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
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| Subject: | RE: AeroElectric-List Digest: 16 Msgs - 10/10/11 |
Message 2
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| Subject: | Re: 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:
> <nuckolls.bob@aeroelectric.com>
>
> At 11:30 AM 10/10/2011, you wrote:
> <handainc@madisoncounty.net>
>
> 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
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| Subject: | Re: System Design |
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
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| Subject: | Re: Noisey Power Supplies. |
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
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| Subject: | 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
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| Subject: | Re: Noisey Power Supplies. |
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
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| Subject: | Re: System Design |
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
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| Subject: | Re: Lithium Batteries? |
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
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| Subject: | 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
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| Subject: | 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
>
> <handainc@madisoncounty.net>
>
> 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:
> > <nuckolls.bob@aeroelectric.com>
> >
> > At 11:30 AM 10/10/2011, you wrote:
> > <handainc@madisoncounty.net>
> >
> > 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
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| Subject: | Re: Halogen bulbs with wig wag circuitry....failure |
mode
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
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| Subject: | Re: Halogen bulbs with wig wag circuitry....failure |
mode
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
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| Subject: | Re: Electric aircraft issues |
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
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| Subject: | 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.
Bob . . .
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