---------------------------------------------------------- AeroElectric-List Digest Archive --- Total Messages Posted Fri 11/03/06: 9 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 04:59 AM - Re: Current limiter and/or Circuit breaker for alternator (Ken) 2. 05:40 AM - Re: Current limiter and/or Circuit breaker for alternator (Grant Neilson) 3. 05:42 AM - Off line for a few days . . . (Robert L. Nuckolls, III) 4. 10:07 AM - Have You Tried The New Matronics List Forum? (Matt Dralle) 5. 10:40 AM - comic book (Carlos Trigo) 6. 11:43 AM - Re: comic book (Terry Watson) 7. 11:56 AM - Re: comic book (Glaeser, Dennis A) 8. 02:19 PM - Re: comic book (Dave N6030X) 9. 10:35 PM - Garmin 396 Ground Loop (Pete Howell) ________________________________ Message 1 _____________________________________ Time: 04:59:16 AM PST US From: Ken Subject: Re: AeroElectric-List: Current limiter and/or Circuit breaker for alternator --> AeroElectric-List message posted by: Ken Further explanation if required would be that yes an ANL is a slow acting fuse and it is equivalent to a breaker. Certainly there is nothing immediately wrong with having multiple devices in a circuit. However both these devices add very small amounts of resistance to the circuit as does the connections to them. Additional resistance could lead to less voltage stability with some regulators, and more maintanance as the system ages. In some cases you may also have a battery contactor and an overvoltage contactor in that B-lead circuit. The general idea is to keep the B-lead short and not run extra length up to the instrument panel and then back to a battery. However a B-lead breaker does not have to be on the panel and does not have to be resettable in flight. Certainly an ANL would not be replaced in flight, nor would you want to. Another reason to keep B-leads short is that they tend to radiate some noise. Since the ANL is protecting the B-lead from excess battery supplied current, it makes sense to keep it close to the battery. As Bob has expained on several occasions, contrary to first look, the purpose of the ANL is definately not to protect anything from excess alternator current. .. Ken Robert L. Nuckolls, III wrote: > --> AeroElectric-List message posted by: "Robert L. Nuckolls, III" > > > At 04:40 PM 11/2/2006 -0800, you wrote: > >> If I install a current limiter, say an ANL80, should I still also >> install a conventional 60 or 70 amp circuit breaker in the alternator >> output? Or is that an unnecessary redundancy? If it's not necessary, >> is there any down side to having both, other than the additional >> minimal weight and cost? >> Thanks for any input. > > > The whole idea behind the ANL is to get the alternator > b-lead out of the cockpit . . . and if it's out of the > cockpit, then ANL or equivalent devices for circuit > protection are called for. Breakers under the cowl > don't make much sense. > > Bob . . . _- _- _- _- _- _- ________________________________ Message 2 _____________________________________ Time: 05:40:45 AM PST US From: "Grant Neilson" Subject: Re: AeroElectric-List: Current limiter and/or Circuit breaker for alternator So the external shunt for my ammeter is also perfectly happy being under the cowl, with the leads to the instrument penetrating the firewall? ________________________________ Message 3 _____________________________________ Time: 05:42:39 AM PST US From: "Robert L. Nuckolls, III" Subject: AeroElectric-List: Off line for a few days . . . --> AeroElectric-List message posted by: "Robert L. Nuckolls, III" Dr. Dee and I are packing the car to head off to Bloomington, IL for a weekend seminar. Be back on Monday. Bob . . . --------------------------------------------------------- < What is so wonderful about scientific truth...is that > < the authority which determines whether there can be > < debate or not does not reside in some fraternity of > < scientists; nor is it divine. The authority rests > < with experiment. > < --Lawrence M. Krauss > --------------------------------------------------------- _- _- _- _- _- _- ________________________________ Message 4 _____________________________________ Time: 10:07:25 AM PST US From: Matt Dralle Subject: AeroElectric-List: Have You Tried The New Matronics List Forum? --> AeroElectric-List message posted by: Matt Dralle Hello Listers, One of the major new additions to the Matronics Email Lists this year was the addition of a new and full function Forum Web Site at: http://forums.matronics.com The best part of these new Forums is that they are tied directly to the Classic email distribution Lists! That also means that posts go in both directions. If you post a message on the Forum web site, it will be cross posted to the respective Email List. And, if you post a message to a particular Email List, it will be cross posted to the same respective forum on the Forum site! So, no matter what your content viewing pleasure is - either direct email distribution or web-based GUI interface, you can have it at the Matronics Email Lists! Won't you make a Contribution to support these Lists? It is your SOLE Contributions that make their continued operation and upgrade possible! The Contribution site is Fast, Easy, and Secure. Please surf over and make your Contribution today: http://www.matronics.com/contribution Thank you!! Matt Dralle Matronics Email List Administrator _- _- _- _- _- _- ________________________________ Message 5 _____________________________________ Time: 10:40:23 AM PST US From: "Carlos Trigo" Subject: AeroElectric-List: comic book --> AeroElectric-List message posted by: "Carlos Trigo" > BNC connectors. I featured this adapter in the comic > book Just to enrich my English language knowledge, what exactly do you mean by "Comic Book" ? Carlos Trigo Portugal _- _- _- _- _- _- ________________________________ Message 6 _____________________________________ Time: 11:43:35 AM PST US From: "Terry Watson" Subject: RE: AeroElectric-List: comic book --> AeroElectric-List message posted by: "Terry Watson" Carlos, I think Bob is off for the weekend, so I will give it a shot. "Comic book", in the sense that Bob is using it, is an annotated series of pictures, usually to show how to do something. Terry -----Original Message----- From: owner-aeroelectric-list-server@matronics.com [mailto:owner-aeroelectric-list-server@matronics.com] On Behalf Of Carlos Trigo Sent: Friday, November 03, 2006 10:40 AM Subject: AeroElectric-List: comic book --> AeroElectric-List message posted by: "Carlos Trigo" > BNC connectors. I featured this adapter in the comic > book Just to enrich my English language knowledge, what exactly do you mean by "Comic Book" ? Carlos Trigo Portugal _- _- _- _- _- _- ________________________________ Message 7 _____________________________________ Time: 11:56:39 AM PST US Subject: AeroElectric-List: Re: comic book From: "Glaeser, Dennis A" --> AeroElectric-List message posted by: "Glaeser, Dennis A" Carlos, This is a term Bob uses for his How-To articles, which are basically pictures with text added as required for explanation. He'll have to explain why he chose that particular term, but it probably dates back to pre-digital picture days when the 'pictures' were hand sketches and the text was hand written - and that is similar to the format of comic books we (who have more than a few grey hairs) grew up with as kids. Dennis Glaeser --> AeroElectric-List message posted by: "Carlos Trigo" > BNC connectors. I featured this adapter in the comic > book Just to enrich my English language knowledge, what exactly do you mean by "Comic Book" ? Carlos Trigo Portugal _- _- _- _- _- _- ________________________________ Message 8 _____________________________________ Time: 02:19:16 PM PST US From: Dave N6030X Subject: Re: AeroElectric-List: comic book --> AeroElectric-List message posted by: Dave N6030X Carlos, think of the "Asterisk and Obelisk" comic book series in France. Dave Morris At 12:40 PM 11/3/2006, you wrote: >--> AeroElectric-List message posted by: "Carlos Trigo" > > >> BNC connectors. I featured this adapter in the comic >> book > >Just to enrich my English language knowledge, what exactly do you >mean by "Comic Book" ? > >Carlos Trigo >Portugal > > _- _- _- _- _- _- ________________________________ Message 9 _____________________________________ Time: 10:35:22 PM PST US From: "Pete Howell" Subject: AeroElectric-List: Garmin 396 Ground Loop --> AeroElectric-List message posted by: "Pete Howell" hello, I just added a Garmin 396 to my RV-9A. I have the audio output connected to my stereo intercom aux inputs along with a traffic monitor and engine monitor (with isolation resisitors). When I have the 396 powered through the airplane, I get audio noise. If I run it on battery, the noise goes away. I'm thinking ground loop. The 396 power ground goes to the main ground block on the firewall. The audio grounds go to an avionics ground bus at the back of the intercom that is ultimately wired to the main ground block. Any thoughts? I won't mess with this too long before I will try an inline ground loop isolator like this one: http://www.discountcarstereo.com/detail.aspx?ID=970 Thanks, Pete _- _- _- _- _- _-