagara/Denso Alternator Overvoltage protection --> AeroElectric-List message posted by: "Robert L. Nuckolls, III" protection At 11:36 AM 11/2/2004 -0800, you wrote: >--> AeroElectric-List message posted by: Christopher Stone > > >Good Morning all... > >We (two RV-8 builders) are at the "add electrical system" point in the >construction process. From front to back the first item in question is >the alternator. Having followed this list for some time I have concluded >the Denso 40 amp alternator is the item that fits our >output/weight/simplicity criteria. > >A search of the archives was less then productive. > >The question(s): > >Has anyone installed the Niagara alternater with over volatge protection >package. > >The alternator appears to be a standard Denso with internal >regulation. The overvoltage protection is by Zeftronics. > >http://www.niagaraairparts.com/ASP101-PIT%201.pdf > >The overvoltage circuit appears to function by sensing alternator output >voltage. When the voltage exceeds the preset threshold it then opens a >contactor in series with the alternator output. We published techniques for adding OV protection to alternators having built in regulators a number of years ago. See: http://www.aeroelectric.com/articles/bleadov.pdf http://www.aeroelectric.com/articles/crowbar.pdf >This looks like it will work... A couple of questions though. > >What is the time constant of the circuit? Is it fast enough to catch an >overvoltage event before it can damage black boxes? Depends on the ov sensor circuit. First, let's define "fast enough". See: http://www.aeroelectric.com/Pictures/MSTD704_28V_OV.jpg This is an excerpt from Mil-STD-704 on aircraft power quality where we're advised that one should EXPECT bus voltage conditions that lie between the upper and lower curves as part of NORMAL operation. This graph is for 28v system, cut the voltages in half for a 14v system. Many OV sensor systems are TOO FAST in that they nuisance trip when presented with conditions that live between the upper and lower curves. OV conditions are a function of generator/regulator issues and have a little different nature than transient conditions originating from other sources. Consider also: http://www.aeroelectric.com/Pictures/MSTD704_28V_Trans.jpg This graph speaks to transient conditions one should expect as a normal operating condition on the bus. Again, cut the voltage values on the left in half. And finally take a peek at: http://www.aeroelectric.com/Pictures/MSTD704_28V_Noise.jpg This graph speaks to noise from the power generation system and/or other appliances that take power from the bus. The peek noise in the middle is 1 Vrms (3v pk-pk) on a 28v system or roughly 10% pk-pk noise for a system. This means that a 14v system can be expected to have as much as 1.5 volts peak-peak trash in the range from 1000 to 5000 Hz with the amplitude falling off either side as depicted. Any device, including OV sensors, need to be designed with these conditions in mind. For OV sensors, one wants to respond as quickly as practical for any real OV condition but to adequately ignore the things that normally go "bump" on the bus. >Since it instantly unloads the alternator, if the alternator wasn't >already fried which caused the overvoltage event, wouldn't it be fried by >the sudden loss of load? Maybe. An issue surfaced a few months ago when Vans began recommending AGAINST adding ov protection as depicted in our drawings. Seems a few builders had managed to zing the voltage regulators in Vans-supplied alternators by turning them on/off while loaded. The drawings have been published on the AeroElectric website for at least 6 years and we're not hearing about alternators dropping like flies. There are studies and plans for investigating the phenomenon in more detail but they're back-burner projects. My sense at the moment is that rebuilt alternators with aftermarket regulators installed may be at-risk for load-dump damage. I'd like to believe that Nipon Denso recognizes the risk of load-dump damage and designs their factory stock regulators to stand off the transient. It's a sure bet that ND has their own, in-house equivalents of the Mil-STD-704 data I cited above. Bottom line is that your $risk$ to the system is far greater for NOT having ov protection than for leaving it off in favor of coddling a sub-standard alternator. The wiring diagrams for adding external ov protection on internally regulated alternators will be modified to add the appropriate transient suppressor so that the technique will function worry-free for even the most wimpish of after-market regulators. The short answer to your original question is: Don't know a thing about design philosophy behind the ov sensor cited in the Niagara Airparts installation but it's a reasonable bet that the part was developed originally for a certified system by folks who had some idea of what the requirements were. Bob . . . --- ________________________________ Message 9 _____________________________________ Time: 08:43:03 AM PST US From: "Robert L. Nuckolls, III" protection Subject: Re: AeroElectric-List: Niagara/Denso Alternator Overvoltage protection --> AeroElectric-List message posted by: "Robert L. Nuckolls, III" protection At 06:22 AM 11/3/2004 -0600, you wrote: >--> AeroElectric-List message posted by: "LarryRobertHelming" > > >Just wondering, with the Nuckolls version of ov, what indication do you get >if the cute little warning light burns out? Is that part of the >preflight/startup procedures to test to ensure it is working at least at the >start of a flight? Wouldn't an LED be a better choice for the light? > >Indiana Larry, RV7 TipUp "SunSeeker" The system we offer as both assembled and do-it-yourself projects is described at: http://www.aeroelectric.com/Pictures/MSTD704_28V_Noise.jpg http://www.aeroelectric.com/articles/lvwarn/9021-620.pdf http://www.aeroelectric.com/Catalog/AEC/9005/9005.html http://www.aeroelectric.com/Catalog/AEC/9005/9005-701B.pdf When purchased from us, the device IS supplied with an LED fixture. Further, it's not an OVER voltage sensor but a LOW voltage sensor. It begins to flash every time you power up the bus before starting the engine and therefore meets the desire of regulators for certified systems for adequate pre-flight testing. Of course, one could turn an alternator OFF at any time to see if the low voltage light comes on . . . Bob . . . --- ________________________________ Message 10 ____________________________________ Time: 08:44:00 AM PST US From: "Robert L. Nuckolls, III" protection Subject: Re: AeroElectric-List: Niagara/Denso Alternator Overvoltage protection --> AeroElectric-List message posted by: "Robert L. Nuckolls, III" protection At 04:15 PM 11/3/2004 +0100, you wrote: >--> AeroElectric-List message posted by: "Werner Schneider" > >When you switch on the OV/Low Voltage light will be on(I've replaced it with >a LED) >So that is your test. > >Werner What did you "replace"? If you bought it from me, it came with an LED. Bob . . . --- ________________________________ Message 11 ____________________________________ Time: 08:55:05 AM PST US From: ALWAYSPDG@aol.com Subject: Re: AeroElectric-List: Crimping tool --> AeroElectric-List message posted by: ALWAYSPDG@aol.com Bob, I have a question for you. I am looking for a wire stripper than can strip wire around 6 or even 4 gauge wire. Do you know where to look to purchase a stripper like this? Thanks, Mike ________________________________ Message 12 ____________________________________ Time: 09:49:25 AM PST US From: Fiveonepw@aol.com Subject: AeroElectric-List: Hangar Radios --> AeroElectric-List message posted by: Fiveonepw@aol.com Folks, this is extremely obliquely building-oriented, but I know the answer is here so here goes... My new hangar faces away from almost all AM & FM stations I like to listen to on my cheap ghetto-blaster. I can get the FM by poking the antenna out the door, but the AM is, as described here often, very much line-of-sight. I "think" the AM antenna is not connected to the external telescoping antenna, as it makes no difference in being in/out/extended/pointed anywhere in particular. Any suggestions short of getting a different hangar? GOTTA have my AM! Thanks and do not archive Mark ________________________________ Message 13 ____________________________________ Time: 10:01:01 AM PST US From: "Werner Schneider" Subject: Re: AeroElectric-List: Niagara/Denso Alternator Overvoltage protection --> AeroElectric-List message posted by: "Werner Schneider" Sorry Bob, I was referring to the Voltage Regulator from B&C which has an inbuilt OV protection and came with the light bulb, I replaced it acceding to your sketch with a LED together with the two resistors. Should read more careful next time Werner ----- Original Message ----- From: "Robert L. Nuckolls, III protection" Subject: Re: AeroElectric-List: Niagara/Denso Alternator Overvoltage protection > --> AeroElectric-List message posted by: "Robert L. Nuckolls, III" protection > > At 04:15 PM 11/3/2004 +0100, you wrote: > > >--> AeroElectric-List message posted by: "Werner Schneider" > > > >When you switch on the OV/Low Voltage light will be on(I've replaced it with > >a LED) > >So that is your test. > > > >Werner > > What did you "replace"? If you bought it from me, it came > with an LED. > > Bob . . . > > > --- > > ________________________________ Message 14 ____________________________________ Time: 11:18:40 AM PST US From: Charlie Kuss magnetos Subject: Re: AeroElectric-List: Driving electronic rpm meter from both magnetos --> AeroElectric-List message posted by: Charlie Kuss magnetos Instead of all these electronic gyrations you are going through, why not do this instead? Forget using the mags as a signal source. Mount a hall effect sensor on the rear of the flywheel. Use that as the tach's signal. With this setup, you can have an combination of mags, electronic ignitions. etc. The ignition design won't matter one wit! I know my RMI MicroMonitor offers this option to drive the tach. Charlie Kuss >--> AeroElectric-List message posted by: "Robert L. Nuckolls, III" > magnetos > >At 12:03 PM 11/1/2004 -0500, you wrote: > > >--> AeroElectric-List message posted by: Charlie Kuss > > magnetos > > > > > > >snipped > > > > I'd use resistors but only read one mag at a time and use the > > > > resistors to prevent fault on tachometer wiring from taking > > > > a magneto down. > > > > > > > > > > > > > > > > > > > >>I wonder if you have a recommended diagram for driving an > electronic rpm > > > >>meter from both magnetos? > > > >> > > > >> > > > > > > > > Sure. See > > > > > > > > http://www.aeroelectric.com/PPS/Engine/Mags_with_Electronic_Tach.pdf > > > > > > > > > > > > Bob . . . > > > >Bob > > I just tried the link, but there was nothing there > >Charlie Kuss > > You missed the second link for revision A: > >http://www.aeroelectric.com/PPS/Engine/Mags_with_Electronic_Tach_A.pdf > > > Bob . . . > > >--- > > ________________________________ Message 15 ____________________________________ Time: 12:59:53 PM PST US From: SportAV8R@aol.com Subject: Re: AeroElectric-List: Hangar Radios --> AeroElectric-List message posted by: SportAV8R@aol.com Mark- most likely the AM antenna in your boom box is of the ferrite rod type, consisting of a number of turns of fine wire wrapped around a ferrite stick, and coupled to some more turns which may in turn connect to the telescoping whip antenna. This arrangement serves as an impedance matching transformer to couple a very electrically short whip antenna to the radio's input stage. Since the antenna is so electrically short at the frequencies on which it is receiving, the physical direction it is pointed makes (predictably) no real difference in sig strength... the best way to pull in weak stations would be to turn the entire radio cabninet until ideal aiming of the ferrite rod itself is attained. For best results, get the radio outside of a metal building and away from noisy AC mains. IIRC, the rod inside the radio box should point toward (not broadside to) the station of interest. Good luck getting your Rush / Hannity fix ;-) -Stormy ________________________________ Message 16 ____________________________________ Time: 01:34:51 PM PST US From: "Robert L. Nuckolls, III" protection Subject: Re: AeroElectric-List: Niagara/Denso Alternator Overvoltage protection --> AeroElectric-List message posted by: "Robert L. Nuckolls, III" protection At 07:00 PM 11/3/2004 +0100, you wrote: >--> AeroElectric-List message posted by: "Werner Schneider" > >Sorry Bob, > >I was referring to the Voltage Regulator from B&C which has an inbuilt OV >protection and came with the light bulb, I replaced it acceding to your >sketch with a LED together with the two resistors. > >Should read more careful next time Oh, okay. Now I understand. Thanks! Bob . . . --- ________________________________ Message 17 ____________________________________ Time: 01:58:42 PM PST US Subject: Re: AeroElectric-List: Hangar Radios From: "Matt Prather" --> AeroElectric-List message posted by: "Matt Prather" Actually, the 'AM-ness' of the signal isn't really related to the 'line-of- site-ness.' The reason the reception of the comm radios in our airplanes is line of site is the operating frequency (VHF, 118MHz-136MHz). AM broadcast radio is much lower frequency - 530kHz -1700 kHz (0.53MHz - 1.7MHz), and is typically much better at bending around and over obstacles. The lower frequency of the signals means that you need a physically longer antenna to get best reception. As well, AM is susceptible to certain kinds of interference the FM rejects. You might try an inductively coupled booster antenna to work with the internal antenna that your boombox has. A buddy of mine here at work uses one similar to this with good results. Its kind of spendy though... http://www.onecall.com/PID_4536.htm Regards, Matt- > --> AeroElectric-List message posted by: Fiveonepw@aol.com > > Folks, this is extremely obliquely building-oriented, but I know the > answer is here so here goes... > > My new hangar faces away from almost all AM & FM stations I like to > listen to on my cheap ghetto-blaster. I can get the FM by poking the > antenna out the door, but the AM is, as described here often, very much > line-of-sight. I "think" the AM antenna is not connected to the > external telescoping antenna, as it makes no difference in being > in/out/extended/pointed anywhere in particular. Any suggestions short > of getting a different hangar? GOTTA have my AM! > > Thanks and do not archive > Mark > > ________________________________ Message 18 ____________________________________ Time: 02:01:27 PM PST US From: Fiveonepw@aol.com Subject: Re: AeroElectric-List: Hangar Radios --> AeroElectric-List message posted by: Fiveonepw@aol.com In a message dated 11/03/2004 3:00:53 PM Central Standard Time, SportAV8R@aol.com writes: Good luck getting your Rush / Hannity fix ;-) >>>> Oh NEVER! I want my NPR! 8) Mark do not archive ________________________________ Message 19 ____________________________________ Time: 03:42:35 PM PST US From: "Kingsley Hurst" Subject: AeroElectric-List: Grounding --> AeroElectric-List message posted by: "Kingsley Hurst" Bob, I will have my battery forward of the firewall and within 200mm (8") of the engine ground stud. I will also have a firewall ground kit (B&C) on the composite firewall no more than 300mm (12") from the battery. In connecting up the earth straps which routing method would you prefer? 1) Battery -ive, Firewall Gnd, Engine Gnd or 2) Battery -ive, Engine Gnd, Firewall Gnd or 3) Battery -ive to Firewall Gnd and another Battery -ive to Engine Gnd Left to my own devices I would choose No 2 because I think it is the most likely way to prevent the smoking behind the panel problem you cited. Also, I think I would use a continuous strap with a third flag terminal somewhere in the middle so that in the event of the connection at the engine coming loose, I would still have battery power. I am well aware that losing battery power in my little VFR aircraft would not really matter, nevertheless, if there is such a thing as 'best practice' in this case, I would prefer to adopt it. Thanks again in anticipation of your valued assistance. Kingsley Hurst Europa Mono Classic 281 in Oz. ________________________________ Message 20 ____________________________________ Time: 04:16:26 PM PST US Subject: Re: AeroElectric-List: RE: EMags From: "David Shani" --> AeroElectric-List message posted by: "David Shani" I wish them well and hope we get lots of happy feedback from their first couple of years worth of customers. Bob . . . Any real live (customer flying) operational data on the E/P-Mags so far? Thanks, David Shani ________________________________ Message 21 ____________________________________ Time: 05:04:59 PM PST US From: "Larry Bowen" Subject: RE: AeroElectric-List: RE: EMags --> AeroElectric-List message posted by: "Larry Bowen" I emailed them this past Sunday asking for lead times, but never heard back. - Larry Bowen Larry@BowenAero.com http://BowenAero.com > -----Original Message----- > From: David Shani [mailto:David.Shani@sanmina-sci.com] > Sent: Wednesday, November 03, 2004 7:16 PM > To: aeroelectric-list@matronics.com > Subject: Re: AeroElectric-List: RE: EMags > > --> AeroElectric-List message posted by: "David Shani" > --> > > > > I wish them well and hope we get lots of happy feedback > from their first couple of years worth of customers. > > Bob . . . > > > Any real live (customer flying) operational data on the > E/P-Mags so far? > > > Thanks, > > > David Shani > > > ========= > ========= > Matronics Forums. > ========= > http://www.matronics.com/FAQ/AeroElectric-List.htm > ========= > > > > > > ________________________________ Message 22 ____________________________________ Time: 08:33:10 PM PST US From: Ken Subject: Re: AeroElectric-List: Hangar Radios clamav-milter version 0.80j on juliet.albedo.net --> AeroElectric-List message posted by: Ken Which way the radio is pointing matters of course. However I found that in my metal building, putting the radio on a plastic bucket about one foot off the floor solves the problem for me. Can't explain it but anything higher and the signal fades in and out and is not good enough to listen to... Maybe something to do with getting it farther from the fluorescent lights?? Ken Fiveonepw@aol.com wrote: >--> AeroElectric-List message posted by: Fiveonepw@aol.com > >Folks, this is extremely obliquely building-oriented, but I know the answer >is here so here goes... > >My new hangar faces away from almost all AM & FM stations I like to listen to >on my cheap ghetto-blaster. I can get the FM by poking the antenna out the >door, but the AM is, as described here often, very much line-of-sight. I >"think" the AM antenna is not connected to the external telescoping antenna, as it >makes no difference in being in/out/extended/pointed anywhere in particular. >Any suggestions short of getting a different hangar? GOTTA have my AM! > >Thanks and do not archive >Mark > > ________________________________ Message 23 ____________________________________ Time: 09:54:33 PM PST US From: "Tony Babb" Subject: Re: AeroElectric-List: Hangar Radios --> AeroElectric-List message posted by: "Tony Babb" Ok, I know I should read the 'connection about this but I have a similar problem pulling in FM stations in my garage where I build most evenings. My radio has an external antenna jack, does this have to be outside my garage or is it sufficient to simply use an external antenna assuming it's better than the telescoping one that's currently there? Tony ----- Original Message ----- From: Subject: Re: AeroElectric-List: Hangar Radios > --> AeroElectric-List message posted by: SportAV8R@aol.com > > Mark- > > most likely the AM antenna in your boom box is of the ferrite rod type, consisting of a number of turns of fine wire wrapped around a ferrite stick, and coupled to some more turns which may in turn connect to the telescoping whip antenna. This arrangement serves as an impedance matching transformer to couple a very electrically short whip antenna to the radio's input stage. Since the antenna is so electrically short at the frequencies on which it is receiving, the physical direction it is pointed makes (predictably) no real difference in sig strength... the best way to pull in weak stations would be to turn the entire radio cabninet until ideal aiming of the ferrite rod itself is attained. For best results, get the radio outside of a metal building and away from noisy AC mains. > > IIRC, the rod inside the radio box should point toward (not broadside to) the station of interest. Good luck getting your Rush / Hannity fix ;-) > > -Stormy > >