---------------------------------------------------------- AeroElectric-List Digest Archive --- Total Messages Posted Tue 10/11/11: 14 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 12:34 AM - Re: AeroElectric-List Digest: 16 Msgs - 10/10/11 (K Fohringer) 2. 06:16 AM - Re: Handheld Radio Antenna (Marvin Haught) 3. 08:13 AM - Re: System Design (user9253) 4. 08:26 AM - Re: Noisey Power Supplies. (Brantel) 5. 11:02 AM - Re: Re: Noisey Power Supplies. (Robert L. Nuckolls, III) 6. 12:15 PM - Re: Noisey Power Supplies. (Brantel) 7. 05:04 PM - Re: System Design (user9253) 8. 05:18 PM - Re: Lithium Batteries? (Eric M. Jones) 9. 06:07 PM - Tentative Zenith Electrical Design (Dan Sherburn) 10. 06:23 PM - Re: Handheld Radio Antenna (Bob McCallum) 11. 07:14 PM - Re: Halogen bulbs with wig wag circuitry....failure mode (shenglu) 12. 07:28 PM - Re: Halogen bulbs with wig wag circuitry....failure mode (shenglu) 13. 07:57 PM - Re: Electric aircraft issues (shenglu) 14. 08:11 PM - Re: Re: Noisey Power Supplies. (Robert L. Nuckolls, III) ________________________________ Message 1 _____________________________________ Time: 12:34:24 AM PST US From: "K Fohringer" Subject: AeroElectric-List: RE: AeroElectric-List Digest: 16 Msgs - 10/10/11 ________________________________ Message 2 _____________________________________ Time: 06:16:04 AM PST US From: Marvin Haught Subject: Re: AeroElectric-List: Handheld Radio Antenna Bob - Can I use 3/16 inch stainless welding rod for the antenna? The piano wire rusts easily, and I have the welding rod on hand. M. Haught On 10/10/2011 9:29 PM, Robert L. Nuckolls, III wrote: > > > At 11:30 AM 10/10/2011, you wrote: > > > Bob - > > Have a couple of projects on which I need antennas. Just bought 3 of > the antenna mounts on ebay for $12+ including shipping. Where do I > get the coax connectors? I've been looking on line but haven't seen > any that look exactly like that one. Obviously, I'm new at this and > am totally unfamiliar with the parts. Will also need the antenna wire. > Do you have a section some where that I can read up on antenna > installation? > > Yes, there is a chapter on antennas and feed lines in > The 'Connection. Modern coax is available from > a variety of sources. RG400 141 or 142 are all suited > to your task. I have an RG142 special (your choice of > connectors installed for no extra charge). You might > consider the offering at: > > https://matronics.com/aeroelectric/Catalog/AECcatalog.html > > You can get a 4-pack of those adapters off eBay > for about $11 including shipping at: > > http://tinyurl.com/3zmxkg8 > > > Bob . . . > > -- H.Marvin Haught Jr. Haught& Associates, Inc Huntsville, AR 72740 ________________________________ Message 3 _____________________________________ Time: 08:13:06 AM PST US Subject: AeroElectric-List: Re: System Design From: "user9253" The 100 amp starter fuse and 50 amp aircraft fuse are not normally used in aircraft. Evidently this circuit has been used successfully. But I question why the 100 amp starter fuse does not blow. I thought that starter motors draw hundreds of amps. The other fuses and wires are not sized to match each other or the loads. The "Backup" switch is a single point of failure. When it fails, the engine quits. The ECU Select relay is another single point of failure. When it fails, the engine quits. The relay is SPDT, not SPST as labeled. The 25 amp fuse and wire for engine electrical power are more single points of failure. When the fuse blows or the wire breaks, the engine quits. The recommendation to "Replace capacitor every other annual inspection", is being overly conservative. Other parts like fuses and switches are just as likely to fail. Joe Gores -------- Joe Gores Read this topic online here: http://forums.matronics.com/viewtopic.php?p=354671#354671 ________________________________ Message 4 _____________________________________ Time: 08:26:23 AM PST US Subject: AeroElectric-List: Re: Noisey Power Supplies. From: "Brantel" Are you making and selling the PC board used in this design? If so, details? Read this topic online here: http://forums.matronics.com/viewtopic.php?p=354677#354677 ________________________________ Message 5 _____________________________________ Time: 11:02:03 AM PST US From: "Robert L. Nuckolls, III" Subject: Re: AeroElectric-List: Re: Noisey Power Supplies. At 10:23 AM 10/11/2011, you wrote: > >Are you making and selling the PC board used in this design? If so, details? I presume we're talking about the filtered mounting board for a BuckPuck. Yes, I have boards with filters install and no BuckPuck . . . or complete assemblies with 1A BuckPuck. I guess if you wanted a bare board, I could acomodate that also . . . but buying filter components in small quantities is probably not cost effective. See the catalog page on my website. Bob . . . ________________________________ Message 6 _____________________________________ Time: 12:15:09 PM PST US Subject: AeroElectric-List: Re: Noisey Power Supplies. From: "Brantel" No Bob, Sorry, Talking about the one that Eric Jones posted a schematic and directions for in this post: http://forums.matronics.com/viewtopic.php?t=84628 It is a design for a linear regulator instead of a switching regulator which is a little less efficient but does the job without all of the noise issues. I already have two of yours...they work great! Read this topic online here: http://forums.matronics.com/viewtopic.php?p=354713#354713 ________________________________ Message 7 _____________________________________ Time: 05:04:06 PM PST US Subject: AeroElectric-List: Re: System Design From: "user9253" Controlling the alternator field coil with the ignition switches is a bad idea. The way it is now, the alternator can not be shut off without shutting off the engine. If the alternator quits working, the alternator field should be shut off to conserve the battery. If the alternator puts out too high of a voltage, it needs to be shut off, preferably with automatic over-voltage protection. I suggest using one of Bob's schematics instead of Viking's. Joe -------- Joe Gores Read this topic online here: http://forums.matronics.com/viewtopic.php?p=354737#354737 ________________________________ Message 8 _____________________________________ Time: 05:18:44 PM PST US Subject: AeroElectric-List: Re: Lithium Batteries? From: "Eric M. Jones" A few years ago I related to Bob N. my experience with a a couple 12V carbon-zinc Eveready lantern battery that I used to power a Telex intercom (which usually plugged into the rarely-connected cigar lighter). The first battery was found dead under mysterious circumstances (I was probably lucky). The replacement battery, upon shutting down the aircraft was too hot to touch and I grabbed it by the wires and tossed it out onto the asphalt. It melted a dent in the ramp. It was smoking. I surmised that the batteries had some internal crushing damage from rapid descent, but perhaps they were damaged from voltage fed back from the intercom. But I can't see how. The intercom was undamaged. This whole thing remains a mystery, but I offer it as a clue regarding batteries. Batteries might need to have mechanics that withstand deformation by rapid pressure changes. -------- Eric M. Jones www.PerihelionDesign.com 113 Brentwood Drive Southbridge, MA 01550 (508) 764-2072 emjones@charter.net Read this topic online here: http://forums.matronics.com/viewtopic.php?p=354739#354739 ________________________________ Message 9 _____________________________________ Time: 06:07:18 PM PST US From: "Dan Sherburn" Subject: AeroElectric-List: Tentative Zenith Electrical Design I'm building a Zenith CH750 (just started). The Zenith Builders group directed me to the AeroElectric Connection. I've ordered Bob's books and CD. I've utilized one of the sample drawings I'd like to use as the basis for an electrical design for my Zenith. To date, I'm planning on a very simple, day, VFR airplane. Continental 0200, no vacuum. As such, I'm looking for a very simple, proper electrical design for the plane. Attached is a straight forward electrical design taken from the AeroElectric Connection samples. Please review and comment. I've yet to detail avionics, but at a minimum I'll have a simple GPS and Comm (no Nav), but a transponder is a "maybe". I'm an Electrical Engineer, which doesn't mean alot in terms of Aircraft electrical systems; just that I'm comfortable with electrical control systems Thanks in advance! Dan Sherburn Michigan ________________________________ Message 10 ____________________________________ Time: 06:23:57 PM PST US From: Bob McCallum Subject: RE: AeroElectric-List: Handheld Radio Antenna Yes ! Or 1/8 " whichever you have on hand. Bob McC > -----Original Message----- > From: owner-aeroelectric-list-server@matronics.com [mailto:owner-aeroelectric-list- > server@matronics.com] On Behalf Of Marvin Haught > Sent: Tuesday, October 11, 2011 9:12 AM > To: aeroelectric-list@matronics.com > Subject: Re: AeroElectric-List: Handheld Radio Antenna > > > > Bob - > > Can I use 3/16 inch stainless welding rod for the antenna? The piano > wire rusts easily, and I have the welding rod on hand. > > M. Haught > > > On 10/10/2011 9:29 PM, Robert L. Nuckolls, III wrote: > > > > > > At 11:30 AM 10/10/2011, you wrote: > > > > > > Bob - > > > > Have a couple of projects on which I need antennas. Just bought 3 of > > the antenna mounts on ebay for $12+ including shipping. Where do I > > get the coax connectors? I've been looking on line but haven't seen > > any that look exactly like that one. Obviously, I'm new at this and > > am totally unfamiliar with the parts. Will also need the antenna wire. > > Do you have a section some where that I can read up on antenna > > installation? > > > > Yes, there is a chapter on antennas and feed lines in > > The 'Connection. Modern coax is available from > > a variety of sources. RG400 141 or 142 are all suited > > to your task. I have an RG142 special (your choice of > > connectors installed for no extra charge). You might > > consider the offering at: > > > > https://matronics.com/aeroelectric/Catalog/AECcatalog.html > > > > You can get a 4-pack of those adapters off eBay > > for about $11 including shipping at: > > > > http://tinyurl.com/3zmxkg8 > > > > > > Bob . . . > > > > > > > > > > > > > -- > H.Marvin Haught Jr. > Haught& Associates, Inc > Huntsville, AR 72740 > > > > _- > ==================================================== > ====== > _- > ==================================================== > ====== > _- > ==================================================== > ====== > _- > ==================================================== > ====== > > ________________________________ Message 11 ____________________________________ Time: 07:14:11 PM PST US Subject: AeroElectric-List: Re: Halogen bulbs with wig wag circuitry....failure mode From: "shenglu" Most of the HID is 35 watts. I look forward to these about twice as bright as 100 watts incandescent, but not power them. I do not think this is an expensive upgrade. -------- Read this topic online here: http://forums.matronics.com/viewtopic.php?p=354750#354750 ________________________________ Message 12 ____________________________________ Time: 07:28:33 PM PST US Subject: AeroElectric-List: Re: Halogen bulbs with wig wag circuitry....failure mode From: "shenglu" Light resistance is not dependent on our wig grow up. They include the MOSFET drivers and some simple two large internal timer-driven MOSFET. They cost more than the type of car. -------- Read this topic online here: http://forums.matronics.com/viewtopic.php?p=354753#354753 ________________________________ Message 13 ____________________________________ Time: 07:57:35 PM PST US Subject: AeroElectric-List: Re: Electric aircraft issues From: "shenglu" I can think of three ships with lithium loss. One is on the ground, there is no loss of life, burnt down the runway about 4 hours. The other two did not end so well. -------- Read this topic online here: http://forums.matronics.com/viewtopic.php?p=354755#354755 ________________________________ Message 14 ____________________________________ Time: 08:11:32 PM PST US From: "Robert L. Nuckolls, III" Subject: Re: AeroElectric-List: Re: Noisey Power Supplies. At 02:08 PM 10/11/2011, you wrote: > >No Bob, Sorry, > >Talking about the one that Eric Jones posted a schematic and >directions for in this post: > >http://forums.matronics.com/viewtopic.php?t=84628 > >It is a design for a linear regulator instead of a switching >regulator which is a little less efficient but does the job without >all of the noise issues. > >I already have two of yours...they work great! Oh . . . if Eric doesn't have a board for the LM317 version of a constant current generator, I have a constant current board I'm doing for a customer right now. It's based on a TO247 power mos-fet and is capable of offering constant current values upwards of 3 amps. Emacs! This board is about 1.3 x 1.4 inches. The power fet heat sinks through an insulating washer. 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