---------------------------------------------------------- AeroElectric-List Digest Archive --- Total Messages Posted Sun 07/27/14: 4 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 05:51 AM - Re: Schematic symbol (Michael Garmon) 2. 08:38 AM - Re: Schematic symbol (Robert L. Nuckolls, III) 3. 12:32 PM - Re: GNS430 Microphone/Sidetone Problem (John Loram) 4. 03:01 PM - Lithium Battery Experience - Sept. Kitplanes Article (jaustinmd) ________________________________ Message 1 _____________________________________ Time: 05:51:14 AM PST US Subject: Re: AeroElectric-List: Schematic symbol From: Michael Garmon Mike, I have used this symbol. I believe I found it in the "The Aeroelectric Connection" on page 1-10 in Figure 1-13. -Michael Garmon On Sat, Jul 26, 2014 at 9:54 PM, mmayfield wrote: > mmayfield@ozemail.com.au> > > OK, I give in. I've looked everywhere for a schematic symbol for a > switch-breaker. I have every type of switch known to humankind, and > standard circuit breakers, but not a switch-breaker. > > Any clues, or is it just drawn like a standard circuit breaker? > > -------- > Mike > > > Read this topic online here: > > http://forums.matronics.com/viewtopic.php?p=427390#427390 > > ________________________________ Message 2 _____________________________________ Time: 08:38:15 AM PST US From: "Robert L. Nuckolls, III" Subject: Re: AeroElectric-List: Schematic symbol At 07:49 AM 7/27/2014, you wrote: >Mike, >I have used this symbol. I believe I found it in the "The >Aeroelectric Connection" on page 1-10 in Figure 1-13. > >-Michael Garmon I don't think there is any 'industry recognized' symbol unique to this device so as Mike has noted, I made one up. If you're doing AutoCAD drawings, the symbol is included in the library of symbols on the website. I recall a few years back that there was no 'industy recognized' symbol for the DPDT-ON-ON-ON toggle switch. At least not in the 'approved' mil-spec symbology that had been adopted by Cessna. One such switch was used in an autopilot installation I had to write about. I crafted a symbol not unlike those found in the 'Connection publications today. Got a bucket of flack from my super and was told to use the symbol for a DP3T ON-OFF-ON . . . which happened to be the way that ARC Radio supplied the schematic to us!. "But boss!", sez I. "That doesn't help me explain how it works to my readers. "Don't you never mind son . . . it's ARC's product and we'll treat them with respect." "Oh," sez I. "Okay". I had to write a bunch of words explaining how the switch functioned in the system hoping that my words would over-ride the 'jump off the page' misunderstanding that was published in the drawing. A few years later, alternators started finding their way onto our airplanes, the great DC Master Switch Conundrum rose up whereupon the split-rocker was born. Hmmm . . . how to show THAT thing on a drawing? One of the guys over in the electrical group came up with this: Emacs! Push the bottom switch to ON and it forces the top switch ON too. But with both on, you can turn the bottom switch OFF and leave the top switch ON. "Cool" thinks I. "A schematic symbol that COMMUNICATES functionality with little if any head-scratching on the part of the observer." Guess what? THAT switch wasn't in the mil-specs either . . . but the guy heading up the electrical group understood the value of jump-off-the-page understanding better than my boss . . . who was in the business of publishing. The point to be taken away from this missive and Jeff's comment is that what ever symbol you do use should first NOT CONFUSE any future readers of your work product. After that, speak (or draw) to operational nuances in ways that jump-off-the- page at you. I've seen breakers depicted thusly on various drawings over the years Emacs! and all three of these pictures 'make sense' when more than one style appears in the same publication. It helps when either a table of symbols or accompanying text speaks to the existence of more than one style of breaker in the system . . . but as Jeff points out, were you to use ANY of the three to speak to the ELECTRICAL functionality of any circuit breaker in a schematic, no valuable information is lost. Adding the little nuances to depict MECHANICAL operation is just icing on the cupcake. Bottom line is, make a drawing that YOU understand first but keeping in mind that it may be useful that somebody else understands it in the future. Bob . . . ________________________________ Message 3 _____________________________________ Time: 12:32:28 PM PST US From: "John Loram" Subject: RE: AeroElectric-List: GNS430 Microphone/Sidetone Problem Sound like the voice of experience! -----Original Message----- From: owner-aeroelectric-list-server@matronics.com [mailto:owner-aeroelectric-list-server@matronics.com] On Behalf Of David Lloyd Sent: Saturday, July 26, 2014 6:02 PM Subject: Re: AeroElectric-List: GNS430 Microphone/Sidetone Problem --> Sacha makes a very good point. . The 430 chassis to box-chassis connector fit is finicky. I know. . .I have the "T-shirt" If the box-chassis is mounted in the aircraft panel a little to deep, this causes a problem. For when the 430 is slid into the box, it will not seat back deep enough to fully engage some connector pins. The fix is to loosen up the panel mounted box chassis and pull it forward to be flush with the panel or even a tad ( 1/16") out in front of the panel and then re-bolt it back to the panel framing. Another point. . .I do not recommend that you use the 430 locking jack mechanism to pull the 430 back into its locked position. If something is not aligned correctly you will not know it using the this method and could damage pins. I suggest that you get the 430 inserted by hand, fingers on each end of the the 430 panel. Gently rock it back in place feeling for any obstruction. Get it started in, turn the jacking system just enough to take up the slack. Then, using fingers only, rock the 430 further back into place and again feel for any odd resistance, then, using the jack, take up the slack. Continue this until you "feel" it seat properly with it rear connectors. Stop if you feel any odd resistance and start over after checking for any bent pins, etc. David ----- Original Message ----- From: "Sacha" Sent: Saturday, July 26, 2014 11:20 AM Subject: Re: AeroElectric-List: GNS430 Microphone/Sidetone Problem > > I had that problem. The GNS430 wasn't fully inserted into its slot and > although the RX and TX button lit up it did not seem to transmit (or > receive as I remember). See > > http://forums.matronics.com/viewtopic.php?t=98650&view=next&sid=a9694aaf0de0 5619e08664647aea1483 > > >> On 26 Jul 2014, at 18:01, Matthew Prather wrote: >> >> I think someone had this issue when their radio wasn't fully inserted >> into the tray/rack. Might not be the case here, but could be worth >> checking out. > > > ________________________________ Message 4 _____________________________________ Time: 03:01:44 PM PST US Subject: AeroElectric-List: Lithium Battery Experience - Sept. Kitplanes Article From: "jaustinmd" Bob requested in his recent article that those experimenting with Lithium batteries relate their experiences. I built a Zenith STOL CH750 with a Jabiru 3300 engine - a day/VFR, non-electrically dependent aircraft - perfect for experimentation! I originally installed a PC680 and it worked flawlessly. As I accumulated hours and increased empty weight from various modifications, I looked to using a LiFePO4 battery to gain back some useful load. I had heard that the Aerovoltz 12-cell would readily crank the Jab 3300, so I purchased a Ballistic 12-cell (same battery but cheaper!). Initially, things were fine - it spun the 3300 as good or better than the PC680 (and saved about 12-13 lbs doing it!). However, I began to get erratic tach readings and looked at the alternator leads where the tach picks up and the Jabiru OEM female spade leads appeared burned! After consulting Jabiru USA, I replaced the rather flimsy leads with quality AMP female spade connectors. THEN, my 20 amp alternator breaker began to trip! At this point, I did a lot of research and found that since the Jab 3300 doesn't output charging current 'til about 1800-1900 rpm, my theory was that the connectors were frying due to the surge of charging current after take off and low internal resistance of the battery, and once the connectors were corrected, the little Ballistic battery was getting hit with a surge of charging current in excess of 20 amps and tripping the breaker. I did two things - I reviewed my wiring and found I was good for up to a 35 amp breaker to protect it, so I replaced the breaker with a 35A, and switched to an EarthX ETX36D which supposedly has close to the capacity of the PC680. I'm really happy so far (several months) with the ETX36D - it seems to function just as well as the PC680. It spins the prop for starts as well or better as the PC680 and although the Jab 3300 is not charging during ground operations, there is negligible voltage drop when powering-up the EFIS, transponder, radio, etc. (The PC680 found a happy home in my '82 911SC Porsche, which was a weight savings vs a conventional auto battery!) The Ballistic will be re-purposed in my UTV. Time will tell as to durability and performance of the EarthX, but for now I'm a happy camper! John N750A Read this topic online here: http://forums.matronics.com/viewtopic.php?p=427414#427414 ------------------------------------------------------------------------------------- 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.